Hand Muscles Flashcards
Superficial flexors of the wrist (essentially all come from medial epicondyle of humerus and are supplied by the median nerve except FCU), anterior compartment
Pronator teres, FCU, FCR, FDS, palmaris longus
Deep flexors of the wrist, (anterior compartment) all supplied by anterior interosseous membrane
FPL, FDP, pronator quadratus
Superficial extensors of wrist (posterior compartment) all posterior interosseous nerve except brachioradialis, all come from lateral epicondyle but ECRL and brachioradialis come from lateral supracondylar ridge of humerus
ECRB, ECRL, ECU, brachioradialis, EDM, ED
What are the deep extensors of the wrist (posterior compartment), all supplied by posterior interosseous nerve except supinator
EI, APL, EPL, EPB, supinator
Abductors (radial deviation) of the wrist
ECRB, ECRL, FCR
Adductors (ulna deviation) of wrist
ECU, FCU
Origins, insertions and nerve supply of flexor carpi radialis
Origins: medial epicondyle of humerus
Insertions: palmar surface of bases of metacarpals 2 and 3
Nerve supply: median nerve
Origins, insertions and nerve supply of palmaris longus
Origins: medial epicondyle of humerus
Insertions: flexor retinaculum and apex of palmar aponeurosis
Nerve supply: median nerve
Origin, insertion and nerve supply of flexor carpi ulnaris
Origin: medial epicondyle of humerus, medial border of olecranon, post border of ulna
Insertion: pisiform, hook of hamate, base of metacarpal 5
Nerve supply: ulna nerve
Origins, insertions and nerve supply of flexor digitorum superficialis
Origins: 2 heads from medial epicondyle and coronoid process of ulna, proximal 2/3 anterior border of radius
Insertions: side of palmar surface of middle phalanx of each finger
Nerve supply: median nerve
What are the origins, insertions and nerve supply of pronator teres
Origins:medial epicondyle and coronoid process of ulna
Insertions: middle of lateral surface of radius
Nerve supply: median nerve
What is the origin, insertion and nerve supply of flexor digitorum profundus
Origins: medial side of coronoid process and medial surface of ulna and interosseous membrane
Insertions: by 4 tendons, base of palmar surface of signal phalanx of each finger
Nerve supply: anterior interosseous nerve
What are the origins, insertions and nerve supply of flexor pollicis longus
Origin: anterior surface of radius and adjacent interosseous membrane
Insertion: palmar surface base of distal phalanx of thumb
Nerve supply: anterior interosseous nerve
Origins, insertions and nerve supply of pronator quadratus
Origins: distal part, anterior shaft of ulna
Insertions:distal part anterior shaft of radius
Nerve supply: anterior interosseous nerve
What are the origins, insertions and nerve supply of extensor carpi radialis longus
Origins: lateral supracondylar ridge of humerus
Insertions: post surface base of metacarpal 2
Nerve supply: posterior interosseous nerve
What are the origins, insertions and nerve supply of Extensor carpi radial side brevis
Origins: lateral epicondyle of humerus
Insertions: post surface base of metacarpal 3
Nerve supply: posterior interosseous nerve
Origins, insertions and nerve supply of extensor carpi ulnaris
Origins: lateral epicondyle of humerus by shared aponeurosis, posterior border of ulna
Insertions: medial side base of metacarpal 5
Nerve supply: posterior interosseous nerve
What are the origins, insertions and nerve supply of extensor digitorium
Origins: lateral epicondyle of humerus
Insertions: 4 tendons: base and signal phalanges of each finger
Nerve supply: posterior interosseous nerve
What are the origins, insertions and nerve supply of extensor digiti minimi
Origin: lateral epicondyle of humerus
Insertions: dorsal digital expansion of digit 5
Nerve supply: posterior interosseous nerve
What are the origins, insertions and nerve supply of brachioradialis
Origins: lateral supracondylar ridge of humerus, ECRL also has this as one of its insertions
Insertions: lateral side of radius proximal to radial styloid process
Nerve supply: radial nerve
What are the origins, insertions and nerve supply of extensor indicis
Origins: post ulna and interosseous membrane
Insertions: dorsal digital expansion of index finger
Nerve supply: posterior interosseous nerve
What are the origins, insertions and nerve supply of extensor pollicis longus
Origins: post surface of middle 1/3 of ulna and interosseous membrane
Insertions: dorsal surface of base of distal phalanx of thumb
Nerve supply: posterior interosseous nerve
What are the origins, insertions and nerve supply of extensor pollicis brevis
Origins: post surface of middle ulna and interosseous membrane
Insertions: dorsal surface of base proximal phalanx of thumb
Nerve supply: posterior interosseous nerve
What are the origins, insertions and nerve supply of abductor pollicis longus
Origins:post surface of ulna and middle radius, intervening interosseous membrane
Insertions: radial side base of metacarpal
Nerve supply: posterior interosseus nerve
What are the origins, insertions and nerve supply of supinator
Origins: lateral epicondyle of humerus, radial collateral and annular ligaments, supinator fossa and crest of ulna
Insertions: post NS surface of proximal 1/3 of ulna
Nerve supply: radial nerve
What muscles are in the thenar eminence and what do they do
Flexor pollicis brevis, abductor pollicis brevis, opponens brevis, adductor pollicis they do precision movements and pincer grip
What muscles are in the hypothenar eminence and what do they do
Abductor digiti minimi, flexor digiti minimi, opponens digiti minimi, palmaris brevis, they increase the hollow of the palm, grasp large objects and do opposition of the little finger (precision)
What do the dorsal interossei do (DAB)
Dorsal abduct
What do the palmar interossei do (PAD)
Palmar adduct
What’s the function of the interossei
Extension of IP joints, flexion of MCP joints, abduction/ adduction of MCPS
