Neuroanatomy Revision Night: Spinal Tracts Flashcards

1
Q

2 main ascending tracts?

A

DCML

spinothalamic

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2
Q

if a tract starts with “spino” is it an ascending or descending tract?

A

usually ascending

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3
Q

where does the first order neuron in DCML end?

A

medulla

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4
Q

where does the 2nd order neuron in DCML end?

A

ventral posterolateral nucleus

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5
Q

where does the 3rd order neuron in DCML end?

A

postcentral gyrus

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6
Q

anything above T6 enters through the fasciculus ___ of the DCML tract

A

cuneatus

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7
Q

anything above T6 enters through the fasciculus ___ of the DCML tract

A

gracilis

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8
Q

what order neuron performs the horizontal decussation seen in the spinothalamic tract?

A

2nd order

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9
Q

all sensory tracts synapse in the thalamus T or F

A

T

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10
Q

what is the 3rd main ascending tract

A

spinocerebellar

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11
Q

pyramidal tracts originate from…

A

precentral gyrus

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12
Q

extrapyramidal tracts originate from..

A

the brainstem

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13
Q

pyramids are located?

A

lower medulla

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14
Q

what part of the corticospinal tract decussates segmentally ie NOT AT THE PYRAMIDS?

A

anterior

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15
Q

corticobulbar tract controls….

A

eyes

tongue

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16
Q

what are the only nerves to not have bilateral corticobulbar fibres

A

lower part of facial
hypoglossal nerve
these only get contralateral

17
Q

name the 4 extrapyramidal tracts?

A

vestibulospinal
tectospina
reticulospinal
rubrospinal

18
Q

tract for supply of anti-gravity muscles?

A

vestibulospinal

19
Q

origin of tectospinal tract

A

tectum of midbrain

20
Q

origin of rubrospinal tract

A

red nucleus in midbrain

21
Q

reticulospinal excites/inhibits extensors and excites/inhibits flexors

A

rEticulospinal Excites Extensors

inhibits flexors

22
Q

rubrospinal excites/inhibits extensors and excites/inhibits flexors

A

inhibits extensors and excites flexors

23
Q

what kind of posturing is a result of the reticulospinal tract

A

decerebrate posturing

24
Q

what happens in a complete cord injury?

A

complete loss of sensory and motor innervation below the lesion

25
Q

presentation of central cord syndrome

A

upper limb and not lower limb weakness as well as some sensory loss due to laceration of the medial corticospinal tract

26
Q

presentation of BS syndrome

A

contralateral loss of pain and temp (segmental crossing of spinothalamic)
ipsilateral loss of touch and vibration (DCML)
ipsilateral loss of motor function (corticospinal)

27
Q

presentation of anterior cord syndrome

A

motor loss
pain and temp loss
sparing of proprioception

28
Q

most common cause of anterior cord syndrome

A

anterior spinal cord infarct

29
Q

what pathway is spared in anterior cord syndrome

A

DCML