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brain and behaviour > spinal cord and tracts > Flashcards

spinal cord and tracts Flashcards

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1
Q

what are the meninges

A

dura arachnoid
pia

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2
Q

how is dura in head

A

attached to skull

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3
Q

how is dura in cns

A

loose - space around

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4
Q

what is in the epidural space

A

fat and veinous drainage

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5
Q

what is defining feature of arachnoid

A

spidery projections onto pia

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6
Q

where do you get csf from

A

sub-arachnoid space

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7
Q

what is in subarachnoid space

A

csf

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8
Q

what might lumbar puncture test for

A

meningitis

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9
Q

what is in grey matter

A

cell bodies, synapses

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10
Q

what is in white matter

A

myelinated stuff ie axons

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11
Q

what are the areas of white matter called

A

funiculi

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12
Q

how many funiculi are there

A

3

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13
Q

what are the funiculi names

A

posterior lateral anterior

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14
Q

where do sensory nerves go in

A

dorsal horn

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15
Q

where do motor nerves come out

A

ventral horn

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16
Q

defining feature of cervical area spinal column transverse section

A

lots of white, large dorsal and ventral horns of grey

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17
Q

where is cauda equina

A

below l1/2

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18
Q

how do find l1

A

one vertebra below last rib

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19
Q

where do vertebral arteries come off

A

subclavian

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20
Q

where do vertebral arteries run

A

Transverse foramina

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21
Q

what do 2 vertebral arteries joining together in brain make

A

basilar artery

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22
Q

vertebral arteries also supply what going downwards?

A

anterior and posterior spinal arteries

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23
Q

anterior and post spinal arteries are really tiny,. how are they helped out?

A

intercostal arteries feed into them

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24
Q

What is the defining feature of thoracic spinal cord in transverse section

A

lateral horn of grey matter

25
Q

where does spinothalamic tract decussate

A

at the level of spinal cord it enters

26
Q

sensations of spinothalamic tract

A

crude pain. temperature

27
Q

where is spinothalamic tract

A

anterior, slightly lateral

28
Q

what is pain sensation called

A

nociception

29
Q

what is a nociceptor

A

pain receptor

30
Q

what are the 2 types of spinothalamic receptors

A

A-delta
C

31
Q

where do 2ary spinothalamic neurones go

A

nucleus proprius to thalamus

32
Q

where do 3ary A delta spinothalamic neurones go

A

thalamus to primary somatosensory cortex

33
Q

what do A delta fibres feel

A

fast pain, accurate location and duration of pain, sharp

34
Q

what do C fibres feel

A

slow pain, lots of activations, intensity=action potentials

35
Q

what are 4 spinothalamic receptor types

A

thermo- mechano- chemico- polymodal

36
Q

where is the A delta fibres

A

lateral STT

37
Q

where are the C fibres

A

anterior STT

38
Q

where is the anterior STT thalamic relay

A

intralaminar nuclei of thalamus

39
Q

where does 3ary C fibres go (4)

A

intralaminar nucleus of thalamus to 2ary somatosensory cortex

parabrachial nucleus of pons -> limbic system

posterior medial nucleus of thalamus -> arousal/focus

midbrain reticular formation -> spinal reflexes

40
Q

where does shingles live

A

sensory dermatomes

41
Q

what is the blood supply to the STT

A

anterior spinal artery

42
Q

which is the only tract supplied by the anterior spinal artery

A

STT

43
Q

what are the functions of the DCML

A

light touch, proprioception, 2 point discrimination, vibration

44
Q

where do you take lumbar puncture

A

subarachnoid space - csf l4/l5

45
Q

where to you take epidural?

A

outside dura mater

46
Q

where does DCML decussate

A

lower medulla

47
Q

what are the decussation fibres of DCML called

A

internal arcuate

48
Q

what is the DCML tract up to the brain caleld

A

medial lemniscus

49
Q

what does the D of DCML refer to

A

DORSAL bit of spinal column

50
Q

what are the two fasciculi of DCML and where do they come from

A

gracilis, medial, legs/genitalia
cuneatus, lateral, arms

51
Q

how do you test DCML proprioception? Name?

A

can you keep your balance with eyes closed? Romberg’s test

52
Q

what is spinocerebellar tract

A

spine->cerebellum

53
Q

where does spinocerebellar tract decussate

A

it doesn’t

54
Q

what does spinocerebellar tract function

A

unconscious propriception

55
Q

which important cranial nerve feeds into DCML

A

trigeminal

56
Q

where does VPM nucleus of the thalamus receive information from

A

nociception from head and face

57
Q

where does VPL receive information from

A

nociception from rest of body

58
Q

what is relay from thalamus to 1ary somatosensory cortex part of

A

internal capsule

59
Q

where have most DCML receptors

A

fingertips, lips, tongue

brain and behaviour (14 decks)

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