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Neuro 2 > Pons > Flashcards

Pons Flashcards

1
Q

Glossopharyngeal sensory

A

Primary in the inferior ganglion

SVA - posterior 1/3 of tongue taste terminates in solitary nucleus

GSA - posterior 1/3 of tonuge, pharynx, middle ear terminates in spinal trigeminal nucleus

GVA - carotid body and sinus terminate in caudal 2/3 of solitary nucleus

Snesory portion of gag reflex

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2
Q

Motor of glossopharyngeal

A

SVE - stylopharyngeus…LMN in nucleus ambiguus

GVE - parotid gland…preganglionic para in the inferior salivary nucleus

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3
Q

Vestibulocochlear vestibular portion

A

SSA

Primary in vestibular ganglion and terminate in vestibular nuclei

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4
Q

Vestbiulocochlear auditory portion

A

SSA

Primary in spiral ganglion and terminate in cohclear nuclei

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5
Q

Unilateral deaf means

A

Lesion more superficial than the cochlear nucleus…after cochlear nucleus, will go bilaterally

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6
Q

Stage 1 acoustinc neuroma

A

affects CN 8 - ipsi loss of hearing and balance

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7
Q

Stage 2 acoustic neuroma

A

CN 8 - ipsi loss of hearing and balance
Inf cerebellar peduncle - ipsi ataxia
Spinal trgemin - ipsi loss of pain and temp from face
Root of 9 - loss of gag reflex and difficulty swallowing
Root of 7 - ipsi facial paralysis

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8
Q

Middle cerebellar penducle contains

A

Pontocerebellar fibers from contralateral pontine nuclei

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9
Q

Cerebellar circuit involving pontine nuclei

A

Corticospinal start at cerebral cortex and have branch that comes off at ipsi pontine nuclei…pass to contra superior cerebellar penducle…goes to contra VPL of the thalamus and back to the cerebral cortex.

Therefore lesion to superior cerebellar peduncle leads to ipsi ataxia

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10
Q

Facial nerve motor

A

SVE - in facial motor nucleus…fibers loop around abduens nucleus

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11
Q

Sensory facial nerve

A

primary in geniculate ganglion

SVA - taste (ant 2/3)terminate in nucleus solitarius

GSA - outer ear terminate in trigeminal nuclei

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12
Q

UMN and LMN damage to facial motor nucleus

A

UMN above the pons will only paralyze the lower half of the face contra to the lesion

LMN below the pons will paralyze entire face ipsi to the lesion

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13
Q

Bell’s palsy

A

From Unilateral LMN lesion…forehead not okay and downturned mouth

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14
Q

UMN lesion of facial nerve

A

Forehead okay but downturrned mouth

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15
Q

Abducens neuron locations

A

LMN innervate lateral rectus

UMN located in frontal eye fields of cortex

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16
Q

RF and abducens

A

PPRF just anterior and imoportant for conjugate gaze

17
Q

Lesion abducens nerve and nucleus

A

Nerve - diplopia

Nucleus - lateral gaze paralysis…neither eye can look to lesioned side

18
Q

LSO and MSO

A

Locating high frequency objects in space

LSO - high frequency

MSO - low frequency

19
Q

Principal trgeminal nucleus

A

Pass through middle cerebellar peduncle and carry 2 point touch, proprio and vib from the face

Neurons project bilaterally to the VPM in the DTT

20
Q

Motor trgeminal nucles

A

LMN innervating mastication asnd tensor tympani

21
Q

Spinotrgeminal nucleus

A

Neurons project to VPM in the VTT

22
Q

Lesion spinal trgemin nucleus or principal nucleus

A

Spinotrigem - ipsi loss of pain and temp

Principal nucleus - ipsi loss of 2 point, vib, or proprioception

23
Q

Lesion of VTT or DTT

A

VTT - contralateral loss

DTT- may not be able to tell

24
Q

Muscles of motor trigeminal nucleus

A

Masseter, medial and lateral pterygoid and temporalis

Tensor tympani

25
Q

If LMN lesion of motor trigeminal fibers

A

paralysis of ipsilateral muscles of mastication and hyperacusis to sound

26
Q

Corneal reflex

A

When you touch eye, goes to ipsi principal nucleus and spinal trigeminal nucleus..

If painful, spinal trigeminal has interneurons that synapse with facial motor nuclei and cause blinking of both eyes

27
Q

Lesion affarent portion of trigeminal nerve or efferent/ipsi facial nucleus portion of nerve in corneal reflex

A

Affarent - neither eye blinks if ipsi touched…both eyes blink if contra touched

Efferent - If touch ipsi, then only contra blinks…if touch contra, then only contra blinks

28
Q

Mesencepahlic nucleus

A

Located in periaqueductal gray area and controls force of bite…neural crest cell derived

29
Q

Locus ceruleus

A

Noradrenergic neurons extensive rostral and caudal through CNS…involved in arousal, sensory modulatio nand motor tone

30
Q

Dysarthria syndrome

A

Medial pontine syndrome

Paramedian branches of basilar artery

Corticospinal tract - contra UMN signs

Medial lemnisucs - contral loss of vib, proprio, and fine touch

VTT - contra loss of pain and temp form face

Facial nerve roots - ipsi facial muscle weakness

Abducens root - ipsi paralysis of LR

31
Q

Lateral pontine syndrome

A

Mid cerebellar peduncle - ipsi ataxia

Spinal trigeminal tract - ipsi loss of pain/temp from face

Anterolateral tract - contra loss of pain and temp from body

Hypothal descencing fibers - ipsi Horner’s syndrome

Neuro 2 (26 decks)

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