Lab 3 Limbic lobe and Brainstem

Question 1

what are the 2 major interconnections between the brain?

Answer 1

commissural fibers and association fibers

Question 2

what do the commissural fibers connect?

Answer 2

connect the 2 hemispheres of the brain

Question 3

what do the association fibers connect?

Answer 3

connect areas within the same hemisphere

Question 4

What are the main structures of commissural fibers?

Answer 4

corpus callosum and the anterior commissure

Question 5

what are the main structures of association fibers? And what do they do?

Answer 5

short association fibers
long association fibers
connect adjacent gyri

Question 6

what are the 4 long association fibers? And what do they do?

Answer 6

superior longitudinal fasciculus
uncinate fasciculus 
arcuate fasciculus 
cingulum 
they connect distant areas of the same hemispheres

Question 7

what fasciculus connects the Wernike’s to the Broca’s area?

Answer 7

Arcuate fasciculus. damage to this causes conductive aphasia’s

Question 8

what fibers run up and down to the cortex and come from the internal capsule?

Answer 8

corona radiata

Question 9

what structure lies just deep to the cingulate gyrus and runs from the frontal lone to the hippocampus and interconnects the prefrontal areas with the temporal lobe?

Answer 9

Cingulum

Question 10

what kind of functions does the cingulate gyrus have?

Answer 10

visceral motor functions

Question 11

what does the limbic system function in?

Answer 11

reward, empathy, memories and emotional responses

Question 12

what does the limbic lobe function in?

Answer 12

Declaritive memory -> facts (puts short term knowledge into long term memory/facts)

Question 13

what structures are part of the limbic lobe?

Answer 13

hippocampus, fornix (crus, body and columns), mamillary bodies and anterior thalamus

Question 14

damage to the limbic lobe or any structure within the limbic lobe would result in what?

Answer 14

anterograde amnesia (inability to create new memories, working memory still intact) -> extent will vary b/n unilateral and bilateral damage

Question 15

ascending and descending tracts (such as corticospinal etc) all travel within the (blank) limb of the internal capsule

Answer 15

posterior limb