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Formative Revision > Neuro spinal tracts > Flashcards

Neuro spinal tracts Flashcards

1
Q

At what level does the spinal cord end?

A

L1/L2

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2
Q

What are the major sensory spinal tracts? (2)

A

DCML

Spinothalamic

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3
Q

What does DCML sense? (3)

A

Fine touch
Vibration
Proprioception

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4
Q

What is the big spinal tract at the posterior of the spinal cord?

A

DCML

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5
Q

What are the two parts of the Spinothalamic tract? (2)

A

Anterior (Crude touch)

Lateral (Pain& temperature)

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6
Q

Where does the DCML decussate?

A

Brainstem

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7
Q

Where does the Spinothalamic tract decussate?

A

Immediately on entering spinal cord

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8
Q

What is the difference in decussation between the DCML and Spinothalamic tract?

A

Spinothalamic tract decussates immediately on entering spinal cord

DMCL decussates in brainstem

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9
Q

What does the Anterior Spinothalamic tract sense?

A

Crude touch

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10
Q

What does the Lateral Spinothalamic tract sense? (2)

A

Pain

Temperature

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11
Q

What are the main motor tracts? (2)

A

Corticospinal (spine > body > muscles)

Corticobulbar (bulb > head > cranial nerves)

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12
Q

Where does the Corticobulbar Tract end?

A

Brainstem

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13
Q

What does the Corticobulbar Tract innervate?

A

Motor function of cranial nerve muscles

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14
Q

What are the two parts of the Corticospinal Tract? (2)

A

Anterior (axial muscles)

Lateral (Limb muscles)

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15
Q

What is innervated by the Anterior Corticospinal Tract?

A

Axial muscles

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16
Q

What is innervated by the Lateral Corticospinal Tract?

A

Limb muscles

17
Q

Babinski positive suggests a problem with which tract?

A

Corticospinal tract

18
Q

Describe Decorticate posturing (2)

A

Person stiff with flexed arms and wrists
Feet turned in

DeCORticate into their CORE

19
Q

Describe Decerebrate posturing

A

Person stiff with arms extended by their sides
Feet pointed down

Loads of E’s- Extended arms

20
Q

A lesion where causes Decerebrate posturing?

A

At or below Red nucleus

21
Q

A lesion where causes Decorticate posturing?

A

Above Red nucleus

22
Q

Is hyperreflexia an UMN or LMN sign?

A

UMN

23
Q

Is hyporeflexia an UMN or LMN sign?

A

LMN

24
Q

Why does Cauda Equina Syndrome always present with hyporeflexia?

A

Because it is due to LMN pathology

the Cauda Equina is all LMNs, it’s not part of the actual cord

25
Q

Which tract does patterns of movements?

A

Reticulospinal tract

26
Q

What is Syringomyelia?

A

Cyst growing in central canal of spinal cord

Blocks spinothalamic decussation at that level,
therefore bilateral touch/pain/temperature sensory loss

27
Q

What pattern of sensory loss is seen in Syringomyelia?

A

Cape-like pattern

Loss of touch, pain & temperature sensation

28
Q

Cape-like pattern of sensory loss suggests what?

A

Syringomyelia

29
Q

Syringomyelia involves sensory loss. What sensation is spared?

A

Fine touch
Vibration
Proprioception

(DCML is spared)

30
Q

Syringomyelia involves sensory loss. What sensation is lost?

A

Crude touch
Pain
Temperature

(bilaterally, due to interruption of spinothalamic tract decussation)

31
Q

What spinal cord tract moves the head in response to auditory and visual stimuli?

A

Tectospinal tract

32
Q

Are Myelinated nerves found in grey or white matter?

A

White

33
Q

Which fasciculus of the DCML carries sensory information from the upper limb?

A

Cunate

C top Gracile bottom

34
Q

Which fasciculus of the DCML carries sensory information from the lower limb?

A

Gracile

C top Gracile bottom

35
Q

Another name for the Primary Motor Cortex?

A

Precentral Gyrus

Act first Feel after
not Postcentral because Postcentral- more Posterior

36
Q

Another name for the Primary Sensory Cortex?

A

Postcentral Gyrus

Act first Feel after
Postcentral- more Posterior

37
Q

Where is the Red Nucleus?

A

Midbrain (at same level as the temporal lobe wings)

Formative Revision (50 decks)

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