MINISTRY OF HEALTH OF THE REPUBLIC
UZBEKISTAN
TASHKENT MEDICAL ACADEMY

Department: ENVIRONMENTAL HYGIENE
Subject: HYGIENE. MEDICAL ECOLOGY

MODEL OF LEARNING TECHNOLOGY IN THE PRACTICAL LESSON

"Methods for assessing the functional state of the body when performing mental work"

For teachers and students of the 2nd year of the Faculty of Preventive Medicine

Tashkent -20__           

TECHNOLOGY OF LEARNING IN THE PRACTICAL LESSON
on the topic "Methods for assessing the functional state of the body when performing mental work"

Time: 5 hours	Number of students: 12-15	
The structure of the lesson.	1 Introductory word of the teacher.
2. Control of the initial level of knowledge.
3. Theoretical part
4. Analytical part
-Tests and situational tasks
- graphic organizers
5. Independent work of students.
6. Evaluation of students' independent work.
7. Conclusion with individual analysis.
8. Task for the next lesson.	
Lesson objectives:	- To acquaint students with the features and nature of various types of mental labor.
- To acquaint students with the main means of increasing labor productivity and preventing fatigue during mental work.
  -characteristics and nature of various types of mental labor
- Identify and evaluate visible physiological effects on mental performance
- Names of devices, tables used in the examination of the functional state of the body and principles of operation	
 	Learning outcomes
Upon graduation, the student should know:
- to determine the latent time of the action of the motor reaction to light or sound impressions
- Assess the state of the central nervous system using a correction test
- evaluate the functional state of the vision analyzer, form a critical review;
the student must be able to:
- to determine the latent time of the action of the motor reaction to light or sound impressions
- Assess the state of the central nervous system using a correction test	
Teaching methods	- demonstration
- individual work
- work in small groups	
Forms of organization of educational activities	- group
-individual	
Means of education	- handout training materials
- lecture texts
- forms of documents	
Ways and means of feedback	- oral control
- written control
- presentation of the results of the educational task	
	Technological map on the topic
Stages of work
Time	The content of the teacher's activity	The content of the student's activity	
Stage 1
Introduction to the lesson
40 min.	1.1. Informs the topic, purpose and planned learning outcomes. Introduces the features of the training session.
1.2. Conducts an assessment of the initial knowledge of students.
1.3. Reports indicators and criteria for evaluating educational work in the classroom.	Listen, write, clarify, ask questions, answer questions.	
Stage 2
Basic
120 min.	2.1. Provides students with:
-laboratory equipment
- visual aids
- handouts
2.2. Gives explanations for them.
2.3. Controls the independent work of students on the development of practical skills in accordance with the algorithm of actions in steps.
2.4. Directs the activity of students to the correct execution of the protocol in accordance with the proposed scheme.	They listen, write down, calculate, analyze, draw conclusions, draw up a report on the work done, present the results of the work.	
 Stage 3 Final-resulting.
40 min.	3.1. Makes a conclusion on the topic.
  3.2. Concentrates the attention of students on the main thing, informs about the importance of the work done for future professional activities.
3.3. Checks student reports.
3.4. Evaluates the activities of students, sums up the mutual assessment.
3.5. Analyzes and evaluates the degree of achievement of the goal of the training session in accordance with the criteria for assessing the current control.
3.6. Gives assignments for independent work for the next lesson. Reports indicators and criteria for its evaluation.	Conduct self-assessment and peer assessment.
They ask questions.
Write down the task.	

                 
1. INTRODUCTION
1.1. Location of the lesson
Department of Environmental Hygiene
1.2.Motivation
     
-The decisive factor in the formation of man is labor. The main goal of physiological examinations of hygienists should be to study the influence of the labor process on the general condition of the human body and its ability to work, to develop preventive measures that make work as easy as possible and increase its productivity. Such checks should contribute to the development of new and promising labor processes: continuity of production, conveyor lines, accelerated processing methods, control of modern complex automated control systems, etc.
Physiological examinations are necessary to develop a reasonable regime of work and rest. At the same time, the main task of physiological examinations is to coordinate the time of work and rest, which will help maintain a high level of efficiency and a stable and unchanged state in a person in specific production conditions.

                    1.3. Interdisciplinary and intra-subject communications
       Teaching the hygiene of medical ecology is based on the students' knowledge of the basics of physics, chemistry, biology, anatomy and human physiology. The knowledge gained will be used by students in the future when studying at the Department of Communal Hygiene

2. CONTENT OF THE LESSON
2.1. Theoretical part
        The mechanization and automation of industrial enterprises, the introduction of control panels, automatic lines, and electronic computers radically changed the nature of the physiological influences of workers and significantly increased the role of mental activity and neuropsychic activity. Many professions in modern industrial enterprises in practice become a kind of mental labor. Airport controllers, railway station operators, power grid operators and automated line operators need to receive and respond to very large amounts of data in a very short period of time, prepare timely responses to this data and make appropriate decisions. A negative factor in the conditions of flow-conveyor enterprises is the continuation of labor activity in the same tone, which lowers the mood of workers, worsens their condition and, as a result, leads to nervous exhaustion. Mental work is diverse, some require creative thinking, others focus on stress and form a quick reaction to external stimuli. The main means of preventing fatigue and improving working capacity, increasing labor productivity (whether physical or mental labor), proper organization of work and rest, reasonable work schedule, proper working conditions, design of machines, tools and equipment, the human body - Compliance with physiological characteristics, mechanization and automation production, the creation of the most suitable sanitary and hygienic conditions at the workplace, the use of industrial gymnastics.
The main forms of industrial gymnastics performed directly at the workplace include the organization and holding of physical culture breaks to perform a set of exercises in accordance with the characteristics of work in each profession. At the first signs of fatigue, physical culture breaks are organized for 5-7 minutes. The healing effect of gymnastics not only eliminates fatigue, but also increases labor productivity. During the working day, a reasonable regime of work and rest is developed, taking into account changes in the functional conditions in the body of workers.

Methods for checking the functional state.

	The physiological state in the body of workers in mental labor is carried out using the following methods:
A) determine the latent time of exposure to a motor reaction to light or sound stimuli;
B) Determination of the functional state of the central nervous system
To characterize the functional state of the CNS, a latent period is determined during the working day to determine the origin of the body's response to exposure. To describe the functional state of the central nervous activity, the method of measuring the latent time before the onset of visual-motor and auditory-motor interactions is used. To conduct an experiment, the experiment is first verbally explained.
The most objective method is to determine the time elapsed before the response of the body. The duration of the latent period of the response is determined using a chrono-reflexometer. The subject first develops a conditioned reflex to stimuli (conditioned stimuli) given by the experimenter. Light or sound signals can be used as conditioned stimuli.
At each test, the subject must receive oral explanations in advance. For example, after my word "attention" you need to press this button. The device in front of you lights up a white, blue, or green light.
When you hear the word white or blue given to you, you should immediately remove your hand from the button if it corresponds to the color of this conditional impression. If, with a given conditional impression, a green light lights up, you must not take your hand off the button. To prevent the formation of a dynamic stereotype to light or sound signals transmitted in the controller, the transmitted signals should be given in the range of 3-5-10 seconds.
Differentiated or separate signals (lighting of the green lamp) are given after every 4 prints (2 white and 2 blue), i.e. positive impression.
Each test produces 10 positive and 2 negative light signals, 2 low frequency positive and 1 negative high frequency beep. The results of responses to complex and simple color signals of different colors are then statistically processed. The duration of the latency period is expressed in milliseconds. As a rule, the impact of light effects is stronger than the reaction to sound effects. The reaction to simple color impressions is less than to complex ones. Due to fatigue, the response time increases. If it exceeds milliseconds, the response response is considered to have changed significantly. If the amount of time in the latent period changes dynamically, then a conclusion is made about a functional change in the activity of the central nervous system depending on the percentage of observed errors. A general decrease in the mental abilities of workers (the predominance of the inhibition process) is considered as a reaction to the impact, if the latent period of exposure is lengthened and the frequency of errors at the end of the working day increases (negative impression on the subject). - removes hand from button when green). These results of physiological tests also describe the state of the general reactivity of the body.
Method of proof tests.
This technique is widely used in the practice of psychophysiological research to test the volume and concentration of attention, which very informatively reflect the state of the central nervous system and, in particular, changes in its functions in the dynamics of any activity, especially mental work. The results of the correction test are largely determined by the type of nervous activity, the nature and duration of the functional load and reflect the state of the processes of excitation and inhibition in the cerebral cortex, as well as the general tone of the body, which depends on many factors and can, as evidenced by numerous literature data, be corrected with the help of various artificial factors aimed at improving the environment and conditions of human production activities. Moreover, this test showed a very high sensitivity and information content during mass hygienic studies conducted for various purposes, including those given in the corresponding section of the methodological manual, where the possible targeted use of physiological express methods was indicated.
The methodology for assigning test items describes the ability for mental work, as well as the general level of fatigue. (To conduct this experiment, you can use tables (modified) developed by employees of the Department of Physiology of the Institute of Occupational Health and Occupational Diseases of the TFA - AMS of the former USSR based on the "shutdown" method proposed by the French scientist Bourzon. When deleting letters in the text given to the subject, a set of letters is used the same size and the same spacing randomly in a row.Each table has 4 text groups of 5 lines.The number of letters in each line is 60, and the number of changes in each of the 5 lines is 60, and only the examiner knows about it.
When deleting letters in the text given to the subject, a set of letters of the same size and with the same spacing is used in a random order in a row. Each table has 4 text groups of 5 lines. The number of letters in each line is 60, and the number of changes in each of the 5 lines is 60, and only the examiner knows about it.
Quantitative assessment of performance is estimated by the speed of the work performed, which is determined by the formula: V = N / T
where: V - the speed of viewing characters in 1 minute;
         N is the total number of characters viewed;
         T is the time it takes to view these symbols

In tests, for example, 2 letters are drawn (for example, "ar"). All work is done in 180 seconds. The change of letters in each check should be different. For a comprehensive assessment of attention, it is necessary to determine the level of attention. The attention index is calculated according to the formula (proposed by the Ural State Institute):
A \u003d (V / m + 1) x 100
Here: A - focus indicator in arbitrary units
             V - scanning speed in 1 second
             m - allowable errors
           Rating: When the condition is below 37.4 conv. units the function of the state of attention is below average, from 37.4 to 48.6 - average, with more than 48.6 - above average.
DETERMINATION OF MENTAL WORKABILITY USING THE CORRECTION TEST.
Purpose: to learn to identify rhythmic or load-induced changes in mental performance.
        Equipment: v. Ya. Anfimov's correction table, stopwatch, calculator.
Progress:
1. This method is the most informative for detecting changes in mental performance, so at least two tests are required, performed at intervals of time by the same subjects. These tests can be performed at the beginning and at the end of a lesson, a big break, a working day, or during the day at regular intervals.
2. Participants in the study should be given the tables of v. Ya. Anfimov (see below) and given instructions.
3. On the command "start!" within 2 min. Using a stopwatch, the subjects should cross out the letters indicated during the briefing, let's say "a" and "n".
4. On command "stop!" note the place where he was. Finished viewing.
5. Then the task becomes more difficult. Over the next 2 min. The subjects should continue to cross out the letters "a" and "n", but certain combinations of these letters with others should be emphasized, for example, the letter combinations "sa" and "en".
6. Task with differentiation (complicated task) in some cases may be omitted.

FORM FOR STUDYING THE STATE OF THE HIGHER NERVOUS ACTIVITIES
ACCORDING TO THE ANFIMOV METHOD
An experience № _________ 20__ г.  Date _________ Time ____________
Surname ___________________________ age ________
Terms _________________________________________________

7. Count the number of characters viewed and errors made throughout the work and separately in each part. Under an error it is necessary to understand not crossed out given letters, and also not underlined given letter combinations or underlined not given letter combinations.
Record the results in a table on the form.
8. For each sample, calculate the coefficient of mobility of nervous processes (K). The more K, the greater the mobility of the nervous processes. Record the results in a table (see below).
K \u003d X / (X - Y) \u003d ____ / ____ \u003d ____ / ____
9. Calculate the work productivity coefficient (Q) for each sample, enter the results in the table. C - the number of scanned lines.
Q = C2 / (C + X1 + Y1) = ____ / ____ = ____ / ____
X - the quality of all viewed signs in both tasks (simple and differentiated);
Y - the number of all viewed characters in the task (simple and differentiated);
X1 - the number of errors in both tasks (simple and differentiated);
Y1 - the number of errors in the task with differentiation;
X(500) - error rate in both tasks in terms of 500 characters,
Y(200) - frequency of errors in the task with differentiation in terms of 200 characters.
10. Evaluate the results obtained in a number of samples using the evaluation table (see Table 3).
11. Make a conclusion about the change in performance over the period of observation, about the causes of the observed processes.
Conclusion: _____________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________

A method for determining the stability of clear vision.

This method is based on the ability to see distances or gaps between individual details, sometimes clearly, sometimes indistinctly.
The gaps of the checked Landolt rings are transferred to a sheet of paper at a distance of 2.5 m on one side. Rings have the following dimensions: outer diameter - 3.5mm, thickness and cut 1mm. The screen should be even and well lit (100-150 lux).
At the command of the inspector, he carefully examines the rings to be inspected. From time to time, the rings are clearly visible, and sometimes they creep out of the field of view. When the gap in the ring is not visible, the subject answers “I didn’t see”, and when the gap is visible, he answers “I see”. The duration of clear and inaccurate viewing is determined using a stopwatch. The experiment is carried out for 2 minutes or 3 minutes.
The stability of clear vision is the percentage of time spent on clear vision of the total time. A shift of more than 10% is referred to as a decrease in clear visual stability. For example, at the beginning of the working day, a clear visual stability was 80 seconds:
                                     120 sec - 100%
                                       80 sec - X
X = 66.6%, i.e. the net index of visual stability before the start of work is 66.6%. At the end of the working day, the time spent on clear vision was 50 seconds:
120 sec - 100%
   50 sec - X X = 41.6%
This means that by the end of the working day, the indicator of visible visual stability has decreased by 25% (66.6 - 41.6 = 25%).
Other methods can be used to carry out checks. It depends on the task and the technical capabilities of the subject. Checks should be carried out on the same persons before and after work (in dynamics - even during work).
The assessment of physiological parameters is carried out by comparison with the data at the beginning of the working day.
DETERMINATION OF THE CAPACITY OF THE VISUAL ANALYZER.
The bandwidth of the visual analyzer is the maximum speed with which the visual analyzer can transmit various information. It is measured in bits - units of numerical measurement of any information accepted in information theory.
To assess the throughput of the visual analyzer, tables with Landolt rings are widely used. The essential advantages of these tables are that all rings are homogeneous in terms of perception, and, therefore, carry the same information (0.543 bits). The table contains 660 rings, each of which has a gap in one of 8 possible directions.
Order of definition. The subject counts the number of rings with a certain direction of breaking the ring for one or another orientation of the table. The duration of viewing the entire table is recorded by a stopwatch. Next, the number of missed rings is counted, since the true number of rings with a certain break position is known from table 1. Depending on its orientation, the amount of information lost when one ring is skipped will be different. Further, according to the above formula, the throughput of the visual analyzer is determined.
The table can be used in 4 different orientations, depending on which the number of rings with one or another break position is different (Table 1).
Table 1
The position of the gap in the ring
Table Orientation	Number of rings with break direction (clockwise)	
	12	13	15	17	18	19	21	23	
1	71	76	77	88	81	84	83	100	
2	77	88	81	34	83	100	71	76	
3	81	34	83	100	71	76	77	88	
4	83	100	71	76	77	65	81	34	
When determining the throughput of the visual analyzer, the task is reduced to establishing how many rings the subject examined for one or another orientation of the table, as well as how many and with what direction of the break he missed.
Depending on the total number of rings with a certain orientation of the gap, the amount of information lost when one ring is skipped is different, which is determined from Table 2.
Table 2
Total number of rings with a specific fracture orientation	The amount of information lost when
skipping one ring	
71	2,736	
76	2,777	
77	2,780	
81	2,800	
83	2,808	
84	2,815	
88	2,835	
100	2,930	
The information that the table carries is 358.8 bits, which is easy to establish knowing that one ring carries information equal to 0.543 bits, and there are 660 rings in the table (0.543  660 = 358.8).
Having established the number of skipped rings of certain orientations and knowing the amount of information lost when one ring is skipped, it is possible to determine the total amount of information lost per unit of time using the formula:
where:
S is the bandwidth of the visual analyzer in bps
358.8 - the amount of information in the table;
n is the number of missed rings of a certain orientation;
X is the amount of information lost when the ring is skipped;
T is the time taken to view the table in seconds. - the amount of information lost when skipping ring

Schulte table.
 Schulte's technique is one of the effective ways to assess the concentration of attention of workers, students, the state of their mental stability.

RED-BLACK TABLES OF GORBOV-SHULTE.

The Gorbov-Schulte table, which is made in such shades, is used by psychologists, psychophysiologists and other specialized specialists who give an opinion on a person’s abilities in terms of quick reaction and increased concentration of attention.
Such matrices are used to check future air traffic controllers, pilots, subway and ground train drivers, and some other workers. Such a table usually has a size of 7x7 cells and contains randomly located black and red numbers (the first contains from 1 to 25, the second - from 1 to 24). In this case, the color indicator can be expressed in two ways: either the numbers themselves or the cells can be colored in red or black (the numbers in the second case are printed in white).
Tables are widely used for testing:
• volume of attention;
• speed of brain switching from one process to another.
For this purpose, matrices are used not only in educational institutions and clinics (there they are in demand among neuropathologists and psychiatrists), but also in some industrial enterprises. Successful completion of such a test is a condition for admission to work for representatives of certain professions.
The Gorbov-Schulte table or simply the Schulte table is one of the most popular tests for assessing the speed of switching attention. It is given by psychologists to conclude suitability for professions that require increased concentration and quick response, such as air traffic controllers, train drivers. Red-black Gorbov-Schulte tables are a modified version of one-color Schulte tables, which are a square divided into 49 7 * 7 cells. Numbers are randomly placed in the cells - from 1 to 25 are black, and from 1 to 24 are red. Colors can be specified in various ways. For example:

Cell background color:

Procedure: The subject is asked to indicate black numbers in ascending order, and red numbers in descending order. The numbers from each color group must be indicated in turn - first 1 black, then 24 red, 2 black -> 23 red -> 3 black -> 22 red, etc.
Evaluation of switching and distribution of attention. Can be used to examine children and adults.
          Order of conduct:
The study is carried out using special forms, on which there are 25 red and 24 black numbers. The subject must first find the black numbers in ascending order, then the red numbers in descending order.
The third task is to alternately search for black numbers in ascending order and red numbers in descending order. The main indicator is the execution time.
The first two tasks are performed using one form, the third task - on another form.
            Instructions for conducting:
For adults: “There are 25 red and 24 black numbers on your form. You must find the black numbers in ascending order (from 1 to 24) and then the red numbers in descending order (from 25 to 1). Each time you find the number you need, write down the letter corresponding to that number.
The execution time of the task is fixed.
           Second instruction: “Take the second form. Now you have to look for red numbers in descending order and black numbers in ascending order at the same time, alternately. For example: red number 25, black number 1, red number 24, black number 2 and so on.
The letters corresponding to the red numbers are written in one row (top), and the corresponding black numbers are written in the other (bottom), thus two rows of letters are obtained.
          Children's version: “On this table, the red numbers from 1 to 24 and the black numbers from 1 to 25 are not in order. You must show and name black numbers in ascending order, and red numbers in descending order at the same time, in turn: 1 - black, 24 - red, 2 - black, 23 - red and so on.
         Test material:

Processing test results.
The execution time of each series and errors are taken into account. The time for completing the third task is not equal to the sum of the times spent on completing the first and second, since part of the time is spent on switching attention and promptly keeping the numbers just named in the head. The difference between the two time indicators will be the time to switch attention from one series of numbers to another. The smaller this difference, the better the switching of attention.
           Types of errors: skipping a number, repeating the same number twice, and so on.
The children's version of the red-black table can be used after the subject was offered the Schulte tables, since this makes it possible to compare the results of the two methods with each other.
Data processing in the children's version is similar to the processing of the adult version. For comparison, the average time for completing tasks in the Schulte method and the fixed time for working with the Gorbov table are taken. The difference between the two times will be the switching time of attention.
                                          Equipment for the experiment.
The experimenter and all subjects must have Schulte tables (in the appendix) with 25 black numbers (from 1 to 25) and 24 red numbers (from 1 to 24). The numbers are scattered around the table in such a way that the ordinal numbers are at the maximum distance from each other. Each number has its own symbol - the letter of the Russian alphabet, written next to the number (for example, 24a, 25b, etc.). The experimenter prepares a program of correct answers in advance. To record the time of the task, the experimenter needs a stopwatch. To register the results of the experiment, each subject, before the start of the experiment, draws up a protocol table.
The experimenter fixes the time to complete the task at each stage.
Interpretation of results:
1. Check the subject's notes by comparing them with the experimenter's control notes.
2. Calculate the number of correctly found numbers (m) at stages I, II and III of the task separately for black numbers and red numbers.
3. Determine the execution time for the procedures for finding black and red numbers separately at the III stage of the task (T); for this, the total time spent on the entire stage must be divided in half.
4. Determine the selection speed (S) at stages I, II and III; and in the latter case separately for black and red numbers.
5. Find the conditional indicator of switching attention (P) according to the formula separately for red and black numbers.
As experience shows when examining patients suffering from aphasia, in addition to these characteristics, it is useful to take into account one more indicator - the number of attempts to correctly search for rows of numbers. This is achieved by the fact that if an error occurs, the subject is asked to start working with this table again. Attempts are repeated until the task is successfully completed.
The analysis of the results is carried out by estimating the total time of searching for red and black numbers separately and in alternating order, and then calculating the difference between both times. This difference, as is commonly believed, reflects the time it takes a person to switch attention.

Norms:
Distribution of attention: black numbers - 49 seconds, red numbers - 51 seconds.
Switching attention: 140 sec.
Norm in terms of 100 digits:
- search time for numbers printed in a regular font - 11 ± 1 s;
- search time for numbers printed in bold type - 10 ± 2 s;
- the time of sequential search for both - 41 ± 4 s.2.2. New pedagogical technologies used in the lesson: work in small groups, "cluster", testing.
2.3. Forms of control of knowledge, skills
- oral control
- written control
- test control
-quality of independent work
-quality of study protocols

4. PRACTICAL PART
1. Determining the speed of switching attention using Gorbov-Schulte tables
Algorithm of actions in steps:
- to instruct the examinee
- the researcher turns on the stopwatch. The subject finds 1-25 black numbers in ascending order and at the same time 24-1 red numbers in descending order (for example, 1 black, 24 red, etc.).
-record the time taken to find the numbers.
- measurements are taken at the beginning and end of the session
                          
               4. ANALYTICAL PART
4.1. New pedagogical technologies - "CLUSTER"
Brainwork

Research methods

  Indicators of the functional state of the body

4.2 Tests
1. Give 3 main characteristics of mental labor of hygienic significance:
A. tension of attention *
B. the need for a quick response to external stimuli *
B. auditory analyzer voltage
G. increased tactile sensitivity
D. vision analyzer voltage *

2. Name 3 tests for assessing the functional state of the body during mental work:
A. respiratory rate
B. chronoreflexometry *
B. Proofreading Samples *
G. thermometry
D. tremometry *

3. Highlight 3 main elements of checking the latent period of reactions in response to light or sound stimuli:
A. Pressing the button of the chronoreflexometer by the subject *
B. chronoreflexometer control button
B. give a stimulus and determine the reaction time *
D. assess the degree of fatigue by the response time of the respondent
E. Assessing the degree of fatigue by comparing the dynamics of indicators *

4 Name 2 indicators that determine the functional state of the central nervous system, which can be determined using correction tests:
A. work speed *
B. quality of work
B. attention indicator *
G. reaction time
D. degree of object differentiation

5. Name 3 steps to determine the stability of clairvoyance:
A. Place the Landolt ring at a distance of 2 m from the subject *
B. Setting the exact scan time
B. Determination of the time of inability to see clearly *
D. Calculation of net visual stability in % *
E. assessment of net visual stability index in comparison with the standard

6. Specify at least 3 psycho-physiological factors affecting employees:
A. prerequisite for work *
B. irrational mode of work and rest
B. lack of mechanization and automation
D. lifting and transporting goods *
D. tension of some participants *
7. Name 3 recreational activities to prevent the impact of psychophysiological factors:
A. introduction of additional breaks
B. mechanization and automation of labor *
B. rationalization of the workplace *
D. provision of special meals
E. use of psychiatric rooms

3.3. SITUATIONAL TASKS.
1. At the electric lamp plant, physiological tests are carried out to develop the most appropriate mode of operation and measures that justify the introduction of the necessary regulated additional breaks. Conveyor workers are exposed to noise and have a high level of nervous tension. In 90% of the working day, workers sit and work and uniform movements are observed. What physiological tests they should conduct.
2. To assess the functional state of the central nervous system of workers, a correction test and chronoreflexometry were performed. The selected styles are correct. What does it take to keep it?
3. To assess the dynamics of students' working capacity during the day, their CNS, cardiovascular system and neuromuscular system were examined. Do you think these checks are enough? If not, what other checks should be added.

                                            5. SECURITY QUESTIONS
1. What types of labor activity do you know?
2. What physiological changes occur in the body during mental work?
3. The concept of fatigue, its causes and prevention
4. What is severe fatigue and how to prevent it
5. The value of the scientific organization of labor in the prevention of fatigue.
6. What methods of assessing the severity and complexity of mental work do you know?
7. Methodology for assessing the ability to mental work (reading tables, solving simple arithmetic examples)
8. How is the stability of clear vision determined?
                                   
6.Recommended literature
Main:
1. Hygiene. Ed. Rumyantsev G.I. - M., 2001
2. Hygiene. ed. Demidenko N.M. - Tashkent, 2001
3. Rumyantsev G.I., Kozlova T.A., Vishnevskaya E.P. Guide to laboratory studies in hygiene. - M., 1980
3.Solihuzhaev S.S. Hygiene. - Tashkent, 1993
4. Solikhodzhaev S.S. Guide to practical exercises in hygiene. - Tashkent, 1996
5. Umumiy hygiene bilan ecology. Amaliy mashgulotlar uchun. Ukuv kullanma. Ponomareva L.A., Kazakov E.K., Abdukodirova L.K. etc. - Tashkent, 2011.-199p.
6. Training manual for the development of practical skills of a medical and preventive profile. - Tashkent, 2003

Additional:
7. Rumyantsev G.I., Vorontsov M.P. General hygiene. - M., 1990.
8. Babov D.M., Nadvorny N.N. Guide to practical exercises in hygiene with the technique of sanitary and hygienic research.-M., 1981
9. Training manual for the development of practical skills. Ed., Ponomareva L.A., Tashkent. 2003.
10. Textbook for preparing for practical classes in general hygiene with ecology (electronic version) (for students of medical, medical-pedagogical, medical-preventive faculties and the faculty of nursing of higher qualification)
11. D. I. Kicha, N. A. Drozhzhina, and A. V. Fomina. General hygiene. Guide to laboratory studies. - M., GEOTAR, Media - 2009.-288s.
12.P. I. Melnichenko, N. I. Prokhorov, V. I. Arkhangelsky and others.
General hygiene, socio-hygienic monitoring: a guide to practical exercises. - M., 2014 .- 316s.