Dual functions of sight demonstrated

The dissociation in the visual system between two separate theoretical functions has been demonstrated for the first time by scientists in Jerusalem.

Hebrew University researchers say the separate vision-related actions that enable humans to identify objects and to interact with them have been documented from the beginning of the 20th century in patients who suffered damage to their visual system in which one or the other function -- identification or action -- was damaged.

That dissociation suggests the existence of separate visual streams. However, despite wide research triggered by the concept, it had not been proved in subjects in whom both streams are functioning normally.

Now, using functional magnetic resonance imaging, Professor Ehud Zohary and a graduate student have been able to demonstrate dissociation between perception of objects and actions in the brains of healthy people.

An article detailing the findings appears in the journal Neuron.

Copyright 2006 by United Press International


Explore further

With tiny technological tweezers, researchers uncover new aspects of cell division

Citation: Dual functions of sight demonstrated (2006, March 6) retrieved 20 October 2019 from https://phys.org/news/2006-03-dual-functions-sight.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more