LG 3.11 Anatomy of the hand

Question 1

which hand bone is fractured most often?

Answer 1

scaphoid

Question 2

axis for hand Abduction and Adduction occurs through which digit?

Answer 2

3rd

Question 3

damage to ulnar nerve could result in:

Answer 3

1. loss of sensation of medial side of hand including with all of the 5th and the medial 1/2 of the 4th digit
2. all hand movement affected that are not innervated by medial nerve

Question 4

damage to medial nerve could result in:

Answer 4

1. loss of sensation to palmar aspect of lateral hand including palmer aspect of all of digits 1-3 and lateral 1/2 of 4th digit. (also innervates dorsal finger tips of digits 1, 2 and 3 and the lateral 1/2 of the fingertip of the 4th digit) … picture is worth a thousand words!
2. motor: a) unable to move the thumb (abductor pollicis brevis m, flexor pollicis brevis m, opponens pollicis m and b) can’t flex MCP joints nor extend IP joints of digits 4,5 (lateral 2 lumbricals)

Question 5

damage to radial nerve could result in:

Answer 5

1. loss of sensation to lateral dorsum of hand including dorsum of digits 1-3 and the lateral 1/2 of the 4th digit. No fingertip innervation
2. No motor innervation