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SP Anatomy exam 1 > Spinal Cord > Flashcards

Spinal Cord Flashcards

1
Q

Cervical Level

A

7 Vertebrae

8 spinal nerves

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2
Q

Thoracic Level

A

Twelve vertebrae and spinal nerves

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3
Q

Lumbar Level

A

Five vertebrae and spinal nerves

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4
Q

Sacral and Coccygeal levels

A

Five spinal nerves each

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5
Q

The ________ vertebrae are the most fragile

A

Cervical

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6
Q

Vertebral levels of greatest mobility

A

C1 - 2
C5 - 6
T12 - L1

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7
Q

Epidural space contains:

A

Venous plexus

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8
Q

Dura Mater

A

the outermost covering of spinal cord

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9
Q

forms a layer under the dura and extends

trabeculae to the pia mater

A

Arachnoid

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10
Q

intimate with the cord

Forms the denticulate ligaments

A

Pia Mater

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11
Q

This fills the subarachnoid space

A

Cerebrospinal Fluid

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12
Q

Anchoring cord of denticulate ligaments

A

Denticulate ligaments extend from the cord through the arachnoid to the dura
Spinal nerves also anchor the cord in the vertebral canal

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13
Q

the caudal cone-shaped end of the

spinal cord. It extends to the L1 - L2 interspace

A

Conus Medullaris

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14
Q

consists of the pia and arachnoid that

extend from the conus medullaris to the coccyx (tail bone)

A

Filum Terminale

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15
Q

consists of posterior and

anterior roots and occupies the lumbar cistern

A

The Cauda Equina (horse’s tail)

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16
Q

Posterior Root

A

carries sensory signals toward the
cord. A posterior root ganglion is found along the
posterior root. It contains the neuron cell bodies of
the nerve fibers that make up the posterior root.

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17
Q

carries motor signals away from

the cord

A

Anterior Root

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18
Q

_________ ________ of the spinal nerve serves the posterior aspect of the body and contains both posterior and anterior root fibers

A

Posterior Ramus

19
Q

__________ ________ of the spinal nerve serves the anterior aspect of the body and contains both posterior and anterior root fibers

A

Anterior Ramus

20
Q

contain autonomic fibers and branch off the spinal nerve at levels T1-L2

A

Gray and White communicating rami

21
Q

Internally the cord consists of:

A

Gray matter which is made up of neuron cell bodies

White matter which is made up of myelinated axons

22
Q

Externally the cord is subdivided into regions by:

A

longitudinal grooves called sulci or fissures. A

fissure is a deep sulcus

23
Q

Early in development the cord extended __________________________________. At that time spinal nerves grew out between vertebrae to connect the cord with ____________ ___________.

A

the entire length of the vertebral canal; peripheral structures

24
Q

Later in development the cord stopped growing but ___________________________________. As a result the cord was drawn cranially within the
vertebral canal but the nerves persisted in exiting the canal through_________________.

A

the vertebral column continued to grow larger; the original foramina

25
Q

The caudal end of the cord in the adult corresponds with

A

the L1 - L2 interspace of the vertebral column

26
Q

Gray matter consists of

A

Nerve cell bodies and dendrites

27
Q

T or F: There is myelin in gray matter

A

False

28
Q

Lipophilic stains are attracted to lipid and stain the myelin dark. As a result, in stained tissue the:

A

White matter is dark, Gray matter is light

29
Q

consists of the fibers that make
up the white matter that lies between the two
posterolateral sulci

A

Posterior Funiculus

30
Q

consists of the fibers that make up the
white matter that lies between the posterolateral
sulcus and the anterolateral sulcus.

A

Lateral Funiculus

31
Q

consists of the fibers that make
up the white matter that lies between the two
anterolateral sulci

A

Anterior Funiculus

32
Q

receives incoming sensory messages

A

Posterior Horn

33
Q

consists of motor neurons of the

autonomic nervous system

A

Lateral Horn

34
Q

consists of motor neurons of the

somatic nervous system

A

Anterior Horn

35
Q

consists of sensory fibers from the upper extremities which begin to enter at level
T-6. This cross-section must be above T-6.

A

Fasciculus Cuneatus

36
Q

The lateral horn is seen only between

A

Levels T1-L2

37
Q

Lamina I

A

relays sensory signals

38
Q

Lamina II

A

Substantia Gelatinosa (important in pain)

39
Q

Lamina V

A

relays sensory signals

40
Q

Annulus fibrosus

A

Fibers weaken and rupture

41
Q

Nucleus pulposus

A

remnant of the notochord

42
Q

The nucleus herniates through the break in the annulus fibrosus and

A

puts pressure on nearby nerves

43
Q

Cervical Spondylosis

A 
Bony ridges (osteophytes) on the vertebral bodies
cause a narrowing of the intervertebral foramina

SP Anatomy exam 1 (8 decks)

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