Muskuloskeletal + Derm

Question 1

Where to inject a pudendal nerve block (to relieve pain in delivery)

Answer 1

Ischial spine

Question 2

Most common rotator cuff inury

Answer 2

Supraspinatus

Question 3

Rotator cuff injury in pitchers

Answer 3

Infraspinatus

Question 4

Female runner, bilateral pes planus, will show up on bone scans

Answer 4

Tibial stress fracture; due to overuse and improper musculoskeletal conditioning

Question 5

Autoantibodies to hemidesmosomes cause what

Answer 5

Bullous pepmphigoid (hemidesmosomes connect basal cells to basement membrane; hemidesomosomes are down “bull”ow)

Question 6

Autoantibodies to desmosomes cause what

Answer 6

Pemphigus vulgaris

Question 7

Fractures of surgical neck of the humerus, dislocation of the humerus, and intramuscular injections around neck of humerus may damage what nerve?

Answer 7

Axillary

Question 8

Subluxation of the radius may effect what nerve

Answer 8

Radial (deep branch)

Question 9

Dislocation of the lunate may effect what nerve

Answer 9

Median

Question 10

Supracondylar fracture of humerus and pronator teres syndrome may effect what nerve

Answer 10

Median nerve

Question 11

Hook of hamate (Guyon’s canal) may effect what nerve

Answer 11

Ulnar

Question 12

Damage to upper trunk of brachial plexus may cause what lesion; levels involved

Answer 12

“Waiter’s tip”, Erb-Duchenne’s palsy (arm is adducted, internally rotated (pronated), wrist is flexed); levels C5-6 are involved

Question 13

Damage to lower trunk of brachial plexus may cause what lesion; what levels are involved

Answer 13

Klumpke’s palsy, “claw hand”; levels C8-T1 (lose innervation to intrinsic muscles of the hand)

Question 14

Damage to posterior cord may cause what; branches involved

Answer 14

Wrist drop and deltoid paralysis; radial and axillary nerves respectively

Question 15

Damage to long thoracic nerve causes what

Answer 15

Winging of the scapula (serratus anterior denervated)

Question 16

Levels in the median and radial nerve

Answer 16

C5-T1

Question 17

Muscles innervated by radial nerve

Answer 17

Brachoradialis, Extensors of wrist and fingers, Supinator, Triceps (the BEST muscles)

Question 18

Median nerve controls flexion of what fingers

Answer 18

Lateral fingers

Question 19

Ulnar nerve controls flexion of what fingers

Answer 19

Medial fingers

Question 20

Muscle groups damaged in Erb-Duchenne’s (upper trunk) lesion

Answer 20

Abductors, external (lateral) rotators, biceps (pronator)

Question 21

Major pronator of the arm

Answer 21

BICEPS femoris (NOT a named “pronator muscle”)

Question 22

“Clawing” of fingers is due to what (general)

Answer 22

Loss of lumbricals

Question 23

Clawing of 4th and 5th digit when trying to open hand

Answer 23

Loss of ulnar nerve

Question 24

Clawing of digits 2 and 3 upon extension of fingers

Answer 24

Median nerve damage in carpal tunnel or dislocated lunate

Question 25

When pt tries to make a fist, 2nd and 3rd digits remain extended and thumb won’t oppose

Answer 25

Damage of median nerve PROXIMAL to carpal tunnel (i.e. before it goes under transverse carpal ligament)

Question 26

Mastectomy may cause what musculoskeletal sign

Answer 26

Winging of scapula; damage to long thoracic nerve and loss of innervation to serratus anterior

Question 27

Muscles of hand controlled by median nerve

Answer 27

OAF; opponens pollicis, abductor pollicis brevis, flexor pollicis brevis

Question 28

Muscles controlled by ulnar nerve (in the hand)

Answer 28

OAF (again); opponens digiti mini, abductor digiti mini, flexor digiti mini

Question 29

Actions of lumbricals

Answer 29

Flex at MCP joint, extend at DIP and PIP

Question 30

Dorsal interrosseous muscles do what

Answer 30

ABduct (DAB) the fingers

Question 31

Palmar interrosseous msucles do what

Answer 31

ADduct (PAD) the fingers

Question 32

Tendons involved in De Quervain’s tenosynovitis

Answer 32

Abductor pollicis longus and extensor pollicis brevis