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CNS Anatomy > Anatomy Of Spinal Cord > Flashcards

Anatomy Of Spinal Cord Flashcards

1
Q

The spinal cord i suspended in the

A

Vertebral canal

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2
Q

The spinal cord is suspended in the vertebral canal & surrounded by

A

Meninges & CSF

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3
Q

Spinal cord length in adults is

A

45 cm

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4
Q

The spinal cord extends from the foramen magnum to (Adults)

A

L1 - L2

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5
Q

The spinal cord extends from the foramen magnum to (children)

A

L3

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6
Q

The spinal cord is continuous above with

A

Medulla oblongata

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7
Q

The tapered inferior end of the spinal cord forms

A

Conus Medullaris

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8
Q

non-neuronal cord that connects the conus medullaris to the coccyx

A

Filum Terminale

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9
Q

The spinal cord gives rise to

A

31 pairs of spinal nerves

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10
Q

Three connective tissue membranes surround spinal cord and brain

A

Dura mater
Arachnoid mater
Pia mater

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11
Q

anchors spinal cord to coccyx .

A

filum terminale

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12
Q

Forms the filum terminale

A

Spinal meninges

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13
Q

tough outer layer, continuous with epineurium of the spinal nerves

A

Dura mater

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14
Q

thin membrane deeper to dura mater

A

Arachnoid mater

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15
Q

delicate membrane bound tightly to surface of brain and spinal cord.

A

Pia mater

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16
Q

Which part of the spinal meninges Contains blood vessels, areolar connective tissue and fat.

A

Epidural

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17
Q

Which part of the spinal meninges is a potential cavity between the dura and arachnoid mater, contains a small volume of serous fluid.

A

Subdural

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18
Q

Which part of the spinal meninges contains CSF & blood vessels

A

Subarachnoid

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19
Q

The spinal cord enlargements are

A

Cervical enlargement
Lumbosacral enlargement

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20
Q

Which spinal cord enlargement supplies upper limbs

A

Cervical enlargement

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21
Q

Which spinal cord enlargement supplies lower limbs

A

Lumbosacral enlargement

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22
Q

The bundle of spinal nerves extending inferiorly from lumbosacral enlargement and conus medullaris surround the filum terminale and form

A

cauda equine

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23
Q

The spinal cord is divided Anteriorly by

A

Median fissure

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24
Q

The spinal cord is divided posteriorly by

A

Posterior median septum

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25
Q

The central canal is lined by

A

ependyma

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26
Q

The central canal is continuous with the

A

Ventricular system

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27
Q

The central canal superiorly opens into

A

4th ventricle

28
Q

The central canal inferiorly expands into

A

Terminal ventricle

29
Q

A transverse bridge of grey matter connecting the anterior and posterior gray horns on each side

A

Grey commissure

30
Q

Grey commissure Is pierced by the

A

Central canal

31
Q

White Commissure Lies __ to the gray commissure

32
Q

contains decussating nerve fibers

A

White Commissure

33
Q

Grey matter Consists of

A

nerve cell bodies and their processes.

34
Q

three main categories of grey matter nerve cells

A

Sensory neurons
Lower motor neurons
Interneurons

35
Q

Which neurons are located in the Dorsal horns.

A

Sensory neurons

36
Q

Which neurons are located in the ventral horns

A

Lower motor neurons

37
Q

Which neurons form spinal reflex arc

A

Interneurons

38
Q

transmit impulses to the skeletal muscles

A

Lower motor neurons

39
Q

receive impulses from the periphery of the body

A

Sensory neurons

40
Q

Nerve cell groups

A

Substantia gelatinosa
Nucleus proprius
Nucleus dorsalis
Visceral afferent nucleus

41
Q

Located at the apex of the posterior horn

A

Substantia Gelatinosa

42
Q

Extends throughout the length of spinal cord

A

Substantia Gelatinosa & Nucleus Proprius

43
Q

Located anterior to substantia gelatinosa

A

Nucleus Proprius

44
Q

Located at the base of dorsal horn

A

Nucleus Dorsalis

45
Q

Composed mostly of large neurons

A

Nucleus Dorsalis

46
Q

Nucleus Dorsalis Extends from ___ segments

A

C8 to L3-4

47
Q

Located lateral to nucleus dorsalis

A

Visceral Afferent Nucleus

48
Q

Composed mostly of medium size neurons

A

Visceral Afferent Nucleus

49
Q

Visceral Afferent Nucleus extends from ___ segments

50
Q

The ventral horns contain:

A

Motor neurons
Interneurons

51
Q

Motor neurons are organized in 3 groups

A

Medial
Central
Lateral

52
Q

Motor neurons that are present in most segments

53
Q

Smallest motor neurons

54
Q

Motor neurons that are present in cervical and lumbosacral segments

A

Lateral & medial

55
Q

Innervate muscles of Neck and Trunk

A

Medial motor neurons

56
Q

innervates muscles of the Limbs

A

Lateral motor neurons

57
Q

White matter consists of mixture of

A

Nerve fibers
Neuroglia
Blood vessels

58
Q

White color is due to

A

high proportion of myelinated nerve fibers

59
Q

First pair of spinal nerves exit vertebral column between

A

skull and atlas

60
Q

four pair of spinal nerves exit via

A

sacral foramina

61
Q

Innervates Deep muscles of the trunk responsible for movements of the vertebral column

A

Dorsal rami

62
Q

Innervates Skin near the midline of the back.

A

Dorsal rami

63
Q

In the thoracic region form Intercostal nerves that innervate the intercostal muscles and the skin over the thorax

A

Ventral rami

64
Q

The spinal nerves are connected to sympathetic chain of ganglia by

A

communicating rami

65
Q

A reflex is a response brought by a

A

Sensory stimulus

66
Q

The neural pathway mediating the reflex actions is called

A

Reflex arc

CNS Anatomy (10 decks)

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