The Hebrew University of Jerusalem

Ehud Zohary

Professor

Welcome to Ehud Zohary’s Lab. Our research is focused on how our brain generates a representation of the world around us, combining incoming perceptual information with memory-based expectations (of what it should be), to act on it. Consider the demo you’ve just seen,  showing a visual scene, typical scanning patterns, and the image generated on your retina. The visual image is heavily blurred in the periphery. We therefore constantly scan the visual scene with our eyes. thereby generating a novel retinal image with every new eye movement. Incredibly, our brain seamlessly generates a stable representation of the visual scene in spite of this jerky and incomplete visual information. This perceptual stability is so robust that we live in an illusion that we see everything at the highest precision all at once. In our labraory  we conduct experiment trying to gain further understanding of the phenomenon.

We are also interested in understanding changes in cortical representations. For example: how do the blind construct a world image? What happens to their “visual” cortex? How does our brain generate a body image? how does it change following amputation? Learn more about this and other projects.

 

What do we study? (one example)

The visual image is heavily blurred in the periphery (the fovea, a region with highest visual acuity, is limited to the central ~2 degrees of the visual field). One of our means to compensate for this limitation is to constantly scan the visual scene, making about 3 saccades in a second, thereby generating a novel retinal image is changing with every new eye movement. Incredibly, our brain seamlessly generates a stable representation of the visual scene in spite of this jerky and incomplete visual information. This perceptual stability is so robust that we live in an illusion that we see everything at the highest precision all at once.

How does our brain perform this?

Zohary-web1Zohary-web2

Recent publications

2016

2015

2011

Contact information

Phone: +972-2-6586737
Fax: +972-2-6584985

Department of Neurobiology
Alexander Silberman Institute of Life Sciences
Hebrew University of Jerusalem
Jerusalem 9190401
Israel 

Websites