29 Brain & Behavior III

Question 1

What types of effects are seen with:
Dmg to PRIMARY areas
Dmg to ASSOCIATION areas

Answer 1

Dmg primary areas = SPECIFIC effects

Dmg association areas = COMPLEX effects

Question 2

What does dmg to V1 cause?

Answer 2

Scotoma = permanent HOLE in visual field, brain does not fill this in

Question 3

What does injury/removal of V1 on ONE SIDE cause?

Answer 3

Hemianopia on OTHER side

eg. remove LEFT V1 = no vision on RIGHT side

Question 4

What is hemiplegia

Answer 4

PARALYSIS of ONE side of body

Question 5

What causes hemiplegia

Answer 5

Dmg to the CONTRALATERAL MOTOR cortex

eg. dmg RIGHT motor cortex = LEFT paralysis

Question 6

Paralysis in hemiplegia is WORST at what body parts?

Answer 6

Hemiplegia worst at EXTREMITIES

Question 7

Are there more PRIMARY or ASSOCIATION areas?

Answer 7

> 75% of cortex = ASSOCIATION areas

Question 8

What is visual AGNOSIA

Answer 8

Unable to identify FAMILIAR objects

“Don’t know what they are looking at”

Question 9

What kind of dmg can cause visual AGNOSIA?

Answer 9

Occipital cortex (V1)
Parts of temporal + parietal lobes

Question 10

What happens when people with visual AGNOSIA are asked to COPY DRAWINGS

Answer 10

Can replicate PARTS of pictures, cannot integrate as a WHOLE

Question 11

What is Prosopagnosia?

Answer 11

Inability to recognise FACES

Question 12

2 types of prosopagnosia?

Answer 12

1. Can’t recognise FAMILIAR faces
2. Can’t recognise a face as a FACE
   = CONTINUUM of severity

Question 13

Damage to what BRAIN AREA causes prosopagnosia?

Answer 13

FUSIFORM gyrus (temporal+parietal lobes)