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AOIN (Actions, Origins, Insertions, Nerve supply) Worksheet.
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Muscle Name
Action of
muscle
Origin of muscle
Insertion of
muscle
Nerve Supply
Pronator teres
Pronation of
forearm
Medial epicondyle Lateral radius
Median nerve
Pronator quadratus
Pronates
forearm
Anterior surface
distal ulna
Anterior distal
radius
Median nerve
Supinator (posterior)
Forearm
Supinaton
Lateral epicondyle Proximal
lateral radius
Radial nerve
Flexor carpi radialis
(anterior)
Wrist flexion
hand
abduction
Medial epicondyle Base of 2/3rd
of humerus
metacarpals
Median nerve
Palmaris longus
(anterior)
wrist flexion
Medial epicondyle Palmar
of humerus
aponeurosis
Median nerve
Flexor carpi ulnaris
(medial)
Flexion of
wrist, hand
adduction
Medial epicondyle Base of 5th
metacarpal
Ulnar nerve
Flexor digitorum
superficialis
Flexion of
wrist
Medial epicondyle Shafts of
middle
phalanges 2-5
Median nerve
Flexor pollicis longus
Abduction of
wrist
Interosseous
membrane
Palmar side of
distal phalanx
digit 1
Median nerve
Flexor digitorum
profundus (anterior)
Flexion of
wrist
Interosseous
membrane
base+ palmar
surface of
distal
phalanges of
digits 2-5
Median/ulnar
nerve
Extensor carpi
radialis longus
Extension of
wrist
Distal humerus
Extensor carpi
radialis brevis
Extension of
wrist
Lateral epicondyle Dorsal base of
3rd metacarpal
Radial nerve
Extensor digitorum
Extension of
wrist
Lateral epicondyle Dorsal digit
expansion of
2-5th digits
Radial nerve
Extensor digiti minimi
Extends and
ulnar
abduction of
the wrist
Lateral epicondyle Extensor
digitorum
tendon of the
5th digit
Posterior
interosseous
nerve (from
radial)
Extensor carpi ulnaris Extension and
(medial)
Radial Nerve
adduction of
the wrist
Lateral epicondyle Medial side of
the 5th
metacarpal
Brachialis
Flexion of
elbow joint
Distal anterior
humerus
Brachioradialis
Elbow flexion Distal lateral
supracondyle
ridge of humerus
Radial styloid
process
Radial Nerve
Triceps
Elbow
extension
Posterior medial
humerus
Olecranon
process
radial nerve
Lateral Head
“
Posterior lateral
humerus
“
“
Long Head
“ + extension
adduction of
shoulder
Infraglenoid
“
tubercle of scapula
“
Interosseous
membrane
Median nerve
Medial Head
Flexor polllicis longus Abduction of
wrist
Dorsal base of Radial nerve
2nd metacarpal
Coronoid
Musculocutan
process of ulna eous nerve
Palmer side of
1st metacarpal
bone