Amp 2 study elbow

Question 1

Contents cubital fossa

Answer 1

Median nerve
Brachial artery
Tendon of bicep brachii
Radial nerve

Question 2

Motor supply of median nerve

Answer 2

Supplies all flexor muscles EXCEPT those supplied by ulna nerve

Question 3

Motor supply of ulna nerve

Answer 3

Supplies flexor carpi ulnaris and ulnar head of flexor digitroum profundus

Question 4

Motor supply of radial nerve

Answer 4

Supplies all the muscles back of arm, all wrist extensors and brachioradialis + supinator

Question 5

Explain active insuffiency and example at wrist

Answer 5

When a muscle cannot contract fully across all the joints = produces less force

Example
Flexor digitorum profundus - Hard to make fist as wrist is flexed as muscle is already shortened

Question 6

Explain Passive Insuffiency and give example at wrist

Answer 6

When a muscle is stretched over multiple joints + limits movement because can’t stretch further

Example at wrist: Extensor digitorum - hard to fully extend fingers when wrist is flexed as muscle is too stretched