Actions Flashcards
action of pec major
adduction, IR of humerus; clavicular head flexes humerus
action of pec minor
downward rotation of scapula; stabilizes scapula inferiorly and anteriorly
action of subclavius
anchors & depresses clavicle
action of supraspinatus
initiates abduction; ER when arm is flexed (throwing motion), weak IR (depending upon position)
action of infraspinatus
ER
action of teres minor
ER
action of subscapularis
IR
what motion do the rotator cuff muscles perform together
hold the humeral head in the glenoid cavity
action of deltoid
anterior: flexion & IR
middle: abduction
posterior: extension & ER
action of teres major
adduction & IR
action of coracobrachialis
flexion & adduction of humerus
action of biceps brachii
supinates forearm; flexes forearm when supinated
action of brachialis
flexes forearm (all positions)
action of triceps brachii
extends the forearm
action of anconeus
assists triceps with extension; stabilizes forearm
action of brachioradialis
flexion of forearm (most effective in neutral position)
action of pronator teres
pronates & flexes forearm
action of flexor carpi radialis
flexes & radial deviates hand
action of flexor carpi ulnaris
flexes & ulnar deviates hand
action of palmaris longus
flexes hand & tenses palmar aponeurosis
action of flexor digitorum superficialis
flexes proximal & middle phalanges 2-5
action of flexor digitorum profundus
flexes distal phalanges 2-5
action of flexor pollicis longus
flexes phalanges of thumb
action of pronator quadratus
pronates forearm; binds radius & ulna together (deep)
action of extensor carpi radialis longus
extend & radially deviate hand
action of extensor carpi radialis brevis
extend & radially deviate hand
action of extensor digitorum
extends digits 2-5 at MCP joint
action of extensor digiti minimi
extends 5th digit
action of extensor carpi ulnaris
extends wrist & ulnar deviation
action of supinator
supinates forearm
action of abductor pollicis longus
abducts thumb and extends it at CMC joint
action of extensor pollicis brevis
extends proximal phalanx, extends MCP
action of extensor pollicis longus
extends distal phalanx, extends MCP and CMC joint at thumb
action of extensor indicis
extends 2nd digit
