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BDS2.5 Anatomy > Spinal Cord - grey and white matter (tracts) > Flashcards

Spinal Cord - grey and white matter (tracts) Flashcards

1
Q

What is ventral and what is dorsal?

A

A dorsal
B ventral

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2
Q
A

A dorsal root/horn

B ventral root/horn

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3
Q

What is white matter made up of?

A

Tracts

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4
Q

What are tracts?

A

Tracts are pathways

Axons transmitting information between higher centres in the brain and peripheral nerves

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5
Q

Are ascending pathways sensory or motor?

A

Sensory

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6
Q
A

A dorsal
B ventral

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7
Q

What is the majority of control of the body by the brain?

A

Contralateral

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8
Q

What is decussation?

A

Crossing

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9
Q

What is the role of the corona radiata?

A

Bundle of projection fibres connecting the cortices of the brain with the brainstem via the internal capsule

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10
Q

What do the first order neurones connect to?

A

Information to the spinal cord

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11
Q

What happens when the first order neurones reaches the spinal cord?

A

it crosses to the contralateral side

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12
Q

Where does the 2nd order neurone take information to?

A

Thalamus

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13
Q

What does the 3rd order neurone do?

A

Take info from thalamus to cerebral cortex

Through internal capsule to corona radiata

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14
Q

Does the ascending tracts always cross over at spinal cord?

A

No, can be higher up

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15
Q

where do the majority of descending texts cross over?

A

Medulla in pyramids

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16
Q

What do you call brain peripheral nerves?

A

Corticobulbar

17
Q

What do you call spinal peripheral nerves?

A

Corticospinal

18
Q

What do you call this tract

A
19
Q

What does this tract sense?

A

Pain and temp

20
Q

Name these dorsal columns

A
21
Q

What do the dorsal columns detect?

A

Fine touch
vibration
Conscious muscle
Joint sense

22
Q

Name these tracts

A

Anterior and posterior spinocerebellar

23
Q

What do these tracts detect?

A

Muscle and joint sense to cerebellum

24
Q

What are lemniscus?

A

A term used for some ascending (sensory) nerve tracts in the upper part of the medulla, pons, midbrain

25
Q
A
26
Q
A
27
Q
A

A facial
B abducent

28
Q

What neurone does the reflex arc use?

A

Inter neurone

29
Q

How many neurones do ascending tracts have in their pathway?

A

3

30
Q

How many neurones do descending neurones have in their pathway?

A

2

31
Q

What motor neuron is involved in reflexes?

A

Lower

32
Q

What has regulating effects on LMN reflexes?

A

UMN

33
Q

Can you have reflexes if the UMN is damaged?

A

YES

they are exaggerated

Tone is also increased = spasticity

BDS2.5 Anatomy (28 decks)

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