Anatomy Lab: Muscles (Upper Extremity)

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137 Terms

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Muscles of the Pectoral Girdle (Anterior View) - 3 total + 1 rotator cuff

deltoid, pectoralis major, pectoralis minor, serratus anterior

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Deltoid

o: clavicle, spine of the scapula / i: deltoid tuberosity

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Deltoid - Action

shoulder flexion, abduction, extension

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Deltoid - Innervation

axillary nerve

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Pectoralis Major (shoulder joint)

o: clavicle, sternum, ribs / i: humerus (greater tubercle)

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Pectoralis Major - Action

shoulder flexion, adduction, internal rotation

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Pectoralis Major - Innervation

lateral/medial pectoral nerve

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Pectoralis Minor (start of deep muscle)

o: ribs / i: coracoid process

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Pectoralis Minor - Action

protraction of the scapula

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Pectoralis Minor - Innervation

lateral/medial pectoral nerve

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Serratus Anterior

o: ribs / i: scapula

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Serratus Anterior - Action

protraction of the scapula

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Serratus Anterior - Innervation

long thoracic nerve

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Subscapularis (Rotator Cuff Muscle)

o: subscapular fossa / i: humerus

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Subscapularis - Action

shoulder internal rotation

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Subscapularis - Innervation

subscapular nerve

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Muscles of the Pectoral Girdle (Posterior View) - 6 total + 3 rotator cuff

trapezius, latissimus dorsi, levator scapulae, rhomboid minor/major, teres major

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Trapezius

o: occipital bone, cervical and thoracic vertebrae / i: spine of the scapula, acromion

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Trapezius - Action

scapular elevation, retraction, depression

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Trapezius - Innervation

accessory nerve

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Latissimus Dorsi

o: iliac crest, thoracic and lumbar vertebrae / i: intertubercular sulcus

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Latissimus Dorsi - Action

shoulder extension, adduction, internal rotation

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Latissimus Dorsi - Innervation

thoracodorsal nerve

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Levator Scapulae (start of deep muscle)

o: transverse process on the cervical spine / i: scapula

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Levator Scapulae - Action

elevation of the scapula

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Levator Scapulae - Innervation

dorsal scapular nerve

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Rhomboid Minor/Major

o: spinous process of the thoracic spine / i: scapula

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Rhomboid Minor/Major - Action

retraction of the scapula

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Rhomboid Minor/Major - Innervation

dorsal scapular nerve

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Teres Major (shoulder joint)

o: scapula / i: humerus (lesser tubercle)

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Teres Major - Action

shoulder extension, adduction, internal rotation

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Teres Major - Innervation

subscapular nerve

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Supraspinatus (rotator cuff)

o: supraspinous fossa / i: humerus (greater tubercle)

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Supraspinatus - Action

abduction of the shoulder

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Supraspinatus - Innervation

suprascapular nerve

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Infraspinatus (Rotator Cuff)

o: infraspinous fossa / humerus (greater tubercle)

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Infraspinatus - Action

shoulder external rotation

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Infraspinatus - Innervation

suprascapular nerve

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Teres Minor (Rotator Cuff)

o: scapula / i: humerus (greater tubercle)

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Teres Minor - Action

shoulder external rotation

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Teres Minor - Innervation

axillary nerve

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Muscles of the Arm (Anterior View) - 3 total

biceps brachii (long head/short head), coracobrachialis, brachialis

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Biceps Brachii (Long Head)

o: supraglenoid tubercle / i: radial tuberosity

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Biceps Brachii (Long Head) - Action

shoulder/elbow flexion

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Biceps Brachii (Long Head) - Innervation

musculocutaneous nerve

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Biceps Brachii (Short Head)

o: coracoid process / i: radial tuberosity

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Biceps Brachii (Short Head) - Action

shoulder/elbow flexion

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Biceps Brachii (Short Head) - Innervation

musculocutaneous nerve

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Coracobrachialis (start of deep muscles)

o: coracoid process / i: shaft of the humerus

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Coracobrachialis - Action

shoulder flexion

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Coracobrachialis - Innervation

musculocutaneous nerve

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Brachialis

o: shaft of the humerus / i: coronoid process

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Brachialis - Action

elbow flexion

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Brachialis - Innervation

musculocutaneous nerve

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Muscles of the Arm (Posterior View) - 2 total

triceps brachii (long, lateral, medial heads), anconeus

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Triceps Brachii (Long Head)

o: infraglenoid tubercle / i: olecranon process

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Triceps Brachii (Long Head) - Action

shoulder/elbow extension

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Triceps Brachii (Long Head) - Innervation

radial nerve

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Triceps Brachii (Lateral Head)

o: proximal shaft of the humerus / i: olecranon process

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Triceps Brachii (Lateral Head) - Action

elbow extension

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Triceps Brachii (Lateral Head) - Innervation

radial nerve

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Triceps Brachii (Medial Head)

o: distal shaft of the humerus / i: olecranon process

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Triceps Brachii (Medial Head) - Action

elbow extension

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Triceps Brachii (Medial Head) - Innervation

radial nerve

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Anconeus

o: lateral epicondyle of the humerus / i: olecranon process

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Anconeus - Action

elbow extension

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Anconeus - Innervation

radial nerve

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Muscles of the Forerm (Anterior View) - 8 total

pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris, flexor digitorum superficialis, flexor pollicis longus, flexor digitorum profundus, pronator quadratus

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Pronator Teres

o: medial epicondyle of the humerus / i: radius

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Pronator Teres - Action

pronation of forearm

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Pronator Teres - Innervation

median nerve

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Flexor Carpi Radialis

o: medial epicondyle of the humerus / i: metacarpals

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Flexor Carpi Radialis - Action

wrist flexion, radial deviation

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Flexor Carpi Radialis - Innervation

median nerve

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Palmaris Longus

o: medial epicondyle of the humerus / i: palmar aponeurosis

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Palmaris Longus - Action

no action, doesn't touch bones

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Palmaris Longus - Innervation

median nerve

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Flexor Carpi Ulnaris

o: medial epicondyle of the humerus / i: metacarpals

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Flexor Carpi Ulnaris - Action

flexion of the wrist, ulnar deviation

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Flexor Carpi Ulnaris - Innervation

ulnar nerve

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Flexor Digitorum Superficialis (median muscle)

o: medial epicondyle of the humerus / i: middle phalanx of digits 2-5

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Flexor Digitorum Superficialis - Action

finger flexion

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Flexor Digitorum Superficialis - Innervation

median nerve

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Flexor Pollicis Longus (start of deep muscles)

o: radius / i: distal phalanx of the thumb

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Flexor Pollicis Longus - Action

thumb flexion

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Flexor Pollicis Longus - Innervation

median nerve

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Flexor Digitorum Profundus

o: ulna / i: distal phalanx of digits 2-5

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Flexor Digitorum Profundus - Action

finger flexion

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Flexor Digitorum Profundus - Innervation

ulnar/median nerve

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Pronator Quadratus

o: ulna / i: radius

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Pronator Quadratus - Action

pronation of forearm

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Pronator Quadratus - Innervation

median nerve

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Muscles of the Forerm (Posterior View) - 11 total

brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, supinator, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, extensor indicis

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Brachioradialis

o: lateral epicondyle / i: radius

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Brachioradialis - Action

elbow flexion

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Brachioradialis - Innervation

radial nerve

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Extensor Carpi Radialis Longus

o: lateral epicondyle / i: metacarpals

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Extensor Carpi Radialis Longus - Action

wrist flexion, radial deviation

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Extensor Carpi Radialis Longus - Innervation

radial nerve

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Extensor Carpi Radialis Brevis

o: lateral epicondyle / i: metacarpals