week 7

Question 1

what is the corpus collusum

Answer 1

white structure in the middle of the brain with millions of axons that travel between hemispheres for communication

Question 2

where is the primary motor cortex located

Answer 2

on the precentral gyrus

Question 3

where is the primary sensory cortex located

Answer 3

on the post central gyrus

Question 4

layers of cerebral cortex

Answer 4

1. molecular layer
2. external granular layer
3. external pyramidal layer
4. internal granular layer
5. ganglionic layer
6. multiform layer

Question 5

what does ganglionic layer have

Answer 5

large cell bodies called betz cells

Question 6

what are betz cells

Answer 6

giant neuronal cell bodies that initiate movement, axon of these cells run down corresponding motor tracks

Question 7

brocas area

Answer 7

motor speech area- movement of laringeal muscles

Question 8

wernickes area

Answer 8

sensory speech area- comprehension of speech

Question 9

rhs blood supply origin

Answer 9

brachiocephalic artery splits into the right subclavian artery and the common carotid artery

Question 10

lhs blood supply origin

Answer 10

left subclavian artery and the comment left carotid artery come from the main arch of the aorta

Question 11

blood supply rhs

Answer 11

common carotid artery runs up the neck until c4 where it splits into the external carotid which supplies the face and neck and also into the internal carotid which continues on through the base of the skull and into the cranial cavity to supply the brain

Question 12

blood supply lhs

Answer 12

the vertebral artery passes through the transverse foramen and the foramen magnum onto the brainstem where it joins with the internal carotid to form the basillar artery

Question 13

anterior and middle cerebral arteries

Answer 13

come from the internal carotid artery.
middle supplies the larges amount of the lateral brain

Question 13

posterior cerebral artery

Answer 13

comes from the posterior basilar system

Question 14

middle cerebral artery path

Answer 14

its first segment will supply the basal ganglia ( cordate nucleus and putimen ) through terticulostrate arteries
sylvian tissue= 2 segment: upper and lower cortical branch

Question 15

anterior cerebral artery path

Answer 15

runs anteriorly away from the origin and winds itself around the corupus collosum called the pericallosal branch

Question 16

posterior cerebral artery path

Answer 16

runs posteriorly and gives off branches that supply the parietooccipital lobe

Question 17

brainstem and cerebellum blood supply

Answer 17

almost conpletely supplied by the vertebral basillar system
main arteries:
- superior cerebellar arteries
-anterior inferior cerebellar artery
-posterior inferior cerebellar artery

Question 18

end of spinal cord

Answer 18

tapers into conus medullaris
filum terminate anchors conus medullaris to the coccyx

Question 19

funinculus, tract, lemniscus

Answer 19

bundle of nerve fibres

Question 20

fasiculus

Answer 20

bundle of muscle fibres