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Neurosci Final > SPC Organization > Flashcards

SPC Organization Flashcards

1
Q

How many SPC segments?

A

31 (c8-t12-l5-s5-c1)

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2
Q

Where are preganglionic sympathetic neurons (lateral horn) located?

A

T1-L2

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3
Q

The biceps reflex tests the integrity of what cord segments?

A

C5-6

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4
Q

The triceps reflex tests the integrity of what cord segments?

A

C7-8

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5
Q

The knee-jerk reflex tests the integrity of what cord segments?

A

L3-4

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6
Q

The ankle-jerk reflex tests the integrity of what cord segments?

A

S1-2

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7
Q

Myotatic reflexes consist of how many neurons?

A

2 neurons (monosynaptic)

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8
Q

What is likely damaged in diminished deep tendon reflex? Exaggerated DTR?

A

Afferent / Efferent limb

UMN

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9
Q

The dorsal columns are ipsilateral or contralateral information?

A

Ipsilateral

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10
Q

The DCML ends in what thalamic nucleus?

A

VPL

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11
Q

Visceral pain is transmitted via _

A

The DCML

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12
Q

The Romberg test is an assessment of what pathway?

A

DCML (propioception)

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13
Q

Lissaur’s tract is _. How does this affect the location of a lesion?

A

A tract where 1st order spinothalamic neurons ascend before synapsing.
The signs are seen 1-2 levels below the lesion

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14
Q

Lesion of the spinal cord anterior commissure results in _? what is an example of this sort of lesion?

A

Bilateral loss of pain and temp

Syringomyelia

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15
Q

There are 3 spino-cerebellar tracts. They are _ and what are their functions?

A 
Dorsal spinocerebellar (Lower limb)
Cuneocerebella (Upper limb)
Ventral spinocerebellar (GTO of lower limb)
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16
Q

All the spinocerebellar tracts are ipsilateral. Which one crosses twice?

A

Ventral spino-cerebellar tract

17
Q

The hypothalamospinal pathway does what? What happens when it is damaged?

A

Autonomic control.

Horner’s syndrome

18
Q

Disc herniation, spondylosis, tumors, dislocation and fluorosis can all cause _

A

Spinal stenosis

19
Q

Disc herniation causes pain by _

What transmits this pain?

A

Activating nociceptors in the disc and vertebral periosteum.
Sympathetic afferents

20
Q

When C6/7 herniation occur, what nerve is affected? What about L5/S1?

A

C7
S1
Lower seems to be affected

21
Q

The dorsal columns of the SPC receieve blood from _? What about the motor areas in the anterior cord?

A

Posterior spinal artery
Anterior spinal artery
See PPT slide 3

22
Q

A lesion compressing the lateral spinal cord will affect _. What level is first affected?

A

Lateral corticospinal tract.
Sacral affected first
Think they are peeling off into SPC, cervical peels off first

23
Q

A lesion compressing the middle SPC will affect _ first?

A

Upper limbs, sacral sparing

24
Q

A central cord lesion like syringimyelia will cause what pattern of deficit?

A

In cervical area, cape like loss of pain and temp

25
Q

An anterior cord syndrome will cause _

A

Bilateral motor paralysis below the lesion

26
Q

A posterior cord lesion will cause _

A

Loss of 2 pt. discrimination, vibratory sense, position sense and + Romberg

27
Q

What is cauda equina syndrome?

A

LMN signs in the leg and foot

28
Q

What is conus medullaris syndrome?

A

Loss of bladder, bowel and sexual function

29
Q

Lesions in the autonomic (sympathetic) neurons at or above T-2 result

A

Horner’s syndrome

30
Q

Lesions in the sacral autonomic (parasympathetic) neurons between S-2 and S-4

A

bladder and bowel dysfunction

31
Q

Corticospinal tract lesions produce

A

upper motor neuron signs

32
Q

Ventral horn lesions produce

A

lower motor neuron signs

33
Q

Lesions of the cauda equina manifest with

A

ipsilateral sensory and lower motor neuron–type signs

34
Q

Lesions of the conus medullaris are characterized by

A

bladder and bowel dysfunction, sexual dysfunction, perianal sensory loss, and upper motor neuron signs

Neurosci Final (12 decks)

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