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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
Cuneocerebellar Tract - Decussation
no decussation
26
Cuneocerebellar Tract - Destination
cerebellum
27
Rostral Spinocerebellar Tract - Function
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
28
Rostral Spinocerebellar Tract - Origin
ventrolateral gray matter at cervical levels
29
Rostral Spinocerebellar Tract - Decussation
no decussation
30
Rostral Spinocerebellar Tract - Destination
cerebellum
31
Cortically Originated Descending Motor Tracts (3)
1. Lateral Corticospinal Tract 2. Anterior Corticospinal Tract 3. Corticobulbar Tract
32
Lateral Corticospinal Tract - Function
CONSCIOUS VOLUNTARY MOTOR INFORMATION from precentral gyrus up to ventral horn
33
Lateral Corticospinal Tract - Origin
precentral gyrus
34
Lateral Corticospinal Tract - Decussation
pyramidal decussation in medulla
35
Lateral Corticospinal Tract - Destination
synapses on interneuron in ventral horn
36
Anterior Corticospinal Tract - Function
CONSCIOUS VOLUNTARY MOTOR INFORMATION from precentral gyrus up to ventral horn
37
Anterior Corticospinal Tract - Origin
precentral gyrus
38
Anterior Corticospinal Tract - Decussation
no decussation
39
Anterior Corticospinal Tract - Destination
synapses on interneuron in ventral horn
40
Corticobulbar Tract - Function
control CN lower motor neurons (3, 4, 6, 5, 7, 9, 10, 11, 12)
41
Corticobulbar Tract - Origin
precentral gyrus
42
Corticobulbar Tract - Decussation
no decussation
43
Corticobulbar Tract - Destination
cranial nerve nuclei
44
Mixed Pathways Originating From Brainstem (2)
1. Descending Fibers of Medial Longitudinal Fasciculus | 2. Ascending Fibers of Medial Longitudinal Fasciculus
45
Descending Fibers of Medial Longitudinal Fasciculus - Function
Exerts inhibitory effect on motor neurons of ventral horn in cervical spinal cord (allows for coordination of head/neck movements)
46
Descending Fibers of Medial Longitudinal Fasciculus - Origin
vestibular nuclei
47
Descending Fibers of Medial Longitudinal Fasciculus - Decussation
no decussation
48
Descending Fibers of Medial Longitudinal Fasciculus - Destination
spinal nerves in PNS that innervate head and neck muscles
49
Ascending Fibers of Medial Longitudinal Fasciculus - Function
Visual tracking of a moving object through coordinated movements of head, eyes, and neck
50
Ascending Fibers of Medial Longitudinal Fasciculus - Origin
vestibular nuclei
51
Ascending Fibers of Medial Longitudinal Fasciculus - Decussation
no decussation
52
Ascending Fibers of Medial Longitudinal Fasciculus - Destination
nuclei of CN III, CN IV, and CN VI
53
Descending Motor Pathways Originating In the Brainstem (4)
1. Vestibulospinal Tract 2. Rubrospinal Tract 3. Medullary Reticulospinal Tract 4. Pontine Reticulospinal Tract
54
Vestibulospinal Tract - Function
extrapyramidal pathway, facilitation of antigravity (extensor) muscles, for posture and stance
55
Vestibulospinal Tract - Origin
vestibular nuclei
56
Vestibulospinal Tract - Decussation
no decussation
57
Vestibulospinal Tract - Destination
extensor muscle groups in PNS
58
Rubrospinal Tract - Function
exrapyramidal tract that facilitates antagonists of antigravity muscles causing facilitation of flexor muscle groups
59
Rubrospinal Tract - Origin
red nucleus
60
Rubrospinal Tract - Decussation
at midbrain level
61
Rubrospinal Tract - Destination
innervation of flexor muscles in the limbs
62
Medullary Reticulospinal Tract - Function
extrapyramidal tract inhibits extensor tone, depresses CV responses (BP/HR) and the inspiratory phase of respiration
63
Medullary Reticulospinal Tract - Origin
medullary reticular formation
64
Medullary Reticulospinal Tract - Decussation
mostly not decussated
65
Medullary Reticulospinal Tract - Destination
extensor muscles in PNS
66
Pontine Reticulospinal Tract - Function
extrapyramidal tract facilitates extensor tone
67
Pontine Reticulospinal Tract - Origin
pontine reticular formation
68
Pontine Reticulospinal Tract - Decussation
no decussation
69
Pontine Reticulospinal Tract - Destination
extensor muscles in PNS

Neuroanatomy Exam 2 Class Focus (12 decks)

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