trigeminal system

Question 1

cell bodies of 1st order sensory neurons except for proprioception, in the trigeminal system

Answer 1

trigeminal ganglion

Question 2

cell bodies of proprioceptors from muscles of mastication, in the trigeminal system

Answer 2

mesencephalic nucleus

Question 3

cell bodies of proprioceptors from unconscious proprioception from muscle spindles, in the trigeminal system

Answer 3

mesencephalic nucleus

Question 4

cell bodies of 2nd order neurons, in the trigeminal system

Answer 4

principal nuclei

spinal nucleus of V

Question 5

principal nuclei

Answer 5

large, myelinated afferents (Abeta)

discriminative touch, vibration, proprioception

Question 6

spinal nucleus of V

Answer 6

small, thinly myelinated (Adelta); unmyelinated (C)

free nerve endings: pain & temp

Question 7

spinal nucleus of V is mainly present where

Answer 7

subnucleus caudalis

Question 8

cell bodies of motoneurons to brachial muscles, in the trigeminal system

Answer 8

motor nucleus of V

mastication, tensor tympani, tensor veli palatini, mylohyoid, anterior belly digastric

Question 9

direct input from mesencephalic nucleus, jaw reflexes!

Answer 9

motor nucleus of V

Question 10

peripheral branches of the trigeminal nerve

Answer 10

V1) ophthalmic
V2) maxillary
V3) mandibular
—-with motor root to muscles of mastication

Question 11

head dermatomes

Answer 11

• opthalmic
• maxillary
• mandibular
• cervical plexus
• cervical spinal nerves

Question 12

proprioception from head 1st order neurons

Answer 12

mesencephalic trigeminal nucleus

Question 13

tactile information from head 1st order neurons

Answer 13

trigeminal ganglion

Question 14

tactile information from head 2nd order neurons

Answer 14

• trigeminal brainstem complex

- principal nucleus

Question 15

tactile information from head 3rd order neurons

Answer 15

• thalamus

- VPM nucleus

Question 16

tactile information from head decussation

Answer 16

2nd order axons

Question 17

pain & temp from head 1st order neurons

Answer 17

trigeminal ganglion

Question 18

pain & temp from head 2nd order neurons

Answer 18

subnucleus interpolaris & subnucleus caudalis

Question 19

corneal reflex evoked by

Answer 19

nociceptive stimulation of corneal receptors

Question 20

other blink reflexes evoked by

Answer 20

different types of stimuli (loud sounds, bright light, etc.)

Question 21

receptors involved with corneal reflex

Answer 21

nociceptors (Adelta & C)

corneal receptors

Question 22

cranial nerves involved with corneal reflex

Answer 22

V1, trigeminal ganglion, spinal nucleus of V, motor nucleus of VII, facial nerve (VII)

Question 23

function of corneal reflex

Answer 23

bilateral contraction of orbicularis oculi muscles (blink!)