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Anatomy > Ch. 9 Spinal Cord & Meninges > Flashcards

Ch. 9 Spinal Cord & Meninges Flashcards

1
Q

An area of cell bodies within the CNS containing enlargements known as the dorsal horns and ventral horns

A

Gray matter of the spinal cord.

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2
Q

An area of fibers (mainly axons) within the CNS, divided into posterior, lateral and anterior funiculi

A

White matter of the spinal cord

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3
Q

Columns of nerve bundles containing tracts that course up and down, to and from the brain. Includes tracts like the corticospinal tract for voluntary movement.

A

Funiculi

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4
Q

Which funicular tract is use for voluntary movement?

A

corticospinal tract

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5
Q

Arises from the dorsal surface of the spinal cord. Contains only sensory neurons.

A

Dorsal root

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6
Q

An enlarged portion of the dorsal root. Contains cell bodies of sensory neurons

A

Dorsal root ganglion

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7
Q

An area of cell bodies outside of the CNS

A

Ganglion

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8
Q

Arises from the ventral surface of the spinal cord. Contains axons of motor neurons only

A

Ventral root

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9
Q

Ventral root joins with dorsal root to form this. Divides ventral and dorsal rami

A

Spinal nerve

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10
Q

The larger ramus supplying the entire anterior trunk, as well as appendages. Contains both sensory and motor neurons.

A

Ventral ramus

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11
Q

Which parts of the body are supplied by the ventral ramus

A

Anterior trunk and appendages.

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12
Q

The smaller ramus supplying structures of the back. Contains both sensory and motor neurons

A

Dorsal ramus

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13
Q

Which parts of the body are supplied by the dorsal ramus?

A

Back

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14
Q

The cell body is in the dorsal root ganglion.

A

Sensory neuron

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15
Q

Another name for sensory neuron

A

Affarent neuron (SAME)

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16
Q

Majority of neurons in the body are …

A

Interneurons

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17
Q

The cell body is in the gray matter of the spinal cord, its axon passing through the white matter into the ventral root.

A

Motor neuron

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18
Q

Another name for motor neuron

A

Efferent neuron (SAME)

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19
Q

Long cylindrical mass of nervous tissue that occupies the upper two thirds of the vertebral canal.

A

Spinal cord

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20
Q

Extension of the spinal cord

A

Connected to brain superiorly, where it is continuous with the medulla oblongata. Extends inferiorly to LV2

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21
Q

Lower end of spinal cord, conus shape

A

Conus medullaris

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22
Q

Spinal cord enlargements are located in the ___ and ___ regions, where the cell bodies of the neurons for upper limb and lower limb

A

Cervical and lumbar

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23
Q

Enlargement located from C5 to T1 spinal segments

A

cervical enlargement

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24
Q

Enlargement located from L1 to S3 of spinal segments

A

Lumbosacral enlargement

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25
Q

Cauda equine starts below the vertebral level of __

A

LV2

26
Q

Cauda equina is composed of

A
  1. long roots of the lower spinal nerves

2. filum terminale

27
Q

Why is the level of attachment of the spinal root to the cord higher than the level of emergence of the spinal nerve?

A

Difference in length between spinal cord and vertebral canal

28
Q

of pairs of spinal nerves

A

31

29
Q

The first pair of spinal nerves (C1) emerges between the __ and the __

A

atlas and the skull

30
Q

The C2 to the C7 nerves emerge ___ the correspondingly numbered vertebrae

A

above

31
Q

C8 spinal nerve pair emerges ____ C7

A

Below

32
Q

Spinal nerves T1-Cx1 emerge ___ the correspondingly numbered vertebrae

A

Below

33
Q

of spinal n. pairs in the cervical region

A

8 (c1-c8)

34
Q

of spinal n pairs in the thoracic region

A

12 (t1-t12)

35
Q

of spinal n pairs in the lumbar region

A

5 (l1-l5)

36
Q

of spinal n pairs in the sacral region

A

5 (s1-s5)

37
Q

of spinal nerve pairs in the coccygeal region

A

1 (cx1)

38
Q

Arteries supplying the spinal cord

A

1 anterior spinal artery and

2 posterior spinal arteries

39
Q

Connective tussles surrounding and protecting the spinal cord and brain

A

Meninges

40
Q

From external to internal, the meninges consist of ___

A

Dura mater
Arachnoid mater
Pia mater

41
Q

Outermost meninx. Comprised of dense, tough, fibrous connective tissue

A

Dura mater

42
Q

Extension of the dura of the spinal cord

A

From the foramen magnum, where it is continuous with the dura of the brain, down to the dural sac at SV2 and further to its inferior attachment to the coccyx called the filum of the dura

43
Q

Inferior attachment of the dura to the coccyx

A

Filum of the dura

44
Q

Space external to the spinal dura mater

A

epidural space

45
Q

Epidural space contains: (maize and blue!)

A

Adipose tissue in the form of globules of fat

Vertebral venous plexus

46
Q

Clinical reference for the vertebral venous plexus

A

Batson’s veins

47
Q

Connects superiorly with the dural sinuses of the cranial cavity

A

vertebral venus plexus

Batson’s veins

48
Q

Batson’s veins communicate with veins external to the vertebrae via ___

A

intervertebral veins.

49
Q

What happens if an intervertebral vein becomes dislocated?

A

Because of proximity, it can compress a spinal nerve,

50
Q

Intermediate meninx

A

Arachnoid mater

51
Q

Delicate, loose, netlike membrane

A

Arachnoid mater

52
Q

Extension of the arachnoid mater

A

Surrounds the brain, extends through the foramen magnum through the vertebral column to S2.

53
Q

Separates the arachnoid mater from the Pia mater, containing CSF

A

subarachnoid space

54
Q

Innermost layer of the meninges

A

pia mater

55
Q

delicate connective tissue that adheres to the surface of the brain and spinal cord

A

pia mater

56
Q

Extension of the Pia mater

A

from the foramen magnum, where it is continuous with the cerebral Pia mater inferiorly through the vertebral column to the end of the spinal cord, the conus medullaris, and further as an inferior extension.

57
Q

Extension of the Pia mater - forms a series of toothlike lateral extensions of the Pia from the lateral surface of the spinal cord.

A

Denticulate ligament.

58
Q

Where do the denticulate ligaments attach?

A

Intervals along the internal surface of dura and arachnoid of the cord.

59
Q

Separates the ventral roots of the spinal nerves from dorsal roots

A

denticulate ligament

60
Q

Single inferior extension of Pia mater is, found from the conus medullaris inferiorly through the vertebral embedded within the roots of the caudal equina.

A

filum terminale

61
Q

Attaches inferiorly at the coccy

A

filum terminale

Anatomy (17 decks)

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