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Neuro Exam II > Motor System II > Flashcards

Motor System II Flashcards

1
Q

What is the origin of the corticotectal tract

A

occipital lobe (visual assoication cortex)

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2
Q

what is the termination of the corticotrectal tract

A

oculomotor accessory nuclei

superior colliculus

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3
Q

what is the origin of the tectospinal tract

A

superior colliculus

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4
Q

what is the termination of the tectospinal tract

A

C and T spinal cord levles

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5
Q

what is the function of tectospinal tract

A

reflex movement of eyes, head/neck, and upper thorax in response to auditory, vestibular, or cutaneous stimuli

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6
Q

where are teh accessory oculomotor nuclei located

A

in vicinity of oculomotor nucleus

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7
Q

where is superior colliculus located

A

in back of midbrain

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8
Q

where do vestibulospinal tracts arise from

A

vestibular nuclei in brainstem

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9
Q

where do corticorubral, corticoreticular tracts arise from

A

sensory motor cortex

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10
Q

function of pyramidal system

A

conscious voluntary control of movement

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11
Q

what tracts make up the pyramidal system

A

corticonuclear and corticospinal tract

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12
Q

termination of corticonuclear tract

A

CN motor nuclei

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13
Q

course of corticonuclear tract

A

down brainstem and upper part of cervical spinal cord

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14
Q

function of corticonuclear tract

A

conscious, voluntary movement in the head and neck region

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15
Q

where does corticospinal tract divide

A

caudal medulla

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16
Q

what does corticospinal tract divide into

A

anterior corticospinal tract and lateral corticospinal tract

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17
Q

course of lateral corticospinal tract

A

cross over to oppsoite side
descend into spinal cord
fibers terminate at all spinal cord levels

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18
Q

course of anterior corticospinal tract

A

don’t cross

19
Q

axons of the corticospinal tract are ____

A

UMNs

20
Q

what makes up the silent system

A

reticulospinal, vesticulospinal

21
Q

where does corticorubral tract terminate

A

red nucleus located in midbrain

22
Q

where does rubrospinal tract arise

A

red nucleus

23
Q

what does red nucleus contrain

A

cell bodies of UMNs

24
Q

function of rubrospinal tract

A

stimulate flexor muscles of hand, not prominent in humans

25
Q

function of corticorubral tract

A

movement of hand and fingers, not significant

26
Q

what do corticorubral, rubrospinal tract supplement

A

cortiocospinal tract

27
Q

course of corticoreticulat tract

A

arise from cortex
descend in corona radiatea and internal capsul
terminate in nucli in the reticular formatin in core of brainstem

28
Q

where do reticulospinal trafcts terminate

A

spinal cord

29
Q

function of reticulospinal tract

A

bring messages to gamma motor neuron

30
Q

where do gamma motor neurons terminate

A

polar contractile portion of an intrafusal fiber inside a muscle spindle, cause contraction

31
Q

where do reticulospinal tract fibers synpase

A

all spinal cord levels

32
Q

function of cerebellum

A

produce muscle tone

33
Q

function of basal ganglia

A

inhibits excess muscle tone

34
Q

function of medial reticulospinal tract

A

excitatory to antigravity muscles

35
Q

function of lateral reticulospinal tracts

A

inhibit antigravity muscles

36
Q

general function of reticulospinal tracts

A

posture maintenance

modulation of muscle tone

37
Q

what 2 tracts does the venticular nuclei gives rise to

A

medial and lateral vestibulospinal tracts

38
Q

function of lateral VST

A

excitatory to antigravity muscles, helps us regain balance so we don’t fall down

39
Q

where is lateral VST found

A

all spinal cord lelvels

40
Q

where is medial VST found

A

cervical and upper thoracic spinal cells

41
Q

how do you get brown-sequard syndrome

A

perfect hemisection of spinal cord

42
Q

results from brown-sequard syndrome

A 
UMN lesion signs
LMN lesion signs
loss of reflex activty
loss of fine touch
loss of P and T
43
Q

how can you get combines systems disease

A

vitamine B12 deficency

44
Q

where will you get defiects in combined systems disease

A

upper and lower limbs if bilateral lesion

Neuro Exam II (10 decks)

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