Occipital Lobes Flashcards
What is the name of the vision received by the fovea?
Macular vision
What divides the occipital lobe between upper and lower visual fields?
The calcarine sulcus
What is area V1 of the occipital lobe?
Primary visual area
What is the primary visual area responsible for?
First processing level of visual hierarchy; processes color, form, and motion
What will a bilateral lesion of V1 cause?
Cortical blindness
What structure does the primary visual area receive most of its input from?
Lateral geniculate nucleus of thalamus
Where does the primary visual area project to?
All other regions of the occipital lobe
Anton’s syndrome (n.)
the state of being unaware of being cortically blind
What is the Brodmann area for the primary visual area?
Brodmann area 17
What area is the second level of the visual hierarchy?
V2
Where is V2 in relation to the primary visual area?
Immediately adjacent to V1
What does V2 process?
Color, form, and motion
Where does V2 project to?
V3 and V5
What does V3 process?
Perception of the form of objects in motion, and conscious awareness of movement
What Brodmann area does V2 occupy?
Brodmann area 18
What is V3?
A secondary visual processing area that integrates input from V1 and V2
What is V2?
A primary visual processing area that begins visual integration
What is area V4 of the occipital lobe?
A secondary visual processing area
What does V4 process?
Color, as well as some processing of form
Where does most of the input to V4 come from?
The primary visual area (V1)
What does damage to V4 cause?
Achromatopsia (inability to see color)
What is area V5 of the occipital lobe?
A secondary visual processing area
Where does most input to V5 come from?
V1
What information does V5 process?
Perception of objects in motion
What does a lesion of V5 cause?
Inability to consciously perceive movement (e.g. can see stationary objects but not pouring water)
What area of the occipital lobe is referred to as MT?
V5 (as it borders on the medial temporal lobe)
What Brodmann area contains V3, V4, and V5?
Brodmann area 19
What is the geographic name for the dorsal visual stream?
Occipitoparietal stream
What is the ventral visual steam involved in?
Identification of faces, body parts, or entire moving bodies; analysis of appearance and layout of visual scenes
What is the dorsal visual stream involved in?
Movement of eyes involved in tracking motion, objected-directed grasping, conveys info about movement and action
egocentric space (n.)
area of control of one’s movements in relation to objects
allocentric space (n.)
area involving the relationships among all the features of one’s environment
What is the specialized structure in the ventral visual stream that recognizes faces?
Fusiform gyrus
What is the fusiform gyrus responsible for?
Recognition of faces
What is the geographic name for the ventral visual stream?
Occipitotemporal stream
prosopagnosia (n.)
inability to recognize or distinguish faces
