Chapter 5 - Occipital Lobes Flashcards
1
Q
What are the anatomical divisions of the occipital lobes?
A
- Brodmann’s area 17-19 OR
- Striate, parastriate and peristriate
2
Q
Occipital lobe function
A
- vision
- spatial mapping of the world
3
Q
Primary visual cortex
A
- visual sensation (points of light, simple forms)
- completion
4
Q
What does damage to the primary visual cortex result in?
A
- cortical blindness/loss of vision, depending on extent of damage, the entire visual field can be impaired
5
Q
Secondary visual cortex
A
- perception - interpret the assembled visual sensations from primary cortex into meaningful percepts
- pass perceptual info to the tertiary association cortex
6
Q
What does damage to the secondary visual cortex result in?
A
- perceptual impairment/distortion
- inability to perceive contours, magnitude, orientation, depth, etc.
- stimuli might repeat itself
7
Q
What is a scotoma?
A
small area of damage/lesion that the brain fills in visually
8
Q
Blindsight
A
- visual responsiveness despite reporting blindness (EX: pointing to shapes and turning head to light)
- visual pathway outside of occipital lobe that still operates when occipital lobe is damage
- unaware of how they are performing
9
Q
Helen the monkey
A
- demonstrated blindsight
- entire occipital lobe was removed
- could navigate obstacles and find objs
10
Q
Prosopagnosia
A
inability to recognize faces
11
Q
Who was Dr. P?
A
- music professor who began to only ID students by voice and not their face
- visual hallucinations
- tumor in visual pathway
- tested by neuropsych Dr. Sachs
