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ILA > Brown Sequard > Flashcards

Brown Sequard Flashcards

1
Q

What is brown sequard syndrome?

A

Incomplete spinal cord injury
Hemisection to spinal cord

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2
Q

What is typical presentation of BSS?

A
  • paralysis on ipsilateral below- compromise lateral corticospinal tract
  • loss ipsilateral proprioception and vibration- compromise DCML
  • loss pain and temp sensation contralateral to lesion- compromise spinothalamic (decussate spinal cord)
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3
Q

What makes up brainstem?

A

Midbrain, pons, medulla

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4
Q

Where does fine touch decussate?

A

Medulla

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5
Q

Where does pain and temp decussate?

A

Spinal cord

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6
Q

Where does motor signal decussate?

A

Medulla

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7
Q

Draw tract BBS?

A
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8
Q
A
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9
Q

Explain what is injured in Brown Sequard Syndrome?

A

Corticospinal tract
Loss UMN innervation- ipsilateral paralysis below lesion

DCML
Ipsilateral loss vibration, proprioception, fine touch

Spinothalamic
Contralateral loss pain, temperature
2-3 lvls below lesion

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10
Q

Give 3 causes of BSS?

A

Spinal fractures
Gunshot wounds
Stab wounds
Tumours
Inflammatory disease

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11
Q

What does spinothalamic carry?

A

Lateral- pain and temperature
Anterior- crude touch

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12
Q

State 2 ascending tracts and 1 descending tract?

A

2 ascending
Spinothalamic and DCML

1 descending
DCML

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13
Q

What does DCML carry?

A

Pressure, vibration, fine touch and proprioception

Fasiculus gracilis- lower trunk and legs
Fasciculus cuneatus- upper trunk and legs

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14
Q

What does corticospinal tract carry?

A

Motor brain- muscles
Voluntary muscle movement

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15
Q

How many neurons in sensory? DCML

A

3 neurons
1st order ascend spinal cord to medulla
2nd order decussate at medulla to thalamus
3rd order to primary somatosensory

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16
Q

How many neurons in corticospinal?

A

2
UMN decussate medulla and travel down
Synapse LMN

17
Q

How many neurons in spinothalamic?

A

3
1st order neuron- pain and temp carry to dorsal root ganglion
2nd order- ascend 1-2 spinal segment- decussate and travel up spinal cord
3rd order- thalamus to sensory cortex

18
Q

Complete right hemisection?

A

Ipsilateral paralysis due corticospinal
Ipsilateral loss fine touch, pressure, vibration and ppt due DCML

Contralateral loss pain, temp crude touch 1-2 below lesion due spinothalamic
At lesion all

ILA (12 decks)

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