Brodmann's
Interactive Atlas
AREA
18
(Secondary
visual cortex -
Middle occipital gyrus)
Associated
Functions
- Visual
- Memory
- Language
- Other
- Horizontal saccadic eye movements (9345475)
- Response to emotion/attention in visual processing
(Right) (10468363,
18502045)
- Visual mental imagery (Left) (9117371)
Reviewer's note
Damage in BA18/19 is associated with visual agnosia, which can have
different manifestations (e.g., object agnosia, face agnosia, color
agnosia, topographical agnosia, etc.). Functions observed in
neuroimaging studies include no only the detection of basic visual
parameters (e.g., detection of light intensity, feature attention,
detection of patterns, etc.), but also the area's participation in the
“confrontation naming circuitry” (confrontation naming
activates BA18/19/37 plus the inferior frontal gyrus). Damage in the
left may be associated with pure alexia. It is not surprising either
its
participation in “response to visual word form”. According
to functional studies it also participates in other visual related
functions such as visual priming and visual attention.