Neuro 8 Nerve Roots

Front 1

which nerve root is affected in a far lateral L4-L5 disc herniation?

Back 1

L4; far lateral disc herniation will reach the nerve root exiting at that level, resulting in impingement of the next higher nerve root

Front 2

what kind of herniation can cause cauda equina syndrome?

Back 2

central lumbosacral disc herniation

Front 3

where does the lumbar cord end?

Back 3

T12-L1 (although the lumbar nerve roots exit below their corresponding vertebrae)

Front 4

what muscles does the radial nerve innervate?

Back 4

triceps, brachioradialis, extensor carpi radialis

Front 5

triceps nerve root

Back 5

C7 (C6,C7,C8)

Front 6

brachioradialis

Back 6

C6 (C5,C6)

Front 7

extensor carpi radialis

Back 7

C6 (C5,C6)

Front 8

what muscles does the median nerve innervate?

Back 8

pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum superficialis, LOAF muscles

Front 9

which muscles are affected in carpal tunnel? what nerve and nerve root supply these muscles?

Back 9

Lumbricals (I, II), opponens pollicus, abductor pollicus brevis, flexor pollicis brevis; median nerve; T1

Front 10

radiculopathy

Back 10

neuropathy affecting spinal nerve roots

Front 11

what is the presentation of Guillain-Barre syndrome?

Back 11

progressive weakness, areflexia, and tingling paresthesias of the hands and feet; typically occurs 1-2 weeks following a viral illness

Front 12

what is pyridostigmine?

Back 12

long-acting cholinesterase inhibitor

Front 13

spondylosis

Back 13

degenerative disorder of the spine

Front 14

spondylolysis

Back 14

fracture in the interarticular portion of the vertebral bone, b/w the facet joints

Front 15

spondylolisthesis

Back 15

displacement of a vertebral body relative to the vertebral body beneath it

Front 16

saddle anesthesia

Back 16

sensory loss in the S2-S5 distribution

Front 17

where do nerve roots exit?

Back 17

below the corresponding vertebrae except for the cervical nerve roots which exit above the corresponding vertebrae

Front 18

sensory innervation of the head

Back 18

C2 (face is trigeminal)

Front 19

dermatome of the shoulder

Back 19

C5

Front 20

dermatome of the lateral arm and first 2 digits

Back 20

C6

Front 21

dermatome of the middle digit

Back 21

C7

Front 22

dermatome of the 4th and 5th digits

Back 22

C8

Front 23

dermatome of the anteromedial shin

Back 23

L4

Front 24

dermatome of the anterolateral shin and dorsum of the foot to the big toe

Back 24

L5

Front 25

dermatome of the small toe, lateral foot, sole, and calf

Back 25

S1

Front 26

myotome

Back 26

muscles innervated by a single nerve root

Front 27

which nerve and nerve roots innervate the rhomboids?

Back 27

dorsal scapular, C5 (C4-C6)

Front 28

which nerve and nerve roots innervate pectoralis minor?

Back 28

medial pectoral, C6-C8

Front 29

which nerve and nerve roots innervate latissimus dorsi?

Back 29

thoracodorsal C7 (C6-C8)

Front 30

what are the muscles of the hypothenar eminance? which nerve and nerve roots innervate these muscles?

Back 30

opponens digiti minimi, abductor digiti minimi, flexor digiti minimi; ulnar, T1 (C8,T1)

Front 31

what radiculopathy can cause Horner's syndrome?

Back 31

T1 radiculopathy can interrupt the sympathetic pathway to the cervical sympathetic ganglia, resulting in Horner's

Front 32

what's occurs in a disc herniation?

Back 32

part or all of the nucleus pulposis extrudes through a tear in the annulus fibrosus, often causing root compression

Front 33

what are the most common radiculopathies caused by disc herniation?

Back 33

C6, C7, L5, S1; lumbosacral are 2-3 times more common that cervical radiculopathies

Front 34

arm abduction at the shoulder

Back 34

C5

Front 35

flexion at the elbow

Back 35

C5-C6

Front 36

wrist flexion

Back 36

C6

Front 37

elbow extension

Back 37

C7

Front 38

dorsiflexion

Back 38

L5

Front 39

plantar flexion

Back 39

S1