Chapter 7 Elbow, Wrist, Hand Flashcards
Only muscle of thenar eminence NOT innervated by median n?
Adductor pollicis brevis (ulnar n)
Innervation of lumbricals?
1st-2nd innervated by median n; 3rd-4th innervated by ulnar n
What attaches to the DIPs?
Flexor digitorum profundus
What attaches to PIPs?
Flexor digitorum superficialis
Carrying angle?
Intersection of 1) longitudinal axis of humerus and 2) line from distal radial-ulnar joint passing thru proximal radial-ulnar joint
CA for men?
5 degrees
CA for women?
10-12 degrees
CA >15 degrees?
Cubitus valgus OR abducation of ulna in SD
CA
Cubitus varus OR adduction of ulna in SD
An increase in CA causes what wrist motion?
Adduction of wrist
A decreased in CA causes what wrist motion?
Abduction of wrist
What motions occur with adduction of ulna?
Lateral glide of olecranon, radius is pulled proximally resulting in abduction of wrist
What motions occur with abduction of ulna?
Medial glide of olecranon, radius is pushed distally resulting in adduction of wrist
Radial head motion?
Anterior with supination; posterior with pronation
Location of reference when naming ulna motion?
Distal ulna
Common cause of posterior radial head?
Falling on pronated forearm
Common cause of anterior radial head?
Falling backward on supinated forearm
Gold standard dx for carpul tunnel?
EMG
Swan neck deformity?
Flexion contracture of MCP and DIP, extension contracture of PIP
Boutonniere deformity?
Extension contracture of MCP and DIP, flexion contracture of PIP
Cause of swan neck?
Contracture of intrinsic mm of hand
Cause of boutonniere?
Rupture of hood o extensor tendon at PIP
