UE myology: Fall 2026
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32 Terms
PA: Brachialis
Distal ½ of anterior surface of humerus
DA: Brachialis
Coronoid process and ulnar tuberosity
A: Brachialis
Elbow flexion
N: Brachialis
Musculocutaneous (C5,C6) and radial (C5, C7)
PA: Aconeus
Lateral epicondyle of humerus
DA: Aconeus
Lateral surface of olecranon and superior part of posterior surface of ulna
A: Aconeus
Elbow extension, stabilizes elbow joint
N: Aconeus
Radial (C7, C8, T1)
PA: Palmaris Longus
Medial epicondyle of humerus (common flexor origin)
DA: Palmaris Longus
Distal half of flexor retinaculum and apex of palmar aponeurosis
A: Palmaris Longus
Wrist flexion, tenses palmar aponeurosis
N: Palmaris Longus
Median (C7,C8)
PA: Flexor Digitorum Superficialis
Humeroulnar head: medial epicondyle (common flexor origin) coronoid process
Radial head: superior ½ of anterior border of radius
DA: Flexor Digitorum Superficialis
Shafts of middle phalanges 2nd-5th digits
A: Flexor Digitorum Superficialis
PIP and MP flexion
N: Flexor Digitorum Superficialis
Median (C7,C8, T1)
PA: Flexor Digitorum Profundus
Proximal ¾ of medial and anterior surface of ulna and interosseous membrane
DA: Flexor Digitorum Profundus
Medial Part: Base of distal phalanges of 4th and 5th digits
Lateral Part: Base of distal phalanges of 2nd and 3rd digits
A: Flexor Digitorum Profundus
DIP flexion of 2nd-5th digits
N: Flexor Digitorum Profundus
Medial part: Ulnar T1
Lateral part: Median (anterior interosseous) C8
PA: Flexor Pollicis Longus
Anterior surface of radius and adjacent interosseous membrane
DA: Flexor Pollicis Longus
Base of distal phalanx of 1st digit
A: Flexor Pollicis Longus
IP and MP flexion of 1st digit
N: Flexor Pollicis Longus
Median (anterior interosseous) C8
PA: Extensor Digitorum
Lateral epicondyle of humerus (common extensor origin)
DA: Extensor Digitorum
Extensor expansiones of 2nd-5th digits
A: Extensor Digitorum
MP, DIP, and PIP extension of 2nd-5th digits
N: Extensor Digitorum
Radial (posterior interosseous) C7
PA: Extensor Digiti Minimi
Lateral epicondyle of humerus (common extenosor origin)
DA: Extensor Digiti Minimi
Extensor expansion of 5th digit
A: Extensor Digiti Minimi
MP, DIP, PIP extension of 5th digit
N: Extensor Digiti Minimi
Radial (posterior interosseous) C7