by Igor SHEVELYOV, Academy Member, Head, Laboratory of Physiology of the Sensory Systems, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences Recognition of visual images is one of the most complex functions of the brain. How and why does it differentiate between the images projected on the retina of the eye? Significant progress in understanding of these operations was made in recent years, though much more things still remain unknown. However, due to new methods of investigation we now can see the contours of a harmonious system of analysis of image signs and their synthesis in a single visual image. What do we know about the neuronal mechanisms of the object shape perception in different compartments of the visual system? Let us start from the retina of the eye, whose structure and functions are studied most amply; vision is impossible without it. But aren't the previous concepts on its complexity and significance of its functions, linked with visual information processing, and not reception*, exaggerated? Let us take, the traditional assumption "the retina is part of the brain presented at the periphery". Is it so? Comparison of the signal processing and transformation in the retina and in the exterior geniculate body (subcortical visual center), * Reception is perception of the stimulant's energy by receptors and its transformation into nervous stimulation. - Ed. стр. 19 In each of the three blocks: upper series: images presented to the cat's eye; lower series: computer-reconstructed relief of neuronal activity in the external geniculate body for charges of 177 neurons. Scheme of horizontal inhibition (A) and its effect (B). on the one hand, and in the brain cortex, on the other, demonstrates their obvious difference. It is well known that transduction (photoenergy transformation into nervous stimulation energy, paralleled by tremendous amplificat ... Read more

Эта публикация была размещена на Либмонстре в другой стране и показалась интересной редакторам.

Полная версия:
Точикистон Онлайн · 1817 days ago 0 2949
Professional Authors' Comments:
Order by: 
Per page: 
  • There are no comments yet
Library guests comments

0 votes
Точикистон Онлайн
Душанбе, Tajikistan
10.10.2018 (1817 days ago)
Permanent link to this publication:

Library Partners

LIBRARY.TJ - Digital Library of Tajikistan

Create your author's collection of articles, books, author's works, biographies, photographic documents, files. Save forever your author's legacy in digital form.
Click here to register as an author.

Chat for Authors: TJ LIVE: We are in social networks:

About · News · For Advertisers

Digital Library of Tajikistan ® All rights reserved.
2019-2023, LIBRARY.TJ is a part of Libmonster, international library network (open map)
Keeping the heritage of Tajikistan


US-Great Britain Sweden Serbia
Russia Belarus Ukraine Kazakhstan Moldova Tajikistan Estonia Russia-2 Belarus-2

Create and store your author's collection at Libmonster: articles, books, studies. Libmonster will spread your heritage all over the world (through a network of branches, partner libraries, search engines, social networks). You will be able to share a link to your profile with colleagues, students, readers and other interested parties, in order to acquaint them with your copyright heritage. After registration at your disposal - more than 100 tools for creating your own author's collection. It is free: it was, it is and always will be.

Download app for Android