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Neuro > Ascending pathways of brainstem > Flashcards

Ascending pathways of brainstem Flashcards

1
Q

3 portions of GSA inut for trigeminal sensory nuclear complex

A

mesencephelic nucleus
principal trigeminal or main nucleus
spinal trigeminal nucleus

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2
Q

spinal ncuelus of trigemina

A

nucleus oralis - mouth
nucleus interpolaris - mouth
nucleus caudalis

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3
Q

opthalmic

A

V(1)

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4
Q

maxillary

A

V(2)

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5
Q

madibular

A

V(3)

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6
Q

Main sensory nucleus

A

Pons
vibrotactile discrimination
chief sensory nucleus
like nucleus gracilis or cuneatus

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7
Q

Spinal trigeminal

A

medulla
pain, temperature, down to cervical cored
nucleus causalis

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8
Q

Mesencephalic

A

midbrain
proprioceptive
psuedounipolar

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9
Q

ventral trigeminotholamic (spinotrigeminal) tract transmits

A

nociceptive info of head

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10
Q

all trigeminal nerves come into

A

pons

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11
Q

VentralTrigeminothalamictract type of ingo

A

pain temp

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12
Q

VentralTrigeminothalamictract point of origin and receptors

A

free nerve ending (trpV channels) skin, viscera and muscles

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13
Q

VentralTrigeminothalamictract cell bodies

A

trigeminal/semilunar/gasserian nucleus

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14
Q

VentralTrigeminothalamictract enters and travels

A

Pons, descends to spinal trigeminal nucleusof medulla via the spinal trigeminal tract

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15
Q

VentralTrigeminothalamictract decussates

A

Internal arcuatefibers ventral to spinal trigeminal nucleus in medulla (travels with anterolateralsystem)

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16
Q

VentralTrigeminothalamictract first synapes

A

spinal trigeminal nucleus (somatotopic organization)

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17
Q

VentralTrigeminothalamictract second synapse

A

ventral posterior medial nucleus (VPM) of thalamus

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18
Q

VentralTrigeminothalamictract final destination

A

Primary somatosensory cortex (via internal capsule and corona radiate)

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19
Q

orientation of trigeminal fibers in spinal trigeminal nuclei

A

lateral to mideal V123

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20
Q

order of trigeminal fibers in vpm

A

v321 medial to lateral

21
Q

The Spinal Trigeminal Tract also carries fibers from 3 additional cranial nerves

A 
•CN VII
–Ear (small portion)
•CN IX
–Ext. auditory meatus
–Back of ear
•CN X
–External ear
22
Q

trigeminal neuralgia

A
  • “tic douloureux”
  • Most common in maxillary div
  • Vascular compression
  • Right side more commonly affected

hyperctivity of nociocerptor neurons feeding into spinal trigeminal nucleus

23
Q

nociceptive input of meninges

A

diff. branches of V
don’t feel pain in brain just dura so most of the pain is reffered pain
lateral aspects goes to maxillary and mandibular the rest goes to the eyes

24
Q

The trigeminocardiacreflex can be carried via the spinotrigeminaltract

A

–Duringneurosurgery, complication from massive parasympatheticresponse:
Heart Rate
Blood Pressure
Respiration Rate

cold water on face, diving reflex, worse in childre

25
Q

MSN/ML and Dorsal Trigeminothalamictract type of info

A

Tactile discrimination, Point of origin, receptors involved: Meissner’s corpuscles, merkel’sdisks, paciniancorpuscles, ruffini’sendings

26
Q

MSN/ML and Dorsal Trigeminothalamictract cell bodies

A

trigeminal/semilunar/gasserian

27
Q

MSN/ML and Dorsal Trigeminothalamictract first synapse

A

main sensory nucleus

28
Q

MSN/ML and Dorsal Trigeminothalamictract enters and travels

A

pons, ascend contralaterally (for face) and ipsilaterally (for oral cavity)

29
Q

MSN/ML and Dorsal Trigeminothalamictract decussates

A

in pons, ascends with medial lemniscus

30
Q

MSN/ML and Dorsal Trigeminothalamictract second synapse

A

ventral posterior medial nucleus (VPM) of thalamus

31
Q

MSN/ML and Dorsal Trigeminothalamictract final destinatino

A

primary somatosensory cortex (via interal capsul and corona radiata

32
Q

basic touch info of the head ascends

A

bilaterally in 2 pathways

33
Q

oral cavity ascends

A

ipsilaterally

34
Q

head ascends

A

contralaterally

35
Q

Trigeminocerebellar tract type of info

A

unconscious proprception of head

36
Q

Trigeminocerebellar tract point of origin and receptors

A

muscle spindles gto in muscles joints and tendons

37
Q

Trigeminocerebellar tract cell bodies

A

mesencephalic nucleus

38
Q

Trigeminocerebellar tract first synapse

A

cerebellum

39
Q

Trigeminocerebellar tract enters and travels

A

enters pons ascend to mesencephalic nucelus

40
Q

Trigeminocerebellar tract decussates

41
Q

Trigeminocerebellar tract second synapse

A

vermis of cerebellum via inferior cerebellar peduncle

42
Q

Trigeminocerebellar tract final destination

A

deep cerebellar nuclei (via purkinje cells)

43
Q

proprioceptive input enters the brain at the pons and ascends to

44
Q

From the Mes. NucV:

A
  • Cerebellum (Proprioceptive)
  • Vestibular nuclei (proprioceptive, reflex)
  • Reticular formation (change behavioral state)
  • Motor nucleus of V (Jaw-jerk reflex)
  • Facial motor nucleus (Primary-gaze frontalisreflex)
45
Q

proprioceptive reflex arc to face important for

A

1) Important in preventing Ptosis

2) Important for raising eyebrows

46
Q

voluntary eye opening

A

when voluntary open eyes

no muscle spindles

specialized mechanoreceptor(acts like spindle in wheelers muscle above eyelid

wheelers muscle sends axons back to
mesocephalic nucleus of trigeminal nerve when we voluntarily open eyre

through this same axon loops around and goes to occulomotor nucleus and activates levator palpebrae to open eye more

other place it goes is facial motor nucleus to activated frontalis muscle

47
Q

yayoi-derived trait

A

eyebrows raised in primary gaze

from asia

no superior palpebral fold

for retaining heat

primary gaze affected so they have more frontalis and a higher arch above eye

ligament keeps eyes a little closed

48
Q

jomon-derived trait

A

eyebrows not raised in primary gaze

western eye like native americans

have palperbral fold

49
Q

lateral meduallry (wallenbergs) syndrom

A

•Stroke of the PICAleads to, (among other symptoms)
–Ipsilateralloss of Pain/Temp in the face
–Contralateralloss of Pain/Temp in the body
–Horner’s Syndrome

Neuro (10 decks)

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