cerebrum and limbic system

Question 1

Cerebral cortex-

4 general considerations, name them.

Answer 1

• 3 types of functional areas
• hemisphere focused contractually
• conscious behavior requires entire cortex
• each hemisphere has own function

Question 2

Broadman’s numbers 6 numbers (some are grouped) name them and the region they are associated with.

Answer 2

4- frontal cortex
8- frontal eye field
6- premotor cortext
44,45- brochos
3,1,2-post central gyrus
22- wernickes
17- visual cortex

Question 3

Cerebral arteries, where do they supply blood?

- MCA, PCA, ACA

Answer 3

MCA= supplies lateral surface of frontal, parietal and upper temporal lobes (think of possible lesions)
ACA= middle parts of frontal/parietal lobe and corpus collusum
PCA= occipital lobe, lower temporal lobe and midbrain

Question 4

Cerebrovascular disorders - 2 different ways it can occur, describe each.

Answer 4

thrombotic= local event, region is pale
embotic= traveling clot, red looking

Question 5

Cerebrovascular disorders - Hemorrhages
Describe each
i)epidural
ii)subdural
iii)subarachnoid
iv)intracerebral

Answer 5

i) trauma, talk and die sydrome
ii) vein rupture, due to trauma
iii) aneurism due to weak blood vessels, most common in ant. communicating artery
iv) hypertension, due to trauma

Question 6

Frontal lobe - Function, brodman numbers, what does the prefrontal lobe do?
4 problems when a lesion occurs.

Answer 6

controls movement and complex thinking.
Brodmans= 4, 6, 8, 44, 45 (frontal, premotor cortex, eye field, brocas)
Prefrontal= emotional aspects of behaviour, lesions lead to lack of initiative, insight and perspective
4 lesions:
apathy, slow speech, decreased participation in social interactions, aphasia (brocos, speech issues, broken mouth)

Question 7

Parietal Lobe

i) associated brodmans areas
ii) what type of info?
iii) Results of lesions 6 different things

Answer 7

brodmans 3,1,2. wernickes is 22, visual cortex 17, temporal lobe 41, 42

sensory info only.
Lesions:
i)Asterognia= cannot recognize object by touch
ii)receptive aphasia= cannot understand what you are saying (wernickes)
iii)gerstmann syndrome= 39, alexia- cannot comprehend written language or write it (agraphia)
iv)conduction aphasia, cannot repeat words
v)transcorical apraxia, lesions of corpus callosum
vi)asomatognosia= unaware of contralateral half of body

Question 8

Limbic system- What are the 4 main functions and give 4 problems if lesions occur

Answer 8

incharge of sex drive, visceral smell, memory and learning, behavior and emotions.

Lesion= loss of smell
anterograde amnesia= cannot form new memories
kluver-bacy syndrome= placidity: the person is very chill, psychic blindness: don’t express anticipated response to stimulus , hypermetamorphis: everything is new to you and loss of sexual preference