week 5 lab

Question 1

caudal commissure

Answer 1

where cross over of pretectal neurons for PLR occur (left to right)

Question 2

tectum composed of

Answer 2

rostral colliculus and caudal colliculus

Question 3

rostral colliculus

Answer 3

lateral geniculate nucleus feed into rostral colliculus and riggers UMN for neck muscles for sight avoidance

Question 4

caudal colliculus

Answer 4

sound avoidance

Question 5

tegmentum

Answer 5

ventral portion; LMNs of CNN III and IV; UMN centers (3)

Question 6

crus cerebri

Answer 6

axons of neurons from the frontal lobe (the umn that lives in the frontal lobe)

Question 7

mesencephalic aqueduct divides midrbain into

Answer 7

dorsal poriton and ventral portion;

Question 8

dorsal portion is the

Answer 8

tectum

Question 9

ventral portion is the

Answer 9

tegmentum

Question 10

tegmentum contains

Answer 10

LMN of CN 5 and UMN center

Question 11

rostral medullary velum

Answer 11

thin membrane forming roof of 4th ventricle; decussation of CN IV in rsotral medullary velum

Question 12

obex is important in

Answer 12

prion disease

Question 13

peduncles on ventral surface of cerebellum

Answer 13

axons going into and out of cerebellum (middle caudal rostral; named on where they tie into the brainstem)

Question 14

transverse pontine fibers become

Answer 14

middle cerebellar peduncles

Question 15

vestibular trigone

Answer 15

vestibular n. information feeds in here (info from semicircular canals)

Question 16

vestibular nuclei live in

Answer 16

vestibular trigone

Question 17

what are the functions of vestibular nuclei

Answer 17

send axons down white matter of cord an talk to LMN (so it is an umn)
travel rostrally to talk to LMN of CN 3,4,6: fast phase clicking in direction of head turn (niastagmus)

Question 18

hearing from CN 8 travel into

Answer 18

cochlear nucleus

Question 19

lateral geniculate body _____

Answer 19

conscious vision relay

Question 20

medial geniculat body _____

Answer 20

conscious auditory relay

Question 21

brachium of rostral colliculus

Answer 21

connects rostral colliculus and lateral geniculat

Question 22

brachium of the caudal colliculus

Answer 22

connects caudal colliculus and medial geniculate

Question 23

what are the basal nuclei

Answer 23

caudate nucleus (head an dbody)
lenticular nucleas (lentiform nucleus)

Question 24

what is the fornix composed of

Answer 24

axons of hippocampus and parahippocampus

Question 25

basal nuclei function in

Answer 25

inhibitory to frontal cortex; fine motor ability control repsiration in primates (parkinsons disease)