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BAB Seminar, Dr David Field, University of Reading, 6 Dec 13

Date(s)
06/12/2013 (15:00-16:00)
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Description

Brain and Behaviour Seminar

Dr David Field, University of Reading

The influence of dietary flavonoids on visual funtion: observations and hypotheses

 

A number of fMRI studies of high‐level vision have reported selective focal activation in a dorso‐medial part of the superior parietal lobule (dmSPL). Each of these has attributed a different functional role to the region. Considering the studies as a group reveals that tasks activating  this  region  share  a  common  feature, which  was  not  apparent  to  the  study authors. The common feature is that tasks that activate the region strongly are ones where processing the changing visual distance between two objects is important for determining responses in a behavioural task, or where relative motion is a very salient feature of the stimulus. This suggests the hypothesis that dmSPL encodes the relative positions of, or visual angles between, objects. This type of information is of critical importance for the visual control of actions such as reaching to grasp an object or steering a car, but it is not explicitly represented in early visual areas. In this talk I will use the new hypothesis to re‐ interpret findings of previous studies, and present new fMRI data that supports the hypothesis.


   
 
 
 

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