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neuro block 7 > Motor Systems - LectureCapture > Flashcards

Motor Systems - LectureCapture Flashcards

1
Q

Path of the corticospinal and corticonuclear projections

A

Descend through internal capsule -> cerebral peduncle -> basilar pons -> pyramids -> forms A/L corticospinal systems

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2
Q

What is the primary motor cortex?

A

Pre central gyrus

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3
Q

Where is the supplementary motor cortex located?

A

Above the pre/post central gyri

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4
Q

Where is the cortical micturition center located?

A

On the supplementary motor area, medial superior frontal gyrus for voluntary motor control in pre central gyrus

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5
Q

All LMNs project to

A

Muscles

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6
Q

All UMNs project to

A

LMNs

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7
Q

Cranial nerve nuclei are ______ (what type of motor neurons)

A

UMNs

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8
Q

REVIEW BODY MAP

A

REVIEW BODY MAP

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9
Q

Lateral cortex is supplied by

A

MCA

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10
Q

Medial cortex is supplied by

A

ACA

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11
Q

Face is located where on the internal capsule?

A

Genu

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12
Q

Posterior limb of internal capsule contains what structures

A

Arm
Torso
Leg

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13
Q

Somatosensory projections and motor projections use what part of the internal capsule?

A

Posterior limb

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14
Q

What parts of the brain are active when doing finger flexion or tap finger on a surface?

A

ONLY primary motor and somatosensory

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15
Q

What parts of the brain are active when doing a finger movement sequence?

A

Primary motor, somatosensory, and supplementary motor area

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16
Q

What parts of the brain are active when doing a mental rehearsal of a finger tapping sequence?

A

Supplementary ONLY

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17
Q

Apraxia

A

Inability to perform a complex movement or sequence of movements (especially learned)

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18
Q

Premotor cortex gets input from

A

Proprioception, visual system, and thalamic motor nuclei

19
Q

The premotor cortex guides

A

The primary motor cortex

20
Q

If you have premotor damage WITHOUT primary motor damage, what deficits

A

NO WEAKNESS, you get apraxia (weakness can mask apraxia in some instances)

21
Q

Input from prefrontal cortex is probably related to what kinds of movements?

A

Learned (buttoning a shirt)

22
Q

Supplementary cortex projects to

A

UMN in primary motor cortex

23
Q

If you have supplementary cortex damage WITHOUT primary motor damage, what deficits

A

Apraxia, not weakness

24
Q

Frontal eye fields function

A

UMN for voluntary eye movements

25
Q

Do you have the vestibulocular reflex with FEF damage?

A

NO - VO still intact

26
Q

FEF corticonuclear projections are ______ to oculomotor and trochlear

A

Bilateral

27
Q

FEF corticonuclear projections are ______ to abducens

A

Contralateral

28
Q

FEF drives lateral conjugate gaze towards which side?

A

Opposite side

29
Q

Left FEF controls ______ gaze

A

Rightward

30
Q

Right FEF controls ______ gaze

A

Leftwards

31
Q

Unilateral FEF damage causes

A

Deviation towards lesion

32
Q

A left FEF lesion would cause what kind of deviation?

A

Leftward deviation
This makes sense because the normal function of FEF is rightward gaze, so if damaged, you get a leftward deviation and inability to voluntarily look right

33
Q

With FEF - if the abducens is intact, you get what kinds of movement?

A

Reflex, not voluntary

34
Q

Function of the cortical micturition center

A

Supresses voiding through projections from the superior frontal gyrus -> pontine micturition center

35
Q

Frontal type incontinence occurs when what is damaged?

A

Cortical micturition center

If only one is damaged, deficits are variable

36
Q

Symptoms of frontal type incontinence

A

When bladder is full, patent is unable to stop reflex voiding
If only this part of the frontal lobe is damaged, the patient is likely distressed (if more frontal damage, there is less distress)

37
Q

Sympathetic effect on voiding

A

Inhibits detrusor, activates sphincter (for urine storage)

38
Q

Parasympathetic effect on voiding

A

Activates detrusor, inhibits internal sphincter (may partially compensate for frontal type incontinence)

39
Q

If primary motor is intact, but premotor is damaged

A

Aprexia

40
Q

If primary motor is intact, but FEF is damaged

A

gaze deviation deficit

41
Q

If primary motor is intact, but Broca’s is damaged

A

Language output deficit

42
Q

Pericallosal branch of the ACA supplies

A

Cingulate gyrus

43
Q

Callosmarginal branch of the ACA supplies

A

Superior frontal gyrus

44
Q

Occlusion of callosomarginal branch of the ACA results in

A

Leg portion of PMC, entire supplementary, and cortical micturition center

neuro block 7 (8 decks)

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