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Neuroscience > Sensorimotor Tracts > Flashcards

Sensorimotor Tracts Flashcards

1
Q

what are the pyramidal tracts?

A

lateral and anterior corticospinal tracts

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2
Q

what are the extrapyramidal tracts?

A

rubrospinal, reticulospinal, and vestibulospinal tracts

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3
Q

what are the 2 spinocerebellar tracts?

A

posterior and anterior spinocerebellar tracts

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4
Q

which pathways are motor/descending/efferent?

A

pyramidal and extrapyramidal tracts

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5
Q

which tract contains the longest neurons in the body?

A

fasciculus gracilis

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6
Q

which tract is responsible for LE discriminative sensory?

A

fasciculus gracilis

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7
Q

what are the components of epicritic (discriminative) sensory?

A

deep touch, 2pt and vibration, conscious proprioception

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8
Q

where does fasciculus gracilis enter the spinal cord?

A

dorsal root ganglion

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9
Q

in what part of the spinal cord does fasciculus gracilis travel?

A

white matter of medial dorsal column pathway

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10
Q

where do the primary and secondary neurons synapse in fasciculus gracilis?

A

medulla

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11
Q

where does the secondary neuron of fasciculus gracilis crosses midline?

A

medulla

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12
Q

where do the secondary and tertiary neurons synapse in fasciculus gracilis?

A

thalamus

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13
Q

what is the ultimate destination of fasciculus gracilis?

A

sensory cortex

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14
Q

which tract does UE discriminative sensory, including fine touch, 2pt and vibration discrimination, conscious proprioception, stereognosis?

A

fasciculus cuneatus

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15
Q

with fasciculus cuneatus, where does the primary neuron enter the spinal cord?

A

dorsal root ganglion

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16
Q

with fasciculus cuneatus, where do the primary and secondary neurons synapse?

A

medulla

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17
Q

with fasciculus cuneatus, where does the secondary neuron cross midline?

A

medulla

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18
Q

with fasciculus cuneatus, where do the secondary and tertiary neurons synapse?

A

thalamus

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19
Q

with fasciculus cuneatus, where does the tertiary neuron ultimately end up?

A

sensory cortex

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20
Q

which tract is responsible for unconscious proprioception?

A

spinocerebellar tract

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21
Q

what are golgi tendon organs sensitive to?

A

pressure

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22
Q

what are muscle spindles sensitive to?

A

stretch

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23
Q

with the spinocerebellar tract, where does the primary neuron enter the spinal cord?

A

dorsal root ganglion

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24
Q

with the spinocerebellar tract, where does the primary neuron travel when heading towards the brain?

A

gray matter

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25
Q

with the spinocerebellar tract, where do the primary and secondary neurons synapse?

A

dorsal horn of spinal cord

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26
Q

with the spinocerebellar tract, where does the secondary neuron ultimately synapse?

A

inferior cerebellar peduncle

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27
Q

which tract is protopathic (protective) and detects pain and temperature?

A

lateral spinothalamic tract

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28
Q

what are the receptors that detect temperature?

A

free nerve endings

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29
Q

where does the lateral spinothalamic tract enter the gray matter of the spinal cord?

A

dorsal horn of spinal cord

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30
Q

with the lateral spinothalamic tract, where does the tract cross midline?

A

within gray matter of spinal cord

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31
Q

with the lateral spinothalamic tract, where do the primary and secondary neurons synapse?

A

within gray matter of spinal cord

32
Q

with the lateral spinothalamic tract, what does the secondary neuron travel through as it heads towards the thalamus?

A

lateral white matter

33
Q

with the lateral spinothalamic tract, where do the secondary and tertiary neurons synapse?

A

thalamus

34
Q

with the lateral spinothalamic tract, where does the tertiary neuron ultimately end up?

A

sensory cortex

35
Q

which tract is protopathic and detects coarse touch (pressure, pleasant touch, tickle, itch)?

A

ventral spinothalamic tract

36
Q

with the ventral spinothalamic tract, where does the primary neuron enter the spinal cord?

A

dorsal horn

37
Q

with the ventral spinothalamic tract, where does the tract cross midline?

A

within gray matter of spinal cord

38
Q

with the ventral spinothalamic tract, where do the primary and secondary neurons synapse?

A

within gray matter of spinal cord

39
Q

with the ventral spinothalamic tract, where do the secondary and tertiary neurons synapse?

A

thalamus

40
Q

with the ventral spinothalamic tract, where does the tertiary neuron ultimately synapse?

A

sensory cortex

41
Q

which tract is responsible for voluntary motor control and fractionation of movement?

A

corticospinal tract

42
Q

with the corticospinal tract, what is the origin of the primary neuron?

A

M1

43
Q

with the corticospinal tract, through what 2 structures does the primary neuron pass before entering the brainstem?

A

corona radiata, then internal capsule

44
Q

with the corticospinal tract, where do the primary and secondary neurons synapse?

A

medulla

45
Q

where does the corticospinal tract split to descend in 2 tracts?

A

medulla

46
Q

what are the 2 corticospinal tracts of the secondary neuron?

A

ventral and lateral corticospinal tracts

47
Q

10-20% of fibers of the corticospinal tract stay ipsilateral with this tract

A

ventral corticospinal tract

48
Q

80-90% of fibers of the corticospinal tract cross contralaterally with this tract

A

lateral corticospinal tract

49
Q

where does the secondary neuron of the ventral corticospinal tract ultimately synapse?

A

ventral horn of spinal cord

50
Q

with the lateral corticospinal tract, where do the secondary and tertiary neurons synapse?

A

ventral horn

51
Q

with the lateral corticospinal tract, at what point does the UMN synapse with the LMN?

A

synapse of secondary and tertiary neurons in ventral horn

52
Q

with the lateral corticospinal tract, where does the tertiary neuron ultimately synapse?

A

effector muscle

53
Q

which tract extends the wrist and fingers?

A

rubrospinal tract

54
Q

with the rubrospinal tract, what is the origin of the primary neuron?

A

red nucleus of midbrain

55
Q

where does the rubrospinal tract cross midline?

A

midbrain

56
Q

with the rubrospinal tract, through what does the primary neuron travel as it descends?

A

lateral column

57
Q

with the rubrospinal tract, where do the primary and secondary neurons synapse?

A

ventral horn

58
Q

with the rubrospinal tract, where does the secondary neuron ultimately synapse?

A

effector muscle

59
Q

with the reticulospinal tract, what is the origin of the primary neuron?

A

midbrain

60
Q

which tract is responsible for postural control, overall muscle tone, bilateral motor control, and arousal?

A

the reticulospinal tract

61
Q

what is the structure in the brainstem that belongs to the reticulospinal tract?

A

reticular formation

62
Q

at what point does the reticulospinal tract become 2 pathways?

A

ventral horn

63
Q

which pathway of the reticulospinal tract is responsible for control of antigravity extension (posture)?

A

medial reticulospinal tract

64
Q

which pathway of the reticulospinal tract is responsible for control of axial extension (bilateral gross motor, stepping pattern generator)?

A

lateral reticulospinal tract

65
Q

where does the primary neuron of the medial reticulospinal tract ultimately synapse?

A

white matter of spinal cord

66
Q

with the lateral reticulospinal tract, where do the primary and secondary neurons synapse?

A

white matter of spinal cord

67
Q

with the lateral reticulospinal tract, where does the secondary neuron ultimately synapse?

A

effector muscle (leg)

68
Q

which tract is responsible for balance, posture, and head stabilization?

A

vestibulospinal tract

69
Q

which pathway of the vestibulospinal tract controls the neck and upper back?

A

medial vestibulospinal tract

70
Q

which pathway of the vestibulospinal tract controls the trunk and lower back posture?

A

lateral vestibulospinal tract

71
Q

with BOTH vestibulospinal tracts, where do the primary neurons originate?

A

medulla

72
Q

with the medial vestibulospinal tract, where do the primary and secondary neurons synapse?

A

ventral horn

73
Q

with the medial vestibulospinal tract, where does the secondary neuron ultimately synapse?

A

neck/upper back

74
Q

with the lateral vestibulospinal tract, where do the primary and secondary neurons synapse?

A

ventral horn

75
Q

with the lateral vestibulospinal tract, were does the secondary neuron ultimately synapse?

A

trunk/lower back

Neuroscience (7 decks)

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