SU1311709A1 - Apparatus for estimating intersemisphere asymmetry of man - Google Patents

Abstract

The invention relates to medical technology and can be used in psychophysiological studies. The purpose of the invention is to obtain a quantitative assessment of human hemispheric asymmetry. The device contains sequentially co. a single frequency control unit 1, a generator of 2 rectangular pulses, a frequency meter 3, a recorder 4 with a marker button 5. The input of the switch 6 is connected to the output of the generator of rectangular pulses. The input of the test flicker source 7 is connected to the switch 6 output. The study is repeated separately for the right and left half of the visual fields and the difference in the critical flicker frequency characteristic of the half of the visual fields assesses the hemispheric functional asymmetry of the subject's brain, as well as the degree fatigue man. 1 il. (L S LO

Description

113

The invention relates to medical technology and can be used in psychophysiological studies and in tests investigating operator fatigue.

The purpose of the invention is to obtain a quantitative estimate of the inter-hemispheric asymmetry by measuring and comparing the difference in the flicker focal frequency difference (ccsm) of the left and right fields of vision in both human eyes.

The drawing shows a block diagram of the proposed device.

The device for estimating the inter-hemispheric asymmetry of a person contains a series-connected frequency control unit 1, a generator of 2 rectangular pulses, a frequency meter 3, a recorder 4 with a button 5 of the marker, and a switch 6 whose input is connected to the output of a generator of rectangular pulses and the source 7 of test flickers The input of which is connected to the output of the switch 6 is made in the form of an opaque housing 8, a source of constant light radiation 9, two pulsed sources of light 10, two oculi 11.

The device works as follows.

Prior to examination, the subject is instructed to fix the vision during the examination at the source 9 of constant light radiation.

The oculars 11 of the source 7 of the test flashes are located at the level of the subject's eyes.

In the right and left half of the fields of view of both eyes of the subject, pulsed sources of 1 O light are installed.

The frequency control unit 1 generates a signal that linearly changes the frequency of the generator 2 rectangular pulses, which through the switch 6 initiates pulsed light sources (each of them is tested by P. Geresi

Compiled by D.Nikolaev Tehred M.Hodanich

1911/4

Circulation 596 Subscription

VNIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raupshka nab., d.4 / 5

Production and printing company, Uzhgorod, Projecto st., 4

92

SRI only one). The signal from the square pulse generator is also fed to the input of the frequency meter 3 connected to the recorder 4 and the button

5 markers.

At the moment when the flashes are flicked, the subject presses the marker button 5, fixing the frequency of the flashes of the right or left half of the visual fields. The test is repeated separately for the right and left fields of vision and the difference in ccsm characteristic of the half of the visual fields assesses the severity of hemispheric functional asymmetry of the brain of the subject.

and the degree of fatigue of the subject.

Invention Formula

A device for assessing hemispheric asymmetry of a person, containing a series-connected frequency control unit, a square pulse generator, a frequency meter, a recorder with a marker button, and a source of test flashes, due to the fact that, in order to quantify the half hemispheric asymmetry by measuring and

comparing the difference in the critical frequency of the flicker of the left and right fields of view of both human eyes, it additionally contains a switch, the input of which is connected to the output

35 square pulse generator. and the output with a test flicker source, the test flicker source is made in the form of an opaque case with two oculi and a source of constant light radiation installed inside the case and two pulsed light sources installed in the plane formed by the centers of the oculars and the source

 constant light radiation, with pulsed sources mounted with the possibility of moving relative to the source of constant light RADIATION.

Proofreader A.T. sko

Claims (1)

Claim A device for evaluating interhemispheric asymmetry of a person, comprising a frequency control unit, a rectangular pulse generator, a frequency meter, a recorder with a marker button, and a source of test flickers, characterized in that, for the purpose of quantifying the hemisphere asymmetry by measuring and comparing the difference in the critical frequency merging flickers of the left and right fields of vision of both human eyes, it additionally contains a switch, the input of which is connected to the output of the rectangular generator of pulses and the output with a source of test flickers, the source of test flickers is made in the form of a lightproof casing with two eyepieces and a source of constant light radiation installed inside the case and two pulsed light sources installed in the plane formed by the centers of the eyepieces and a source of constant light radiation, and pulsed sources are installed with the possibility of movement relative to the source of constant light radiation.