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MED 412_2021 > Neuroanatomy 3- Spinal cord > Flashcards

Neuroanatomy 3- Spinal cord Flashcards

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4
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82 year old female with chronic low back pain radiating to both legs. Pain is relieved when she leans forward or rests.

What is the abnormality and what could be the underlying cause?

A

L4/L5 Disc herniation and compression of the spinal nerves

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5
Q

The ____ _____and brainstem are supplied by the _______-_______ ______. The _______ is supplied by both the vertebral-basilar system and ______ _______ system.

A

The spinal cord and brainstem are supplied by the vertebral-basilar system. The cortex is supplied by both the vertebral-basilar system and internal carotid system.

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6
Q

All along the spinal cord you can find ____ anterior spinal artery and____ posterior spinal arteries.

A

All along the spinal cord you can find one anterior spinal artery and two posterior spinal arteries.

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11
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12
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What space is highlighted

A

Epidural Space

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13
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What space is highlighted?

A

Subarachnoid space

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14
Q

What is the Filum Terminale made of and what is its function

A

Extension of the pia and supporting cells and it attaches to the caudal end of the spinal cord to coccyx

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15
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What is in the white mater

A

Ascending and descending tracts

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16
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Where are the sympathetic neurons located?

A

In the lateral horn of spinal cord T1-L2

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17
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Where are the parasympathetic neurons located

A

CN 3,7,9,10 in the brainstem and in the lateral horn of S2,3,4

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18
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Green: substantia gelatinosa

Blue: Lissaur’s tract

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19
Q

which part of the spinal cord has the most white matter

A

Cervical

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20
Q

What type fo motor neurons are in the Lateral grey horn

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21
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Which part of the spinal cord has the most grey matter

A

Sacral spine

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22
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23
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1) Fibres carrying Pain and temp information enter in the ______. _______
2) Fibers travel up and down _______ _______
3) The first synapses occur in the ______ _______ of the posterior horn
4) These 2nd order neurons now cross the midline in the _____ ___ ______ and ascend inthe spinothalamic tract

A

1) Fibres carrying Pain and temp information enter in the posterior horn
2) Fibers travel up and down Lissauer’s tract
3) The first synapses occur in the substantia gelatinosa of the posterior horn
4) These 2nd order neurons now cross the midline in the Anterior white commissure and ascend inthe spinothalamic tract

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24
Q

What is the purple

A

Anterior white commissure

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25
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Where is this section from?

A
26
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A

Ligth blue: Nucleus Cuneatus

Dark blue: Fasciculus Cuneatus

27
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A

Light blue: Nucleus Gracilis

Dark Blue: Fasciculus Gracilis

28
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A

Yellow: Spinothalamic Tract

Pink: SPINOCEREBELLAR TRACT

29
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What is this a slice of

A
30
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A

Yellow : Spinothalamic tract

Pink: spinal cerebellar tract

Orange: lateral Corticospinal tract

Blue Fasciculus cuneatus

31
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A

Blue: Faciculus Gracillis

Orange: Anterior cortico spinal tract

32
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A

Orange: Pyramid

Red” internal arcuate fibers

33
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What is this

A

Superior medulla

34
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A

Yellow: Spinothalamic tract

Purple: medial lemniscus

Brown/Grey: medial longitudinal fasciculus

Pink: Spinocerebellar tract

Orange: Pyramid

35
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What is this a slice of?

A
36
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A

Purple: medial lemniscus

Brown/Grey: medial longitudinal fasciculus

Orange: Corticospinal fibers

37
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What is this a slice of

A
38
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A

Yellow: Spinothalamic tract

Purple: medial lemniscus

Brown/Grey: medial longitudinal fasciculus

39
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What is the function of the lateral corticospinal tract?

A

Skilled movement of the extremities

40
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What is the function of the anterior corticospinal tract

A

Postural adjustment and help stablize the body with muscles of the trunk

41
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42
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What is the blood supply of the anterior cortical spinal tract

A

THe anterior spinal artery

43
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What is the blood supply of the lateral corticospinal tract?

A

Posterior spinal arteris and the anterior spinal artery

44
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Where does the corticospinal tract originate from?

A

The motor cortex

45
Q

Where does the corticospianl tract decussate

A

85% of the fibers decussate in the medulla at the decussation of the pyramids and from the lateral(crossed 85% )and anterior corticospinal tract (15% uncrossed)

46
Q

Where does the fibres of the anterior corticospinal tract cross

A

THey cross at the midline in the spinal cord where they terminate at LMN

47
Q

Descending fibres of the corticospinal tract fROm the _____ _____ and converge to pass through the _______ ________of the ______ ______

A

Descending fibres of the corticospinal tract form the Corona Radiata and converge to pass through the posterior limb of the internal capsule

48
Q
A

Contralaterla hemiparesis

49
Q

what is the function posterior column medial lemniscus pathway

A

Discriminative touch

pressure

vibration

proprioception

50
Q

What spinal tracts are found in the fasciculus gracilis (somatotopic organization)

A

The sacral and lumbar regions of the spinal cord

51
Q

What is the blood supply of the Posterior column medial lemniscus pathway?

A

The posterior spinal arteries

52
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Secondary neurons of the posterior column-medial lemniscus pathway cross the midline as _____ _____

A

Secondary neurons of the posterior column-medial lemniscus pathway cross the midline as Arcuate fibres

53
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54
Q

What type if innervation does the internal urethral sphincter have?

A

Sympathetic

55
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What type if innervation does theDetrusor muscle have?

A

Parasympathetic S12,3,4

56
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  • What type if innervation does the External urethral sphincter have?
A

Somatic

57
Q

What centre in the pons coordinates the action of voiding?

A

Pontine micturition centre

58
Q

At rest/bladder filling the Pontine micturition centre _____ neurons with ________ actions and activates neurons with ________ innervation

A

At rest/bladder filling the Pontine micturition centre inhibits neurons with parasympathetic actions and activates neurons with Sypmathetic innervation

59
Q

Spastic bladder results from a lesion ______ T12

A

Spastic bladder results from a lesion above T12

60
Q

Flaccid bladder occurs a lesion _____ T12

A

Flaccid bladder occurs a lesion BELOW T12

61
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A

MED 412_2021 (12 decks)

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