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Neuroanatomy Exam 2 Class Focus > Major Pathways Chart > Flashcards

Major Pathways Chart Flashcards

1
Q

Classes of Spinal Cord Tracts (4)

A
  1. Ascending Sensory Tracts
  2. Cortically Originated Descending Motor Tracts
  3. Mixed Pathways Originating From Brainstem
  4. Descending Motor Pathways Originating In Brainstem
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2
Q

Ascending Sensory Tracts (7)

A
  1. Dorsal Columns
  2. Lateral Spinothalamic Tract
  3. Anterior Spinothalamic Tract
  4. Posterior Spinocerebellar Tract
  5. Anterior Spinocerebellar Tract
  6. Cuneocerebellar Tract
  7. Rostral Spinocerebellar Tract
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3
Q

Dorsal Columns - Function

A

CONSCIOUS SENSORY INFORMATION to cortex:discriminative touch, pressure, vibration, proprioception, kinesthesia

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4
Q

Dorsal Columns - Origin

A

nucleus gracilis and nucleus cuneatus

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5
Q

Dorsal Columns - Decussation

A

caudal medulla level

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6
Q

Dorsal Columns - Destination

A

postcentral gyrus

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7
Q

Lateral Spinothalamic Tract - Function

A

CONSCIOUS SENSORY INFORMATION to cortex:pain and temperature

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8
Q

Lateral Spinothalamic Tract - Origin

A

dorsal horn (nucleus proprius)

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9
Q

Lateral Spinothalamic Tract - Decussation

A

at spinal cord level

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10
Q

Lateral Spinothalamic Tract - Destination

A

postcentral gyrus

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11
Q

Anterior Spinothalamic Tract - Function

A

CONSCIOUS SENSORY INFORMATION to cortex:crude touch, light touch (possible pain/temp info if Lateral Spinothalamic Tract is damaged)

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12
Q

Anterior Spinothalamic Tract - Origin

A

dorsal horn (nucleus proprius)

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13
Q

Anterior Spinothalamic Tract - Decussation

A

at spinal cord level

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14
Q

Anterior Spinothalamic Tract - Destination

A

postcentral gyrus

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15
Q

Posterior Spinocerebellar Tract - Function

A

UNCONSCIOUS SENSORY INFORMATION from LE to cerebellumpressure/tension of skeletal musclescoordination of motoric movement of individual muscles

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16
Q

Posterior Spinocerebellar Tract - Origin

A

Clark’s column in dorsal horn levels T6 and below

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17
Q

Posterior Spinocerebellar Tract - Decussation

A

no decussation

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18
Q

Posterior Spinocerebellar Tract - Destination

A

cerebellum

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19
Q

Anterior Spinocerebellar Tract - Function

A

UNCONSCIOUS SENSORY INFORMATION from LE to cerebellumpressure/tension of skeletal musclescoordination of posture and movement of limbs

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20
Q

Anterior Spinocerebellar Tract - Origin

A

dorsal horn (nucleus proprius)

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21
Q

Anterior Spinocerebellar Tract - Decussation

A

at spinal cord level

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22
Q

Anterior Spinocerebellar Tract - Destination

A

cerebellum

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23
Q

Cuneocerebellar Tract - Function

A

UNCONSCIOUS SENSORY INFORMATION from trunk and UEs to cerebellumpressure/tension of skeletal musclescoordination of motoric movement of individual muscles

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24
Q

Cuneocerebellar Tract - Origin

A

nucleus cuneatus T6 and above

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25
Q

Cuneocerebellar Tract - Decussation

A

no decussation

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26
Q

Cuneocerebellar Tract - Destination

A

cerebellum

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27
Q

Rostral Spinocerebellar Tract - Function

A

UNCONSCIOUS SENSORY INFORMATION from trunk and UEs to cerebellumpressure/tension of skeletal musclescoordination of posture and movement of limbssensory information from MSs, GTOs, and joint receptors

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28
Q

Rostral Spinocerebellar Tract - Origin

A

ventrolateral gray matter at cervical levels

29
Q

Rostral Spinocerebellar Tract - Decussation

A

no decussation

30
Q

Rostral Spinocerebellar Tract - Destination

A

cerebellum

31
Q

Cortically Originated Descending Motor Tracts (3)

A
  1. Lateral Corticospinal Tract
  2. Anterior Corticospinal Tract
  3. Corticobulbar Tract
32
Q

Lateral Corticospinal Tract - Function

A

CONSCIOUS VOLUNTARY MOTOR INFORMATION from precentral gyrus up to ventral horn

33
Q

Lateral Corticospinal Tract - Origin

A

precentral gyrus

34
Q

Lateral Corticospinal Tract - Decussation

A

pyramidal decussation in medulla

35
Q

Lateral Corticospinal Tract - Destination

A

synapses on interneuron in ventral horn

36
Q

Anterior Corticospinal Tract - Function

A

CONSCIOUS VOLUNTARY MOTOR INFORMATION from precentral gyrus up to ventral horn

37
Q

Anterior Corticospinal Tract - Origin

A

precentral gyrus

38
Q

Anterior Corticospinal Tract - Decussation

A

no decussation

39
Q

Anterior Corticospinal Tract - Destination

A

synapses on interneuron in ventral horn

40
Q

Corticobulbar Tract - Function

A

control CN lower motor neurons (3, 4, 6, 5, 7, 9, 10, 11, 12)

41
Q

Corticobulbar Tract - Origin

A

precentral gyrus

42
Q

Corticobulbar Tract - Decussation

A

no decussation

43
Q

Corticobulbar Tract - Destination

A

cranial nerve nuclei

44
Q

Mixed Pathways Originating From Brainstem (2)

A
  1. Descending Fibers of Medial Longitudinal Fasciculus

2. Ascending Fibers of Medial Longitudinal Fasciculus

45
Q

Descending Fibers of Medial Longitudinal Fasciculus - Function

A

Exerts inhibitory effect on motor neurons of ventral horn in cervical spinal cord (allows for coordination of head/neck movements)

46
Q

Descending Fibers of Medial Longitudinal Fasciculus - Origin

A

vestibular nuclei

47
Q

Descending Fibers of Medial Longitudinal Fasciculus - Decussation

A

no decussation

48
Q

Descending Fibers of Medial Longitudinal Fasciculus - Destination

A

spinal nerves in PNS that innervate head and neck muscles

49
Q

Ascending Fibers of Medial Longitudinal Fasciculus - Function

A

Visual tracking of a moving object through coordinated movements of head, eyes, and neck

50
Q

Ascending Fibers of Medial Longitudinal Fasciculus - Origin

A

vestibular nuclei

51
Q

Ascending Fibers of Medial Longitudinal Fasciculus - Decussation

A

no decussation

52
Q

Ascending Fibers of Medial Longitudinal Fasciculus - Destination

A

nuclei of CN III, CN IV, and CN VI

53
Q

Descending Motor Pathways Originating In the Brainstem (4)

A
  1. Vestibulospinal Tract
  2. Rubrospinal Tract
  3. Medullary Reticulospinal Tract
  4. Pontine Reticulospinal Tract
54
Q

Vestibulospinal Tract - Function

A

extrapyramidal pathway, facilitation of antigravity (extensor) muscles, for posture and stance

55
Q

Vestibulospinal Tract - Origin

A

vestibular nuclei

56
Q

Vestibulospinal Tract - Decussation

A

no decussation

57
Q

Vestibulospinal Tract - Destination

A

extensor muscle groups in PNS

58
Q

Rubrospinal Tract - Function

A

exrapyramidal tract that facilitates antagonists of antigravity muscles causing facilitation of flexor muscle groups

59
Q

Rubrospinal Tract - Origin

A

red nucleus

60
Q

Rubrospinal Tract - Decussation

A

at midbrain level

61
Q

Rubrospinal Tract - Destination

A

innervation of flexor muscles in the limbs

62
Q

Medullary Reticulospinal Tract - Function

A

extrapyramidal tract inhibits extensor tone, depresses CV responses (BP/HR) and the inspiratory phase of respiration

63
Q

Medullary Reticulospinal Tract - Origin

A

medullary reticular formation

64
Q

Medullary Reticulospinal Tract - Decussation

A

mostly not decussated

65
Q

Medullary Reticulospinal Tract - Destination

A

extensor muscles in PNS

66
Q

Pontine Reticulospinal Tract - Function

A

extrapyramidal tract facilitates extensor tone

67
Q

Pontine Reticulospinal Tract - Origin

A

pontine reticular formation

68
Q

Pontine Reticulospinal Tract - Decussation

A

no decussation

69
Q

Pontine Reticulospinal Tract - Destination

A

extensor muscles in PNS

Neuroanatomy Exam 2 Class Focus (12 decks)

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