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Flashcards in Ascending Cranial Pathways Deck (29):
1

CN V

trigeminal nerve

2

trigeminal nerve

all somatosensory of head

proprio, vib, fine touch
pain, temp, crude touch


also motor to mastication muscles

3

opthalmic nerve

V1
sensory

4

maxillary nerve

V2
sensory

5

mandibular nerve

V3
sensory and motor

6

dermatomes of trigeminal

V1 - nose and upper forehead
V2 - bottom nose to lips
V3 - chin to temple

7

ganglia for cranial nerves

named nuclei

8

mesencephalic nucleus

cell bodies of primary afferents in CNS

9

trigeminal ganglion

primary afferents in all 3 branches of trigeminal

10

spinal trigeminal nucleus of five

pain, temp, crude touch
V1,2,3

analagous to dorsal horn nuclei in ATLS (spinothalamic tract)

11

pontine sensory nucleus of five

aka chief, main, principle

prethalamic relay for proprio, vib, fine touch

analagous to nucleus cuneatus and nucleus gracilis

12

destinatons for trigeminal after pre-thalamic relay

local reflex arcs
thalamus (VPM)
reticular formation
hypothalamus
cerebellum

13

lower motor neuronal damage

decreased reflexes
babinski absent
muscle atrophy
decreased muscle tone
profound weakness
fasciculations present (twitching)

14

segments in spinal cord

31

15

cord end in adult

L2

16

C1-C7 exit

above vertebrae

17

C8 exit

between C7 and T1

18

below C8 exit

above vetrebrae

19

sympathetics

T1-L2

20

parasympathetics

S2-S4

21

losses in hemisection

lose ipsilateral vibration, proprioception, fine touch
lose contralateral pain, temp, crude touch

brown sequard

22

dorsal cord syndrome

lose bilateral dorsal columns

23

ventral cord syndrome

lose anterior 2/3 of cord
ventral column loss

24

brown-sequard syndrome

hemidisection of spinal cord

25

central cord syndrome

affect area around ventral commissure
-increased pain with slight stimuli

26

segmental syndrome

affects all cord functions at one or more levels

transverse cord lesion

lesions above - impotence and spastic paralysis of bladder

27

cauda equina syndrome

asymmetric multiradicular pain
leg weakness
sensory loss
bowel/bladder dysfunction
saddle anesthesia

28

neuralgia

lancinating pain
sharp

29

compression of trigeminal nerve

superior cerebellar artery