Abstract:
:With the purpose of elucidating the functional fields involved in the discrimination of visual form based either on luminance or binocular disparity cues, we used PET to measure changes in regional cerebral blood flow (rCBF) in ten volunteers while they performed visual discrimination tasks. The averaged standardized subtraction images (delta rCBF) were analysed for statistically significant changes between the form tasks and their reference tasks. Twenty cortical fields in the visual association areas and the prefrontal cortex were engaged by the discrimination of visual form based upon disparity cues, whereas only four fields showed increased activity during the discrimination of visual form created by luminance cues. The only functional field activated in both conditions was in the left fusiform gyrus. The present findings extend our earlier observations, namely that disparate functional networks of activated fields in the human brain can perform the discrimination of visual form perceptually defined by different visual cues.
journal_name
Neuroreportjournal_title
Neuroreportauthors
Gulyás B,Roland PE,Heywood CA,Popplewell DA,Cowey Adoi
10.1097/00001756-199411000-00039subject
Has Abstractpub_date
1994-11-21 00:00:00pages
2367-71issue
17eissn
0959-4965issn
1473-558Xjournal_volume
5pub_type
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