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Neuroscience > Medulla > Flashcards

Medulla Flashcards

1
Q

Difference of lower 1/3 of medulla to the spinal cord

A

Beginning of nucleus cuneatus
Descending nucleus and tract of CN5 trigeminal
Ventral horn starts to disappear

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2
Q

Pain and temperature in the ipsilateral side of the face

A

Descending nucleus and tract of trigeminal CN5

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3
Q

Considered as the somatic sensory center of the brain since all CN with general sensory function would synapse in it

A

Descending nucleus and tract of trigeminal CN 5

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4
Q

Contralateral pain and temperature in the body

A

Lateral spinothalamic tract

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5
Q

Axons from nucleus cuneatus & nucleus gracilis forms

A

Internal arcuate fibers

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6
Q

Conscious proprioception from contralateral side of the body

A

Medial lemniscus

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7
Q

Lesion on posterior column tracts would manifest

A

Ipsilateral loss of conscious proprioception, discriminative touch and vibration sense

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8
Q

Lesion on medial lemniscus will manifest

A

Contralateral loss of conscious proprioception, discriminative touch and vibration sense

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9
Q

Part of medulla where posterior column tract decussated

A

Middle 1/3 of the medulla

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10
Q

Carries unconscious proprioceptive information above C8

Will form dorsal external arcuate fibers that would enter cerebellum via Inf ceb peduncle

A

Accessory cuneate nucleus

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11
Q

Nucleus in the area of pyramid

Receives major input from contralateral cerebral cortex

A

Arcuate nucleus

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12
Q

Part of descending nucleus of V responsible in pain and temperature on ipsilateral side of the face

A

Pars caudalis

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13
Q

Part of descending nucleus of V that mediates dental pain

A

Pars interpolaris

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14
Q

Part of descending nucleus of V that mediates tactile sensation from oral mucosa

A

Nucleus oralis

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15
Q

Caudal peak of rhomboid fossa

A

Obex

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16
Q

side of obex that lacks blood brain barrier making it sensitive to noxious agents
Chemosensitive emetic center

A

Area postrema

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17
Q

Most prominent structure in the open medulla

A

Inferior olivary nuclear complex

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18
Q

Alar plate derivatives
Sensory in function
(Lateral to sulcus limitans)

A

Spinal nucleus of trigeminal
Solitary nucleus
Lower border of vestibulococchlear

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19
Q

Nuclei in Inferior Olivary nuclei complex

A

Principal olivary nucleus
Medial accessory nucleus
Posterior accessory nucleus

20
Q

Inferior olivary nuclear complex projects to cerebellum as

A

Olivocerebellar fibers

Biggest component of inferior cerebellar peduncle

21
Q

Medial lemniscusis well form at this part of medulla

A

Upper 1/3

22
Q

Responsible for conjugate gaze

If not functional = diplopia

A

Medial longitudinal fasciculus

23
Q

Join with juxtarestiform body to forming the Inferior Cerebellar Peduncle

A

Restiform body

24
Q

Motor fibers supplying the derivatives of the somites
Most medial
CN 3 4 6 12

A

GSE

25
Q

Motors supplying smooth muscles, cardiac muscles and glands

A

GVE

26
Q

Motor fibers supplying musclesderived from branchial arches

A

SVE

27
Q

fibers supplying surface of skin

A

GSA

28
Q

fibers supplying muscoa of the viscera, throat, resp tract, gi tract

A

GVA

29
Q

fibers supplying hearing and equilibrium

A

SSA

30
Q

fibers supplying taste

A

SVA

31
Q

Lesion in CN9 glossopharyngeal

A

Ipsilateral loss of taste and gag reflex

32
Q

Bilateral damage to this CN is fatal

A

CN10 Vagus nerve

33
Q

Unilateral lesion in CN 10 vagus nerve

A

Ipsilateral paralysis of soft palate, pharynx, larynx

34
Q

Lesion in CN11 spinal accessory nerve

A

Ipsilateral drooping and difficulty of turning head contralaterally

35
Q

Lesion to CN12 hypoglossal nerve

A

Tongue protrusion towards affected side

36
Q

Located in the middle 1/3 of solitary nucleus supplying diaphragm

A

Dorsal respiratory group

37
Q

Located in the nucleus ambiguus

Supplies intercostal and abdominal muscles

A

Ventral respiratory group

38
Q

Suppression of central pain transmission

Serotonergic

A

Raphe nuclei

39
Q

Nerve network that plays important role in controlling arousal or wakefulness

A

Reticular nuclei

40
Q

Vomiting center

A

Dosolateral MRF

41
Q

Sympathetic vasomotor center

A

Ventrolateral MRF

42
Q

Arterial supply of anterolateral portion of medulla

A

Medullary branch of vertebral artery

43
Q

Arterial supply of posterior portion of open medulla

A

Posterior inferior cerebellar artery

44
Q

Arterial supply of posterior portion of closed medulla

A

Posterior spinal artery

45
Q

Arterial supply of anteromedial portion of medulla

A

Anterior spinal artery

46
Q

Venous supply of medulla

A

Basilar venous plexuses
Inferior petrosal sinus
Occipital sinus

Neuroscience (3 decks)

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