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Spinal Exam 3 > Arthrology/Innervation of the Vertebral Column > Flashcards

Arthrology/Innervation of the Vertebral Column Flashcards

1
Q

What is the maximum number of common ligaments identified with a vertebral couple?

A

Eight

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2
Q

What is the reason that nine common ligaments are identified but only eight will be attached at any specific vertebral couple?

A

The ligamentum nuchae and supraspinous ligaments attach to the spinous tubercles, but only one of these will be identified at a single vertebral couple

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3
Q

What is the number of true intervertebral discs identified in the adult?

A

23

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4
Q

What is the percent of intervertebral disc height contribution to the length of each region of the vertebral column?

A

Cervical: 22-25%
Thoracic: 20%
Lumbar: 33%

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5
Q

What is the cervical nucleus pulposus composed of?

A

Fibrocartilage

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6
Q

What is the water concentration in the lumbar nucleus pulposus at birth and after thirty?

A

Birth: 88%
Thirty: 70%

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7
Q

What is the organizational pattern for glycosaminoglycans in the lumbar nucleus pulposus?

A

They typical lack a binding site for hyaluronic acid and are thus non-aggregated

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8
Q

What cell is associated with the nucleus pulposus until about age eleven?

A

Notocord cells

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9
Q

Which type of collagen is dominant in the nucleus pulposus?

A

Collagen type II

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10
Q

What is unusual about the cervical annulus fibrosus?

A

It lacks any lamellar or layered organization

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11
Q

What is the appearance of the cervical annulus fibrosus?

A

A horse-shoe with an anterior margin thick and a lateral margins tapering to the uncinate processes; the posterior margin is thin

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12
Q

What compensates for the thinness of the posterior part of the cervical annulus fibrosus?

A

Posterior longitudinal ligament

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13
Q

What is the organization of the lumbar annulus fibrosus?

A

It has 12-14 concentric cylindrical lamellae

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14
Q

Why is the posterior part of the lumbar annulus fibrosus more susceptible to rupture, herniation, prolapse, or protrusion?

A

The posterior margin of each lamellus is thin and the posterior longitudinal ligament is also less developed

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15
Q

What is the water concentration in the lumbar annulus fibrosus at birth and after thirty?

A

Birth: 78%
Thirty: 70%

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16
Q

What is the organizational pattern for glycosaminoglycans int he lumbar annulus fibrosus?

A

They typically have a binding site for hyaluronic acid and are thus aggregated

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17
Q

What is the consequence of aggregated glycosaminoglycans in the lumbar annulus fibrosus?

A

The annulus fibrosus will retain water under deformation conditions

18
Q

Which type of collagen is dominant in the annulus fibrous?

A

Collagen type I

19
Q

What is the organizational pattern for collagen fibers in the annulus fibrosus?

A

They are parallel with one another in a single lamellus and angled

20
Q

What is the organization of collagen fibers between lamellae?

A

Collagen fibers will be angled in the opposite direction such that a spiral-counterspiral organization is obsevred

21
Q

What is the average angle of collagen fibers within the annulus fibrosus?

A

They average 50 to 60 degrees

22
Q

What is the origin for the cells of the annulus fibrosus?

A

Sclerotomites

23
Q

What cell type is associated with annulus fibrosus?

A

Fibroblast and fibrocyte

24
Q

What is the cartilage end plate derived from?

A

The epiphyseal plate

25
Q

What part of the vertebral body will the cartilage end plate cover?

A

The cancellous bone at the top or bottom of the vertebral body

26
Q

What is the principal type of collagen fiver within the cartilage end plate?

A

Type II collagen fiber

27
Q

What is the direction of collagen fibers within the cartilage end plate?

A

Collagen fibers are aligned anterior to posterior

28
Q

What is the earliest indicator of intervertebral disc pathology or degeneration?

A

Changes in the histology of the cartilage end plate

29
Q

What part of the intervertebral disc is innervated?

A

The outer lamellae of the annulus fibrosus

30
Q

What part of the cervical intervertebral disc is highly innervated?

A

The middle third of the annulus fibrosus

31
Q

What are the types of receptor endings in the intervertebral disc?

A

Nociceptors and proprioceptors

32
Q

What is the relationship between size of the intervertebral disc and receptor endings?

A

The larger the disc, the greater the variety of receptor endings

33
Q

What is the proposed function of receptor ending density in the anterior part of the intervertebral disc?

A

They provide feedback during extension

34
Q

What are the sources of innervation of the intervertebral disc?

A

The sinu-vertebral nerve (sinus vertebral nerve, recurrent meningeal nerve)
Fibers from the ventral primary ramus
Fibers from the white ramus communicans
Fibers from the paradisiacal ramus communicans
Fibers from the gray ramus communicans

35
Q

What nerve(s) have been shown to give off the sinus vertebral/sinu-vertebral/recurrent meningeal nerve?

A 
The mixed spinal nerve
Ventral primary ramus
Dorsal primary ramus 
Gray ramus communicans
White ramus communicans
36
Q

The recurrent meningeal/sinu-vertebral/sinus vertebral nerve has typically been shown to originate from which source?

A

The gray ramus communicans

37
Q

What part of the intervertebral disc is innervated by the recurrent meningeal/sinu-vertebral/sinus vertebral nerve?

A

The outer lamellae of the annulus fibrosus at the posterior part of the intervertebral disc

38
Q

What forms the anterior neural plexus of the vertebral column?

A

Fibers from the ventral primary ramus

39
Q

What part of the intervertebral disc is innervated by fibers from the ventral primary ramus?

A

The outer lamellae of the the annulus fibrosus at the anterior and lateral part of the intervertebral disc

40
Q

What innervated the annulus fibrosus at the lateral part of the intervertebral disc?

A

Fibers from the ventral primary ramus
Fibers from the paradisiacal ramus communicans
Fibers from the gray ramus communicans

41
Q

What part of the intervertebral disc is innervated by fibers from the white ramus communicans?

A

The outer lamellae of the annulus fibrosus at the lateral part of the intervertebral disc

42
Q

What is the name given to the white ramus which becomes embedded within the annulus fibrosus of the intervertebral disc?

A

The paradisiacal ramus comminicans

Spinal Exam 3 (19 decks)

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