Primary Visual and Visual Association Cortex (Areas 17, 18, 19)
Main Text
Location and Boundaries
Location
Boundaries
- • Medial: Parietooccipital sulcus
- • Ventral: Preoccipital notch
- • Lateral: Arbitrary line connecting preoccipital notch and superior extent of parietooccipital sulcus
- • Surrounded by superior parietal lobule (area 7), posterior cingulate cortex (area 30), inferior temporal gyrus (area 20), fusiform gyrus (area 37), and angular gyrus (area 39)
Function
Vision
- • Edge detection
- • Orientation selective
- • Perception of motion
- • Color perception
- • As visual information progresses down visual processing streams (i.e., “where” or “how” path from areas 17, 18, and 19 into parietal cortex and “what” path from areas 17, 18, and 19 into temporal cortex), binding of visual features into single coherent percept occurs
- • Retinotopic map exists in primary visual cortex (area 17), and similar maps exist in association visual cortex (areas 18 and 19)
Structural Connections
Cortical
- • Superior parietal lobule (areas 5 and 7) via cingulum
- • Temporal pole (area 38), anterior inferior temporal gyrus (area 20), anterior middle temporal gyrus (area 21), and parahippocampal gyrus (areas 28, 35, and 36) via inferior longitudinal fasciculus
- • Inferior frontal gyrus (areas 44, 45, and 47), orbitofrontal cortex (area 11), and frontal pole (area 10) via inferior frontooccipital fasciculus
Functional Connections
Coactive Regions
- • Supplementary motor area (area 6)
- • Premotor cortex (area 6)
- • Frontal eye fields (area 6)
- • Anterior cingulate cortex (areas 24, 32, and 33)
- • Superior temporal gyrus (area 22)
- • Inferior frontal gyrus (areas 44, 45, and 47)
- • Fusiform gyrus (area 37)
- • Cerebellum
- • Thalamus
- • Intraparietal sulcus (areas 5 and 7)
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VISUAL CORTEX: LOCATION AND COACTIVATION


VISUAL CORTEX: FUNCTIONAL CONNECTIVITY


FUNCTIONAL CONNECTIVITY TO VISUAL CORTEX

VISUAL CORTEX: LOCATION AND SUBREGIONS






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