Spinal Cord Flashcards

1
Q

Second name of spinal cord

A

Medulla

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2
Q

In what structure do you find the spinal cord

A

the vertebral canal upper 2/3

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3
Q

Upper limits of spinal cord

A

Upper border of atlas

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4
Q

How is the end of the spinal cord called

A

Conus medullaris

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5
Q

Where does The spinal cord to terminate in adults

A

Between L1 and L2

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6
Q

Where does the spinal cord terminates at birth

A

L3

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7
Q

Length of spinal cord

A

45 cm long in European nails

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8
Q

What is a spinal cord segments

A

Portion from which a pair of spinal nerves emerge

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9
Q

How many spinal cord segments in the body

A

31

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10
Q

What are the different type of spinal cord segments

A
Eight cervical segment 
12 thoracic segments 
five number segment 
five sacral segment 
one coccygeal
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11
Q

How many spinal enlargement

A

2

1 cervical one lumbar

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12
Q

From where to where does the cervical enlargement extends to

A

From C3 to T2 with maximum- Circumference at c6

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13
Q

Where does the lumbar enlargement extends from

A

From L1 to S3

Maximum circumference at L3

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14
Q

What is the denticulate filament

A

Bilateral triangular lateral extensions of pia matter which anchor the spinal cord to the Dura matter

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15
Q

What is the filum terminale

A

Fibrous bands that extends from the conus medullaris to the posteriorieum of the coccyx which fixates stabilize and buffer the distal spinal cord

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16
Q

What is the spinal nerve roots

A

Part of the nerve that branches off from the spinal cord and enters into the intervertebral foramen

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17
Q

What are the different fissure of the spinal cord

A

deep anterior median Fissure

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18
Q

What are the different sulci of spinal cord

A

Posterior median sulcus
posterior lateral sulcus
posterior intermediate sulcus ( only cervical abd upper thoracic)

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19
Q

Is dorsal root sensory or motor

A

Sensory

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20
Q

Does the dorsal root have a ganglion

A

Yes

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21
Q

Is ventral root motor or sensory

A

Motor

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22
Q

What are the longest nerve root of the spinal cord

A

Lumbosacral roots

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23
Q

What forms the cauda equina

A

Lumbosacral roots in the lower part of the subarachnoid space

24
Q

Where is the grey mater and white matter of the spinal cord

A

Inner is gray matter

outer is white matter

25
Q

What is the gray matter of the spinal cord composed of

A

Nerve cells body
processes
neuroglia
blood vessels

26
Q

Where is the autonomic nervous system located in gray matter of spinal cord

A

Lateral horn in the thoracic and and upper lumbar region

27
Q

What link do white and left side of the gray matter

A

The gray commissure

28
Q

What determines the amount of gray matter in spinal cord

A

The amount of neurons presents at that level

29
Q

What is the hole in the middle of the grey mater

A

The central canal

30
Q

what are the nerve cell groups in the posterior column of the grey mater

A

Substantia gelatinosa
nucleus propius
nucleu’s dorsalis
visceral afferent nucleus

31
Q

What is Substantia gelatinosa

A

Fibers Carrying pain , touch, and temperature information synapse with small neuron fibers of Substantia gelatinosa to carry them to the brain
Also contain descending fibers from Supraspinal levels
Axons gives rise to contralateral spinothalamic tract

32
Q

What is the nucleus proprius

A

Receives proprioceptive fibers like position and movement and two points discrimination and vibration from posterior white column through the spinocerebellar tract

33
Q

What is nucleus dorsalis

A

Column from C8 to L3 which is associated with proprioceptive endings like neuromuscular and tendon spindle

34
Q

What is the visceral afferent nucleus

A

Medium sized cells which form columns from T1 to L3 located lateral to nucleus dorsalis and receives visceral afferent information

35
Q

Where does the Lateral gray column extends from

A

From T1 to L3

36
Q

What is the function of the lateral gray column

A

Give rise to preganglionic sympathetic fibers

37
Q

What do you find in the anterior Grey column

A

Lower motor neurons

of type alpha and gamma efferent neurons

38
Q

What do the alpha efferent nerves of the interior Grey column innervates

A

Skeleton muscles

39
Q

What do the gamma efferent nerves of the interior Grey column innervates

A

Ultrafusal muscle spindle

40
Q

What are the divisions of the Anterior Grey column

A

Medial
central group
lateral

41
Q

What does the medial division of the anterior grey column innervates

A

The axial musculature

42
Q

where is the central group Of the anterior curriculumlocated and what does it innervate

A

She 34 and five innervates phrenic nucleus
C1-c5 or c6 Innervates accessory nucleus of sternocleidomastoid and trapezius
Lumbo sacral nucleus L2 to S1

43
Q

Where is the Lateral division of the enter your great column located and what does innervate

A

Located in the cervical and lumbar sacral segments

innervates appendicular muscles dorsal flexors and ventral extensors

44
Q

Where do you find ascending tracts in the white matter

A

All funiculi

45
Q

Where do you find descending tracts in the white matter

A

In the Lateral and Anterior funiculi

46
Q

Where do you find fasciculus gracilis

A

In all segments of the cord

47
Q

Where do you find fasciculus cuneatus

A

In the upper thoracic and cervical

48
Q

Where does information of fasciculus Gracilis and cuneatu

A

In the Gracilis nucleus And cuneatus nucleus In the medulla oblongata

49
Q

What are the ascending tracts of the Lateral white matter

A

The Lateral spinothalamic tract
The dorsal spinocerebellar tract
The ventral spinocerebellar tract
The Spino olivary tract

50
Q

What are the ascending tracts of the anterior white matter

A

The ventral spinothalamic tract

51
Q

Where do the descending pathway of the spinal cord to the white matter arise from

A

From the cerebral cortex the corticospinal tract and the brain stem

52
Q

What are the function of the descending tracts going to the white matter of the spinal cord

A

Movements
muscle tone
posture
modulation the spinal reflexes activities

53
Q

What are the descending tracts of the white matter of the spinal

A
Lateral corticospinal tract 
ventral corticospinal tract 
rubrospinal track
Tectospinal tract 
vestibulospinal tract 
reticulo spinal tract
54
Q

What blood vessel supply the spinal cord

A

The anterior and posterior spinal arteries which branch of vertebral artery

The radicular or segmental medullary arteries which are branches of the intercoastal lumbar and lateral sacral arteries

55
Q

Dural sac Which is enlargement of subarachnoid space and id present at the l1-l2 level

A

Lumbar cistern

56
Q

Sites of lumbar puncture

A

Lumbar cistern