Hand Learning Objectives

Question 1

Lunate dislocation

Answer 1

anteriorly on the dorsiflexed wrist (extended wrist) this could lead to median nerve compression and carpal tunnel
–no thumb opposition
sensory on the lateral 3 1/2 fingers

Question 2

Schapoid fracture

Answer 2

Fall when hand is abducted. avascular necrosis results (pathological death of bone resulting from inadequate blood supply)= degenerative joint disease of the wrist (radio carpal joint–scapoid, lunate, triquertrum)

Question 3

Epicondylitis

Answer 3

tennis elbow. repetitive use of superficial extensor muscles. injury of periosteum.

Question 4

Medial epicondyle apophysitis

Answer 4

inflammation of medial epicondyle by overuse of the superficial flexors

Question 5

Radial head sublaxation

Answer 5

incomplete or partial dislocation of the head of the radius (from the capitulum) tearing of the annular ligament. if this gets trapped, severe paind

Question 6

Most common elbow dislocation

Answer 6

posterior–children falling on outstretched arm.
ulnar collateral ligament often torn
fracture of head of radius, coronoid process, or olecranon– numbness of little finger and weak flexion and adduction of wrist (ulnar nerve/median nerve)

Question 7

Common direction of shoulder joint

Answer 7

downward/inferior direction, then anteriorly to the infraglenois tubercle (attachment of long head of triceps brachii)

Question 8

What prevents the shoulder from dislocating superiorly?

Answer 8

Coracoacromial arch and rotator cuff

Question 9

Shoulder seperation

Answer 9

injury of the acromioclavicular joint– acromioclavicular ligament and coraclavicular ligament

Question 10

Sensory innervation of the hand

Answer 10

Radial nerve–dorsal digital branches to the back of the hand below the distalk phalanges 1-3
ulnar- dorsal digital branches and dorsal branches of proper palmar nerves
median-proper palmar digital arches (with dorsal branches)

Question 11

Innervation of palmar side of the hand

Answer 11

median nerve lateral 2 lumbericals, thenar compartment

ulnar–everything else

Question 12

Radial artery is responsible for

Answer 12

deep palmar arch–>proper metacarpal arteries that supply the digits.
splits into princips pollicis which splits to the radialis indicis

Question 13

Superficial palmar arch

Answer 13

mainly ulnar artery. superficial palmar arch–>common palmar digital arteris–>proper palmar digital arteries.

Question 14

Hamate fracture affects what nerve and artery?

Answer 14

Ulnar nerve and artery located in Guyon Tunnel.
2 medial lumbercles (causing hyper extension, and flexion at IP joints)–resting claw hand
loss of sensation medial 1 1/2 digits