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23 Cards in this Set
- Front
- Back
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- chief medial rotator of humerus
- helps to hold humerus head in glenoid cavity (stabilizes shoulder joint) |
subscapularis
(rotator cuff) |
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- stabilizes shoulder joint
- prevents downward dislocation of humerus when carrying heavy objects |
supraspinatus
(rotator cuff) |
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- holds humerus head in glenoid cavity
- rotates humerus laterally |
infraspinatus
(rotator cuff) |
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- holds humerus head in glenoid cavity
- rotates humerus laterally - adducts arm |
teres minor
(rotator cuff) |
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extends, adducts & medially rotates humerus
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teres major
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- flexes arm (PM)
- rotates arm medially (climbing, throwing, pushing muscle) |
pectoralis major
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- draws scapula forward and downward
- draws ribcage superiorly |
pectoralis minor
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- abducts arm (PM) - all fibers
- flexes, medially rotates humerus - anterior fibers - extends, laterally rotates arm (swing arm) - posterior fibers |
deltoid
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- extends forearm at elbow (PM)
- stabilizes shoulder joint |
triceps brachii
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- flexes elbow joint
- supinates forearm (twist and pulling action) |
biceps brachii
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major forearm flexor (PM)
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brachialis
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- forearm flexion at elbow (synergist)
- stabilizes elbow |
brachioradialis
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pronates forearm
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pronator teres
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- powerful wrist flexor (PM)
- abducts hand |
flexor carpi radialis
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weak wrist flexor
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palmeris longus
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- powerful wrist flexor (PM)
- abducts hand |
flexor carpi ulnaris
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flexes distal phalanx of thumb
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flexor pollicis longus
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flexes wrist & middle phalanges of fingers 1-5
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flexor digitorum superficialis
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extends, abducts wrist
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extensor carpi radialis longus
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- extends and abducts wrist
- steadies wrist during flinger flexion |
extensor carpi radialis brevis
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- extends fingers (PM)
- extends wrist |
extensor digitorum
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extends wrist (hand), synergist in adducting wrist
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extensor carpi ulnaris
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- abducts, extends thumb
- abducts wrist |
abductor pollicis longus
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