Human cortical processing of colour and pattern.

Abstract:

:The present study investigates human visual processing of simple two-colour patterns using a delayed match to sample paradigm with positron emission tomography (PET). This study is unique in that we specifically designed the visual stimuli to be the same for both pattern and colour recognition with all patterns being abstract shapes not easily verbally coded composed of two-colour combinations. We did this to explore those brain regions required for both colour and pattern processing and to separate those areas of activation required for one or the other. We found that both tasks activated similar occipital regions, the major difference being more extensive activation in pattern recognition. A right-sided network that involved the inferior parietal lobule, the head of the caudate nucleus, and the pulvinar nucleus of the thalamus was common to both paradigms. Pattern recognition also activated the left temporal pole and right lateral orbital gyrus, whereas colour recognition activated the left fusiform gyrus and several right frontal regions.

journal_name

Hum Brain Mapp

journal_title

Human brain mapping

authors

Barrett NA,Large MM,Smith GL,Michie PT,Karayanidis F,Kavanagh DJ,Fawdry R,Henderson D,O'Sullivan BT

keywords:

subject

Has Abstract

pub_date

2001-08-01 00:00:00

pages

213-25

issue

4

eissn

1065-9471

issn

1097-0193

journal_volume

13

pub_type

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