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SP16 Anatomy > Neuro L4 > Flashcards

Neuro L4 Flashcards

(55 cards)

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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 _______

Study These Flashcards
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

Study These Flashcards
A

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

25
Treating trigeminal neuralgia (incorrect)
cut nerve root results in lossa of pain AND all tactile sensation, temp, and proprioception
26
Danger of Treating trigeminal neuralgia while saving tactile sensation
Cut occurs caudal to obex near medulla | Compromises medullary cardiovascular and respiratory centers
27
modern way of treating trigeminal neuralgia
microvascular decompression
28
Trigeminal mesencephalic nucleus terminating in trigeminal motor nucleus is involved in
jaw jerk reflex
29
Trigeminal mesencephalic nucleus terminating in supratrigeminal nucleus is involved in
chewing movements
30
Trigeminal mesencephalic nucleus sense
proprioception
31
Trigeminal mesencephalic nucleus proprioception receptors
Nueromuscular spindles of mastication muscles | Pressure/tension receptors in perio ligaments
32
Mesencephalic nucleus type of cell body
unipolar
33
Mesencephalic nucleus projects to (2)
Trigeminal motor nucleus | Supratrigeminal nucleus
34
Mesencephalic nucleus helps control
distance between mandible and maxilla
35
Trigeminal motor nucleus terminates in
muscles of mastication
36
Lesion to trigeminal motor nucleus causes
weaked jaw closure | opened jaw will deviate toward side of lesion
37
Supratrigeminal nucleus function
pattern generator for masticatory rhythm
38
Trigeminal motor nucleus innervates (3)
MOM Tensor tympani Tensor palati
39
Jaw jerk reflex How many synapses Afferent limb (innervating what muscle) Efferent limb
monosynaptic Afferent: mesencephalic V innervating masseter spindle Efferent: V motor nucleus
40
Major connections of trigeminal nerve (4)
masseter muscle spindles (mechanoreceptor) Tactile afferents Muscles of mastication (motor) Pain/temperature afferents
41
Actions of CNVII
``` Motor: Facial expression Stapedius muscle (modulates sound) Sensory: Skin of outer ear Palatine tonsil and posterior nasal cavity Taste Salvation Lacrimation ```
42
Somatic sensory component of CNVII act exactly as
trigeminal afferents
43
Facial motor innervation of upper and lower face | Laterality
Upper: bilaterally Lower: contralateral
44
Damage to cerebral peduncle What pathway Consequences
Damage to corticobulbar pathway | inability to smile symmetrically but forehead unaffected
45
Bell's Palsy | symptoms
VII dysfunction Paresis of facial muscles above and below eye Hyperacusus (stapedius) Reduced lacrimation and salvation
46
Corneal blink reflex Afferent limb Efferent limb
V1 to spinal V nucleus | Spinal V nucleus/reticular formation bilateral projection to VII
47
CN dealing with taste
VII IX X
48
Nervus intermedius lies between and aligns with _____ distal to ______
lies between VII and VIII | Aligns with VII distal to genu
49
Taste input go to
rostral aspect of solitary tract nucleus
50
VII pathway from tongue
Look at picture
51
Second order gustatory afferents travel to the ______ thru the ______
solitary tract nucleus thru the solitary tract
52
Gustatory fiber pathway
Project uncrossed to thalamus (VPM) then to gustatory cortex integrates witholfactory info amygdala limbic system and hypothalamus
53
In pontine tegmentum: most fibers go to this nucleus
supratrigeminal
54
Mesenchephalic nucleus gets info from this in Mandibular division
``` MOM stretch receptors (spindles) Stretch receptors (ruffini endings) in suspensory and perio ligaments ```
55
Mesencephalic nucleus gets into from this in Maxillary division
Stretch receptors (ruffini endings) in suspensory and perio ligaments

SP16 Anatomy (11 decks)

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