Sustained attention-related activity in primary visual cortex
نویسندگان
چکیده
منابع مشابه
Spatial attention affects brain activity in human primary visual cortex.
Functional MRI was used to test whether instructing subjects to attend to one or another location in a visual scene would affect neural activity in human primary visual cortex. Stimuli were moving gratings restricted to a pair of peripheral, circular apertures, positioned to the right and to the left of a central fixation point. Subjects were trained to perform a motion discrimination task, att...
متن کاملAttention-regulated activity in human primary visual cortex.
Effects of attention to a local contour of a moving object on the activation of human primary visual cortex (area V1) were examined. Local cerebral oxygenation changes (an index of neuronal activity) in human area V1 were measured with functional magnetic resonance imaging (fMRI) in conditions including the following two: 1) when attention was selectively directed toward one side of a moving we...
متن کاملCommentary Attention and primary visual cortex
Evidence for attentional modulation of responses in primary visual cortex has been a matter of considerable debate. The classical notion concerning attention effects in visual cortex has held that the strongest effects are seen at the highest levels of the visual pathway, and that in primary visual cortex there is no effect of attention. The report by Somers et al. (1) of a functional MRI study...
متن کاملThe role of parietal cortex during sustained visual spatial attention.
The control of spatial attention-shifting attention between visual field locations or sustaining attention to one location-involves the prefrontal cortex and parietal cortex. Within the parietal cortex, shifting attention has been linked to the superior parietal lobule; however, the neural substrates associated with sustained attention are still unknown. In the present fMRI study, we aimed to i...
متن کاملPopout modulates focal attention in the primary visual cortex.
The influence of context-dependent interactions on attention-related neural activity was studied in the human primary visual cortex (V1) with event-related fMRI. Retinotopic field-sign mapping was used to determine the localization of V1 with respect to adjacent retinotopic areas. Observers reported the orientation of a Gabor patch at pre-cued extrafoveal locations when it was salient among dis...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2010
ISSN: 1534-7362
DOI: 10.1167/3.9.179