Upper Extremity Muscles
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32 Terms
Pectoralis Minor
Action - protracts and depresses scapula
Serratus Anterior
Action - protracts (abducts) scapula
Trapezius
Action - superior portion elevates scapula; inferior portion depresses scapula
Levator Scapulae
Action - elevates scapula
Romboid Minor and Major
Action - retracts (adducts) scapula
Pectoralis Major
Action - adducts, rotates, and flexes humerus
Latissimus Dorsi
Action - extends, adducts, and rotates humerus
Deltoid
Action - lateral fibers abduct humerus; anterior fibers flex humerus; posterior fibers extend humerus
Innervation - axillary
Teres Major
Action - adducts, rotates, and extends humerus
Subscapularis
Action - stabilizes shoulder joint
Suprascapularis
Action - abducts humerus; stabilizes shoulder joint
Infrascapularis
Action - stabilizes shoulder joint
Teres Minor
Action - stabilizes shoulder joint
Innervation - axillary
Biceps Brachii (long head)
Action - flexes antebrachium, supinates antebrachium, and flexes humerus
Innervation - Musculocutaneous
Biceps Brachii (short head)
Action - flexes antebrachium, supinates antebrachium, and flexes humerus
Innervation - Musculocutaneous
Brachialis
Action - flexes antebrachium
Innervation - Musculocutaneous
Branchioradialis
Action - flexes antebrachium
Innervation - Radial
Triceps Brachii (lateral head)
Action - extends antebrachium
Innervation - Radial
Triceps Branchii (long head)
Action - extends antebrachium, extends humerus
Innervation - Radial
Supinator
Action - supinates antebrachium
Innervation - Radial
Pronator Teres
Action - pronates antebrachium
Innervation - Median
Flexor Carpi Radialis
Action - flexes and abducts hand
Innervation - Median
Flexor Carpi Ulnaris
Action - flexes and abducts hand
Innervation - Ulnar
Flexor Digitorum Superficialis
Action - flexes hand at wrist; flexes digits 2-5 at metacarpophalangeal and proximal interphalangeal joints
Innervation - Median
Flexor Digitorum Profundus
Action - flexes hand at wrist and all phalanges of digits 2-5 at all joints
Innervation - median to later half; ulnar to medial half
Flexor Pollicis Longus
Action - flexes all phalanges of digit 1 at all joints
Innervation - median
Extensor Carpi Radialis
Action - extends and abducts hand
Innervation - radial
Extensor Carpi Ulnaris
Action - extends and abducts hand
Innervation - radial
Extensor Digitorum
Action - entends hand and all phalanges of digits 2-5
Innervation - radial
Extensor Pollicis Longus
Action - entends all phalanges of digit 1; extends metacarpal 1
Innervation - radial
Extensor Pollicis Brevis
Action - extends proximal phalanx of digit 1 at metacarpophalangeal joint; extends metacarpal 1
Innervation - radial
Abductor Pollicis Longus
Action - abducts and extends digit 1 at carpometacarpal joint; abducts hand at wrist joint
Innervation - radial