Patent RU-2193860-C1 (RU)
Title: Method for detecting alterations in system of carrying out visual afferentation in children
Inventor: NEBERA S A
IPC: A61B5/0484
Filed: 2001-05-28
Granted: 2002-12-10
Abstract: FIELD: medicine, clinical neurophysiology. SUBSTANCE: method deals with diagnostics of organic and functional alterations in the system of carrying out visual afferentation in children and youngsters. Registration of visual evoked potentials (VEP) is performed onto reversible chess-type pattern in case of monocular stimulation of eyes. At higher average value of latency between the values of latent periods of P100 components of left and right occipital branches being not distinct between each other more than by 6 msec, lower than by 4 ms against the upper border of the norm and/or higher average value of latency between the values of latent periods of P100 components of left and right occipital branches being not distinct between each other more than by 6 msec, lower than by 10 ms against average value of latency between the values of latent periods of P100 components of left and right occipital branches and/or lower amplitude of P100 component in occipital branch of one hemisphere to an amplitude of P100 component in occipital branch of another hemisphere by 2-2.6 times, and/or lower average amplitude value between amplitude values of P100 components of left and right occipital branches being not distinct between each other more than by 2 times, by 2-2.6 times against average amplitude value between amplitude values of P100 components of left and right occipital branches, and/or higher latent period of P100 component in occipital branch of one hemisphere being lower than by 10 msec against latent period of P100 component in occipital branch of another hemisphere one should conclude on functional alterations in the system of carrying out visual afferentation in children. In case of higher average value of latency between the values of latent periods of P100 components of left and right occipital branches being not distinct between each other more than by 6 ms, by 4 ms and more against the upper border of the norm, and/or higher average value of latency between the values of latent periods of P100 components of left and right occipital branches being not distinct between each other more than by 6 ms, by 10 ms and more against average values of latency between the values of latent periods of P100 components of left and right occipital branches at monocular stimulation of another eye, and/or lower amplitude of P100 component in occipital branch of one hemisphere by 2.7 times or more against an amplitude of P100 component in occipital branch of another hemisphere, and/or lower average amplitude value between amplitude values of P100 components of left and right occipital branches being not distinct between each other more than by 2 times, by 2.7 times or more against average amplitude value between amplitude values of P100 components of left and right occipital branches at monocular stimulation of another eye, and/or higher latent period of P100 component in occipital branch of one hemisphere by 10 msec and more against latent period of P100 component in occipital branch of another hemisphere one should conclude on organic alterations in the system of carrying out visual afferentation in children. EFFECT: higher accuracy of diagnostics. 2 ex