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Neuroanatomy-spring'16 > Lecture 9 > Flashcards

Lecture 9 Flashcards

1
Q

what is motor equivalence

A

muscle action that is more abstract rather than one that is completed by a prescribed set of muscle activation…

can write name with hand, foot, teeth

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2
Q

main fn of ventromedial pathways

A

posture + balance

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3
Q

main fn of lateral pathways

A

skilled/fine movements

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4
Q

which pathway does NOT have subcortical origins (and where does it originate from)?

A

corticospinals

motor cortex

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5
Q

medial vestibulospinals project?

A

bilaterally

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6
Q

lateral vestibulospinals project?

A

ipsilaterally

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7
Q

reflexes of vestibulospinal

A

VCR
VOR
VSR

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8
Q

type of projections from reticulospinal

A

bilateral

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9
Q

which pathway is involved in postural adjustments for anticipated movements

A

reticulospinal

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10
Q

which system involved in postural adjustments for UNanticipated movements

A

vesitbuliar

proprioceptors

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11
Q

what does medial reticulospinal
excite?/excited by?
inhibit?/inhibited by?

A

excite: extensors + flexors

inhibited by: higher centers

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12
Q

what does lateral reticulospinal
excite?/excited by?
inhibit?/inhibited by?

A

excite: upper flexors
inhibit: ALL extensors
excited by: higher centers

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13
Q

colliculospinals travel in which direction to the cervical cord

A

contralateral

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14
Q

FN of colliculospinal

A

head orienting movements because superior colli activated

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15
Q

what do corticobulbars innervate

A

RF
RN
PN
CN ( no 3,4,6)

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16
Q

corticospinals innervate

A 
RF
RN
BG
VN
PN
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17
Q

lateral cortices triggered by

A

external events

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18
Q

supplementary motor (medial) cortices triggered by

A

internal events

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19
Q

fn of vestibulospinal

A

posture + eye mvmts

use: axial, limb, eye muscles

20
Q

fn of reticulospinal

A

posture + mvmts

use: proximal muslces

21
Q

fn of tectospinal

A

head orienting mvmts

use: neck muscles

22
Q

fn of ant corticospinal

A

posture + mvmt

use: axial + proximal muscles

23
Q

fn of corticospinal

A

skilled mvmts

use: distal muscles

24
Q

fn of rubrospinal

A

proximal arm flexors

25
Q

rubrospinal ori

A

red nucleus

26
Q

rubrospinal input?

A

BS + Cerebellum

27
Q

where does rubrospinal decussate

A

ponds

28
Q

which tract does rubrospinal join

A

corticospinal

29
Q

where rubrospinal travel

A

lateral cord

30
Q

what does rubrospinal innervate

A

(proximal) arm flexors

31
Q

medial longitudinal vestibulospinal projects to? via?

A

CN 3,4,6 (VOR)
neck muscles
via: medial longitudinal fasiculus

32
Q

lateral longitudinal vestibulospinal projects ot?

A

limb motor neurons

cerebellum

33
Q

medial vestibulospinal comes from __ part of ear?

A

canals

34
Q

lateral vestibulospinal comes from __ part of ear?

A

otolith organs

35
Q

anterior corticospinals use ___ funiculus

A

ventromedial

36
Q

lateral corticospinals use ___ funiculus

A

dorsolateral

37
Q

where are corticospinals found/originate

A

caudal medullla

38
Q

corticospinal composition

A

60- area 4 (primary motor cortex), 5% betz
30- area 6 (premotor)
10- somatosensory + cingulate cortex

39
Q

supplementary motor (medial) cortices use?

A

ACC

40
Q

BF inc in ___ during simple finger flexion

A

primary sensory and motor cortices

41
Q

BF inc in ___ during sequential finger mvmts

A

medial motor cortices

42
Q

BF inc in ___ during imaging finger flexion

A

medial motor cortices

43
Q

lateral motor imagines or observes action?

A

observes

44
Q

medial motor imagines or observes action?

A

imagines

45
Q

where is lesion btwn in decerebrate rigidity?

A

pons and midbrain (mesencephalon)

46
Q

where is lesion btwn in decorticate rigidity?

A

above red nuclei

Neuroanatomy-spring'16 (18 decks)

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