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SP16 Anatomy > Neuro L4 > Flashcards

Neuro L4 Flashcards

1
Q

Divisions of CNV
Name
motor or sensory

A

TRIGEMINAL NERVE
Opthalmic: sensory
Maxillary: sensory
Mandibular: sensory and motor

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2
Q

Trigeminal motor nucleus located in

A

Dorsal pons

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3
Q

Mesencephalic nucleus
Fiber myelination
Homologue of
Function

A

Heavily myelinated
Posterolateral column: Medial lemniscus system
Proprioception

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4
Q

Main/principal sensory nucleus
Fiber myelination
homologue of
Function

A

Heavily myelinated
Posterolateral column: Medial lemniscus system
Discriminative touch/vibration

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5
Q

Spinal nucleus
Fiber myelination
Homologue of
Function

A

Lightly myelinated fibers
Homologue of anterolateral system
Pain, crude touch, temperature

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6
Q

Trigeminal main/principal sensory nucleus location

A

midpons

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7
Q

CN V Sensory afferent serves (3)

A

Face
Oral cavity
Meninges

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8
Q

V main sensory nucleus ascending crossed pathway joins

A

Joins medial lemniscus

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9
Q

V main sensory nucleus ascending uncrossed comes from _____ and goes to _____

A

Comes from mouth and goes to Ventral Posteromedial nucleus

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10
Q

Spinal trigeminal afferents ascend/descend spinal trigeminal tract and synapse in_____

A

descend

synapse in caudal spinal nucleus

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11
Q

Second order spinal trigeminal afferents pathway

A

cross midline

Ascend and join spinothalamic tract

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12
Q

Second order spinal trigeminal afferents terminate in

A

VPM

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13
Q

Trigeminal mesencephalic nucleus located in

A

midbrain

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14
Q

Onion peel

A

Pars caudalis

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15
Q

Pars caudalis

Primarily what type of fibers

A

pain fibers

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16
Q

Pars Caudalis organization

A

Onion peel
Rostral: oral
Caudal: peripheral face

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17
Q

Pars caudalis receives afferents from these cranial nerves

A

VII
IX
X

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18
Q

Substantia gelatinosa of pars Caudalis

contains these neurons

A

excitatory and inhibitory interneurons

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19
Q

Substantia gelatinosa of pars Caudalis

Receives

A

Raphe spinal tract fibers (serotonin)

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20
Q 
Pars Caudalis somatotopic arrangements
Mandibular
Opthalmic
Maxillary
Fibers representing center of face
Fibers representing back of face
A 
Mandibular: dorsal
Maxillary: in between
Opthalmic Ventral
end near obex
upper cervical cord
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21
Q

The more rostral/caudal the spinal trigeminal tract injury, the larger the area around the mouth that is spared of sensory loss

A

Caudal

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22
Q

Trigeminal spinal nucleus has _____ projection to _______

A

contralateral projection to VPM of thalamus (internal capsule…postcentral gyrus parietal lobe (Brodmanns area 312))

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23
Q

Trigeminal main sensory nucleus has _____ projection to _______

A

bilateral projection to VPM of thalamus (internal capsule…postcentral gyrus parietal lobe (Brodmanns area 312))

24
Q

Trigeminal neuralgia
Usually in
Usually caused by

A

Brief episodes of excruciating pain in division of trigeminal nerve
Mandibular (70%)
Opthalmic (

25
Q

Treating trigeminal neuralgia (incorrect)

A

cut nerve root results in lossa of pain AND all tactile sensation, temp, and proprioception

26
Q

Danger of Treating trigeminal neuralgia while saving tactile sensation

A

Cut occurs caudal to obex near medulla

Compromises medullary cardiovascular and respiratory centers

27
Q

modern way of treating trigeminal neuralgia

A

microvascular decompression

28
Q

Trigeminal mesencephalic nucleus terminating in trigeminal motor nucleus is involved in

A

jaw jerk reflex

29
Q

Trigeminal mesencephalic nucleus terminating in supratrigeminal nucleus is involved in

A

chewing movements

30
Q

Trigeminal mesencephalic nucleus sense

A

proprioception

31
Q

Trigeminal mesencephalic nucleus proprioception receptors

A

Nueromuscular spindles of mastication muscles

Pressure/tension receptors in perio ligaments

32
Q

Mesencephalic nucleus type of cell body

A

unipolar

33
Q

Mesencephalic nucleus projects to (2)

A

Trigeminal motor nucleus

Supratrigeminal nucleus

34
Q

Mesencephalic nucleus helps control

A

distance between mandible and maxilla

35
Q

Trigeminal motor nucleus terminates in

A

muscles of mastication

36
Q

Lesion to trigeminal motor nucleus causes

A

weaked jaw closure

opened jaw will deviate toward side of lesion

37
Q

Supratrigeminal nucleus function

A

pattern generator for masticatory rhythm

38
Q

Trigeminal motor nucleus innervates (3)

A

MOM
Tensor tympani
Tensor palati

39
Q

Jaw jerk reflex
How many synapses
Afferent limb (innervating what muscle)
Efferent limb

A

monosynaptic
Afferent: mesencephalic V innervating masseter spindle
Efferent: V motor nucleus

40
Q

Major connections of trigeminal nerve (4)

A

masseter muscle spindles (mechanoreceptor)
Tactile afferents
Muscles of mastication (motor)
Pain/temperature afferents

41
Q

Actions of CNVII

A 
Motor:
Facial expression
Stapedius muscle (modulates sound)
Sensory:
Skin of outer ear
Palatine tonsil and posterior nasal cavity
Taste
Salvation
Lacrimation
42
Q

Somatic sensory component of CNVII act exactly as

A

trigeminal afferents

43
Q

Facial motor innervation of upper and lower face

Laterality

A

Upper: bilaterally
Lower: contralateral

44
Q

Damage to cerebral peduncle
What pathway
Consequences

A

Damage to corticobulbar pathway

inability to smile symmetrically but forehead unaffected

45
Q

Bell’s Palsy

symptoms

A

VII dysfunction
Paresis of facial muscles above and below eye
Hyperacusus (stapedius)
Reduced lacrimation and salvation

46
Q

Corneal blink reflex
Afferent limb
Efferent limb

A

V1 to spinal V nucleus

Spinal V nucleus/reticular formation bilateral projection to VII

47
Q

CN dealing with taste

A

VII
IX
X

48
Q

Nervus intermedius lies between and aligns with _____ distal to ______

A

lies between VII and VIII

Aligns with VII distal to genu

49
Q

Taste input go to

A

rostral aspect of solitary tract nucleus

50
Q

VII pathway from tongue

A

Look at picture

51
Q

Second order gustatory afferents travel to the ______ thru the ______

A

solitary tract nucleus thru the solitary tract

52
Q

Gustatory fiber pathway

A

Project uncrossed to thalamus (VPM) then to gustatory cortex
integrates witholfactory info
amygdala
limbic system and hypothalamus

53
Q

In pontine tegmentum: most fibers go to this nucleus

A

supratrigeminal

54
Q

Mesenchephalic nucleus gets info from this in Mandibular division

A 
MOM stretch receptors (spindles)
Stretch receptors (ruffini endings) in suspensory and perio ligaments
55
Q

Mesencephalic nucleus gets into from this in Maxillary division

A

Stretch receptors (ruffini endings) in suspensory and perio ligaments

SP16 Anatomy (11 decks)

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