Ascending Cranial Pathways

Question 1

CN V

Answer 1

trigeminal nerve

Question 2

trigeminal nerve

Answer 2

all somatosensory of headproprio, vib, fine touchpain, temp, crude touchalso motor to mastication muscles

Question 3

opthalmic nerve

Answer 3

V1sensory

Question 4

maxillary nerve

Answer 4

V2sensory

Question 5

mandibular nerve

Answer 5

V3sensory and motor

Question 6

dermatomes of trigeminal

Answer 6

V1 - nose and upper foreheadV2 - bottom nose to lipsV3 - chin to temple

Question 7

ganglia for cranial nerves

Answer 7

named nuclei

Question 8

mesencephalic nucleus

Answer 8

cell bodies of primary afferents in CNS

Question 9

trigeminal ganglion

Answer 9

primary afferents in all 3 branches of trigeminal

Question 10

spinal trigeminal nucleus of five

Answer 10

pain, temp, crude touchV1,2,3analagous to dorsal horn nuclei in ATLS (spinothalamic tract)

Question 11

pontine sensory nucleus of five

Answer 11

aka chief, main, principleprethalamic relay for proprio, vib, fine touchanalagous to nucleus cuneatus and nucleus gracilis

Question 12

destinatons for trigeminal after pre-thalamic relay

Answer 12

local reflex arcsthalamus (VPM)reticular formationhypothalamuscerebellum

Question 13

lower motor neuronal damage

Answer 13

decreased reflexesbabinski absentmuscle atrophydecreased muscle toneprofound weaknessfasciculations present (twitching)

Question 14

segments in spinal cord

Answer 14

31

Question 15

cord end in adult

Answer 15

L2

Question 16

C1-C7 exit

Answer 16

above vertebrae

Question 17

C8 exit

Answer 17

between C7 and T1

Question 18

below C8 exit

Answer 18

above vetrebrae

Question 19

sympathetics

Answer 19

T1-L2

Question 20

parasympathetics

Answer 20

S2-S4

Question 21

losses in hemisection

Answer 21

lose ipsilateral vibration, proprioception, fine touchlose contralateral pain, temp, crude touchbrown sequard

Question 22

dorsal cord syndrome

Answer 22

lose bilateral dorsal columns

Question 23

ventral cord syndrome

Answer 23

lose anterior 2/3 of cordventral column loss

Question 24

brown-sequard syndrome

Answer 24

hemidisection of spinal cord

Question 25

central cord syndrome

Answer 25

affect area around ventral commissure-increased pain with slight stimuli

Question 26

segmental syndrome

Answer 26

affects all cord functions at one or more levelstransverse cord lesionlesions above - impotence and spastic paralysis of bladder

Question 27

cauda equina syndrome

Answer 27

asymmetric multiradicular painleg weaknesssensory lossbowel/bladder dysfunctionsaddle anesthesia

Question 28

neuralgia

Answer 28

lancinating painsharp

Question 29

compression of trigeminal nerve

Answer 29

superior cerebellar artery