Spine Pain

Question 1

what does intermediate branch of dorsal ramus innervate

Answer 1

longissimus muscle

Question 2

what is modic type 1 characterized by

Answer 2

edema and inflammation

Question 3

what innervates the annulus fibrosus

Answer 3

posteriorly by the sinuvertebral nerve.
laterally by the ventral rami.
anterolaterally by the gray rami communicantes.

Question 4

annulus fibrosis is composed of what kind of collagen fiber?

nucleus pulposus is composed of what kind of collagen fiber?

Answer 4

annulus = type 1 collagen
nucleus = type 2 collagen

Question 5

Modic changes on MRI

Answer 5

Type 1 = bright on T2
Type 2 = bright on T2 and T1
Type 3 = dark on T2 and T1

Question 6

what is modic type 2 characterized by

Answer 6

conversion into yellow fatty marrow

Question 7

what is modic type 3 characterized by

Answer 7

bone scar tissue/sclerosis

Question 8

What is leaked when there is disk herniation

Answer 8

phospholipase, leukotrienes, thromboxanes

Question 9

divisions of dorsal ramus

Answer 9

media, lateral, intermediate

Question 10

cervical, thoracic and lumbar facet joints are innervated by

Answer 10

cervical - medial branch of corresponding dorsal ramus
Thoracic - medial branch of corresponding dorsal ramus
Lumbar - medial branches at the same level and above

Question 11

innvervation for C2-C3 facet joint

Answer 11

dorsal ramus of C3

Question 12

what is the third occipital nerve

Answer 12

the C3 dorsal ramus divides into 2 medial branches, and the larger one is known as the third occipital nerve

Question 13

what does medial branch of dorsal ramus innervate

Answer 13

facets, multifidus, interspinal ligament and muscle, periosteum of neural arch

Question 14

what innervates the L5-S1 facet joint

Answer 14

L4 medial branch and the L5 dorsal ramus (no medial branch exists at this level)

Question 15

what does lateral branch of dorsal ramus innervate

Answer 15

paraspinal muscles, skin, and SI joint