11-9-11 Wednesday

oh my god did we do anything other than anatomy today?!

Anatomy

Flexor Carpi Radialis
O: common flexor tendon from medial epicondyle of humerus
I: bases of 2nd and 3rd metacarpals
A: flex wrist (radiocarpal)
abduct radiocarpal
may assist flex elbow (humeroulnar

Palmaris Longus
O: common flexor tendon from medial epicondyle of humerus
I: flexor retinaculum and palmar aponeurosis
A: tense the palmar fascia
flex radiocarpal
may assist to flex humeroulnar jt

Flexor Carpi Ulnaris
O: humeral head- common flexor tendon from medial epicondyle of humerus
Ulnar head- posterior surface of proximal 2/3 of ulna
I: pisiform, hook of the hamate, and base of 5th metacarpal
A: flex radiocarpal
adduct radiocarpal
assist flex humeroulnar

Flexor Digitorum Superficialis
O: common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna, interosseous membrane and proximal shaft of radius
I: sides of middle phalanges of 2-5 finger
A: flex 2-5
flex radiocarpal

Flexor Digitorum Profundus
O: anterior and medial surfaces of proximal 3/4 of ulna
I: bases of distal phalanges, palmar surface of 2-5 fingers
A: flex 2-5 fingers
assist flex of radiocarpal

Pronator Teres
O: common flexor tendon from medial epicondyle of humerus and coronoid process of the ulna
I: middle of lateral surface of radius
A: pronate forearm (radioulna jt)
assist to flex the humeroulna

Pronator Quadratus
O: medial, anterior surface of distal ulna
I: lateral, anterior surface of distal radius
A: pronate the radioulna jt

Supinator
O: lateral epicondyle of humerus, radial collateral ligament, annular ligament and supinator crest of the ulna
I: anterior, lateral surface of proximal 1/3 of radial shaft
A: supinate the radioulna jt

Long mm of thumb (4)

Abductor Pollicis Longus
O: posterior surface of radius and ulna, and interosseous membrane
I: base of first metacarpal
A: abduct thumb
extend thumb
abduct radiocarpal

Extensor Pollicis Longus
O: posterior surface of ulna and interosseous membrane
I: lbase of distal phalanx of thumb
A: extend thumb
extend thumb
abduct r/c

Extensor Pollicis Brevis
O: posterior surface of radius and interosseous membrane
I: base of proximal phalaanx of thumb
A: extend thumb
extend thumb
abduct r/c

Flexor Pollicis Longus
O: anterior surface of radius and interosseous membrane
I: base of distal phalanx of thumb
A: flex thumb
flex thumb
assist flex r/c


Short mm of thumb (4)

Abductor Pollicis Brevis
O: flexor retinaculum, trapezium, and scaphoid tubercles
I: base of proximal phalanx of thumb
A: abduct thumb
assist in opposition of thumb

Flexor Pollicis Brevis
O: superficial head- flexor retinaculum
deep head- trapezium, trapezoid, and capitate
I: base of proximal phalanx of thumb
A: flex thumb
assist opposition of thumb

Opponens Pollicis
O: flexor retinaculum and tubercle of the trapezium
I: entire length of first metacarpal bone, radial surface
A: opposition of thumb at carpometacarpal jt

Adductor Pollicis (largest and strongest of short thumb mm)
O: capitate, second and third metacarpals
I: base of proximal phalanx of thumb
A: adduct the thumb
assist flex thumb

Lumbricals of hand
O: surfaces of flexor digitorum profundus tendon
I: Extensor aponeurosis on dorsal surface of phalanges
A: extend the 2-5 fingers at the interphalangeal jt
flex 2-5 at the metacarpophalangeal jt

Palmar Interossei
O: base of 1,2,4,5 metacarpals (no 3)
I: base of the proximal phalanx of the related finger and the extensor aponeurosis
A: adduct thumb, 2,4,5 fingers toward the 3rd finger
assist flex of 1,2,4,5 at metacarpophalangeal jt
assist extend 1,2,4,5 at interphalangeal jt

Dorsal Interossei
O: adjacent sides of all metacaarpals
I: base of proximal phalanx of 2,3,4 and the extensor aponeurosis
A: abduct 2,3,4 at metacarpophalangeal jt
assist flex 2,3,4 at metacarpophalangeal jt
assis extend 2,3,4 at interphalangeal jt

Abductor Digiti Minimi
O: pisiform and tendon of flexor carpi ulnaris
I: base of proximal phalanx of 5th finger, ulnar surface
A: abduct 5th finger
assist in opposition of 5th toward 1st

Flexor Digiti Minimi Brevis
O: hook of hamate and flexor retinaculum
I: base of proximal phalanx of 5th finger, palmar surface
A: flex 5th
assist opposition

Opponens Digiti Minimi
O: hook of hamate and flexor retinaculum
I: shaft of 5th metacarpal, ulnar surface
A: Opposition of 5th at carpometacarpal jt

Other structures:
Radial Collateral Ligament
Annular Ligament - nurse maid elbow
Ulnar collateral ligament
Ulnar nerve "funny bone"
Olecranon bursa
Interosseous membrane
flexor and extensor retinaculum
radial and ulnar arteries