MSK Anatomy

Question 1

Deltoid muscle function

Answer 1

Abduction of the arm

Question 2

Teres minor function and nerve supply

Answer 2

Lateral rotation of the arm, axillary

Question 3

which nerve innervates triceps brachii and Courses round the _____ groove of the humerus.

Answer 3

radial

Question 4

Where does the Median nerve run in relation to the intermediate and deep later of the anterior compartment

Answer 4

Runs BETWEEN the intermediate and deep layer of the anterior compartment.

Question 5

median nerve supplies…

Answer 5

ALL muscles of forearm EXCEPT flexor carpi ulnaris, ulnar half of flexor digitorum profundus (which are supplied by the ulnar nerve). Muscles in the hand: first 2 lumbricals, opponens pollicis, abductor pollicis brevis, flexor pollicis brevis

Question 6

Anterior interosseous nerve innervates…

Answer 6

muscles of the deep layer. Flexor digitorum profundus, lateral half, flexor pollicis longus, pronator quadratus

Question 7

Flexor digitorum superficialis (FDS) - insertion, function and innervation

Answer 7

Digits 2-5, inserts on intermediate phalanx, flexes PIP joint, innervated by median nerve

Question 8

Flexor digitorum profundus - innervation, insertion, function

Answer 8

Digits 2-5. Medial half (ulnar nerve), lateral half (anterior interosseous nerve). Inserts on distal phalanx. Flexes DIP joint

Question 9

Flexor pollicis longus (FPL) - insertion, function, innervation

Answer 9

Inserts on distal phalanx of thumb. Flexes thumb. innervated by anterior interosseous nerve

Question 10

Thenar eminence muscles and innervation

Answer 10

• Abductor pollicis brevis
• Flexor pollicis brevis
• Opponens pollicis
  Innervated by the recurrent branch of the median nerve

Question 11

The carpal tunnel is formed by:

Answer 11

• flexor retinaculum
• carpal bones (trapezium, scaphoid, pisiform, hook of hamate)

Question 12

Carpal tunnel contents:

Answer 12

• flexor digitorum superficialis (x4)
• flexor digitorum profundus (x4)
• flexor pollicis longus (x1)
• median nerve

Question 13

Carpal tunnel syndrome

Answer 13

• compression of median nerve
• weakness in the thenar muscles
• numbness in lateral 3 and a half fingers

Question 14

Ulnar nerve route/course

Answer 14

Medial in the arm with the median nerve before coursing posteriorly.
In the forearm it gives branches to flexor carpi ulnaris and flexor digitorum profundus (medial half).
Runs posteriorly between medial epicondyle and olecranon process - cubital tunnel.
Ulnar nerve passes into the hand with the ulnar artery and vein.

Question 15

Ulnar nerve supplies…

Answer 15

In the arm: flexor carpi ulnaris, ulnar half of flexor digitorum profundus.
In the hand: supplies ALL instrinsic EXCEPT “LOAF”. so adductor pollicis, ms of hypothenar eminence, medial 2 lumbricals, palmar and dorsal interossei