hand/wrist LOs Flashcards
1
Q
abductor digiti minimi
A
- BL: pisiform > ulnar side of base of proximal phalanx of 5th digit
- action: abducts 5th digit
- innervation: deep branch of ulnar nerve
- SC: C8-T1
2
Q
abductor pollicis brevis
A
- BL: transverse carpal ligament > radial side of base of proximal phalanx of thumb
- action: abducts thumb
- innervation: recurrent branch of median nerve
- SC: C6-T1
3
Q
adducutor pollicis
A
- BL: capitate, 2nd and 3rd metacarpals (oblique head), palmar aspect of 3rd metacarpal (transverse head) > base of proximal phalanx of thumb
- action: adducts thumb
- innervation: deep branch of ulnar nerve
- SC: C8-T1
4
Q
dorsal interossei
A
- BL: adjacent sides of metacarpals > proximal phalangeal bases, dorsal digital expansions of digits 2-4
- actions: abduct MCP, flex MCP, extends IP (digits 2-4)
- innervation: deep branch of ulnar nerve
- SC: C8-T1
5
Q
flexor digiti minimi brevis
A
- BL: hamate > ulnar side of base of proximal phalanx of 5th digit
- action: flexes MCP of 5th digit
- innervation: deep branch of ulnar nerve
- SC: C8-T1
6
Q
flexor pollicis brevis
A
- BL: transverse carpal ligament, trapezium > radial side of base of proximal phalanx of thumb (deep bead blends with opponens pollicis)
- action: flexes MCP of thumb
- innervation: recurrent branch of median nerve (superficial head), deep branch of ulnar nerve (deep head)
- SC: C6-T1 (superficial head), C8-T1 (deep head)
7
Q
lumbricals
A
- BL: tendons of flexor digitorum > radial side of dorsal digital expansions of digits 2-5
- action: flexes MCP 2-5, extends IP 2-5
- innervation: median nerve (1, 2), deep branch of ulnar nerve (3, 4)
- SC: C7-T1 (1, 2), C8-T1 (3,4)
8
Q
opponens digiti minimi
A
- BL: hook of hamate > ulnar margin of shaft 5th metacarpal
- action: opposition of 5th digit to thumb
- innervation: deep branch of ulnar nerve
- SC: C8-T1
9
Q
opponens pollicis
A
- BL: transverse carpal ligament, trapezium > palmar surface of first metacarpal
- action: opposition of thumb to fifth digit
- innervation: recurrent branch of median nerve
- SC: C6-T1
10
Q
palmar interossei
A
- BL: palmar aspects of metacarpals 2, 4, 5 > dorsal digital expansions of digits 2, 4, 5
- action: adducts MCP, flex MCP, extend IP (2, 4, 5)
- innervation: deep branch of ulnar nerve
- SC: C8-T1
11
Q
distal radio-ulnar joint
A
pivot/trochoid
12
Q
radiocarpal joint
A
ellipsoidal/condyloid
13
Q
thumb carpometacarpal joint
A
sellar/saddle
14
Q
digits 2-5 carpometacarpal joint
A
plane/gliding
15
Q
metacarpophalangeal joint
A
ellipsoidal/condyloid
16
Q
interphalangeal joint
A
ginglymus/hinge