Lecture Exam 2 Flashcards by Cece Robinson

Serratus Anterior

Origin: upper 8 ribs
Insertion: anterior vertebral border of scapula
Action: pulls scapula forward and downward
Innervation: long thoracic nerve

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Pectoralis Minor

Origin: sternal ends of 3rd-5th ribs
Insertion: coracoid process of scapula
Action: pulls scapula forward and downward
Innervation: medial pectoral nerve

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Trapezius

Origin: occipital bone and spines of C7 and all thoracic vertebrae
Insertion: clavicle, spine of scapula, and acromion process
Action: elevates scapula, draws head back, adducts scapula, braces shoulders
Innervation: Accessory Nerve

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Levator Scapulae

Origin: C1-C4
Insertion: vertebral border of scapula
Action: elevates scapula
Innervation: Dorsal Scapular Nerve

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Rhomboideus Major

Origin: spines of T2-T5
Insertion: vertebral border of scapula
Action: elevates and adducts scapula
Innervation: dorsal scapular nerve

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Rhomboideus Minor

Origin: C7-T1
Insertion: vertebral border of scapula
Action: elevates and adducts scapula
Innervation: dorsal scapular

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Pectoralis Major

Origin: clavicle, sternum, and costal cartilage
Insertion: crest of greater tubercle of humerus
Action: flexes, adducts, and rotates arm medially
Innervation: lateral pectoral nerve

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Latissimus Dorsi

Origin: spines of sacral, lumbar, and lower thoracic vertebrae
Insertion: intertubercular groove of humerus
Action: extends, adducts, and rotates humerus medially, retracts shoulder
Innervation: thoracodorsal nerve

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Deltoid

Origin: clavicle, acromion process, and spine of scapula
Insertion: deltoid tuberosity of humerus
Action: abducts arms, extends and flexes humerus
Innervation: Axillary nerve

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Supraspinatus

Origin: supraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: abducts and laterally rotates humerus
Innervation: Subscapular

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Infraspinatus

Origin: infraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: rotates arm laterally
Innervation: Subscapular

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Teres Minor

Origin: lateral border of scapula
Insertion: greater tubercle and groove of humerus
Action: rotates arm laterally
Innervation: axillary nerve

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Teres Major

Origin: inferior angle and lateral border of scapula
Insertion: crest of lesser tubercle of humerus
Action: extends humerus, adducts, and rotates arm medially
Innervation: lower subscapular

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Subscapularis

Origin: subscapular fossa of scapula
Insertion: lesser tubercle of humerus
Action: rotates are medially
Innervation: upper and lower subscapular

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Coracobrachialis

Origin: coracoid process of scapula
Insertion: shaft of humerus
Action: flexes and adducts shoulder
Innervation: thoracodorsal nerve

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Biceps Brachii

Origin: coracoid process; supraglenoid fossa
Insertion: radial tuberosity
Action: flexes and supinates forearm
Innervation: musculocutaneous nerve

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Brachialis

Origin: anterior shaft of humerus
Insertion: coronoid process of ulna
Action: flexes forearm
Innervation: Musculocutaneous nerve

Brachioradialis

Origin: lateral supracondylar ridge
Insertion: styloid process of radius
Action: flexes forearm
Innervation: radial

Triceps Brachii

Origin: infraglenoid fossa; lateral and medial humerus
Insertion: olecranon process of ulna
Action: extends forearm
Innervation: radial nerve

Extensor Carpi Radialis Longus

Origin: lateral epicondyle of humerus
Insertion: 2nd metacarpal
Action: extends and abducts hand
Innervation: radial nerve

Extensor Carpi Radialis Brevis

Origin: lateral epicondyle of humerus
Insertion: 3rd metacarpal
Action: extends and abducts hand
Innervation: radial nerve

Abductor Pollicis Longus

Origin: distal radius and ulna
Insertion: base of 1st metacarpal
Action: abducts thumb
Innervation: radial nerve

Extensor Pollicis Brevis

Origin: flexor retinaculum and carpals
Insertion: proximal phalanx of thumb
Action: abducts thumb
Innervation: radial nerve

Extensor Pollicis Longus

Origin: shaft of ulna
Insertion: distal phalanx of thumb
Action: extends thumb
Innervation: radial nerve

Extensor Digitorum

Origin: lateral epicondyle of humerus Insertion: phalanges Action: extends wrist and digits Innervation: radial nerve

Extensor Carpi Ulnaris

Origin: lateral epicondyle of humerus Insertion: base of 5th metacarpal Action: extends and adducts wrist Innervation: radial nerve

Flexor Carpi Ulnaris

Origin: medial epicondyle of humerus Insertion: carpals and metacarpals Action: flexes and adducts wrist Innervation: Median

Flexor Digitorum Superficialis

Origin: medial epicondyle of humerus Insertion: middle phalanges Action: flexes wrist, hand, and digits Innervation: median nerve

Palmaris Longus

Origin: medial epicondyle of humerus Insertion: palmar aponeurosis Action: flexes wrist Innervation: median nerve

Flexor Carpi Radialis

Origin: medial epicondyle of humerus Insertion: base of metacarpals Action: flexes and abducts hands Innervation: median nerve

Flexor Pollicis Longus

Origin: shaft of radius Insertion: distal phalanx of thumb Action: flexes thumb Innervation: median nerve

Pronator Quadratus

Origin: distal 4th of ulna Insertion: distal 4th of radius Action: pronates hand Innervation: median nerve

Pronator Teres

Origin: medial epicondyle of humerus Insertion: lateral surface of ulna Action: pronates forearm Innervation: median nerve

Supinator

Origin: lateral epicondyle of humerus Insertion: lateral surface of ulna Action: supinates forearm Innervation: radial nerve

Abductor Pollicis Brevis

Origin: flexor retinaculum Insertion: lateral base of proximal phalanx Action: abducts thumb and helps oppose it Innervation: median nerve

Flexor Pollicis Brevis

Origin: flexor retinaculum Insertion: lateral base of proximal phalanx Action: flexes thumb Innervation: median nerve

Opponens Pollicis

Origin: flexor retinaculum Insertion: medial side of 1st metacarpal Action: pulls and rotates thumb medial toward palm Innervation: median nerve

Adductor pollicis

Origin: base of 2nd and 3rd metacarpal;anterior surface of 3rd metacarpal Insertion: medial side of base of proximal phalanx of thumb Action: adduct thumb Innervation: ulnar nerve

Abductor Digiti Minimi

Origin: pisiform Insertion: medial base of proximal phalanx of little finger Action: abducts digit 5 Innervation: ulnar nerve

Flexor Digiti Minimi Brevis

Origin: hook of hamulus and flex retinaculum Insertion: medial base of proximal phalanx of little finger Action: flexes proximal phalanx of digit 5 Innervation: ulnar nerve

Oppones Digiti Minimi

Origin: hook of hamulus and flexor retinaculum Insertion: medial border of 5th metacarpal Action: draws 5th digit anterior and rotates medially Innervation: ulnar nerve

lumbricles

Origin: tendons of flexor digitorum profundus Insertion: lateral sides of extensor expansions of digits 2-5 Action: flex digits at metacarpophalangeal joints Innervation: median nerve (1-2), ulnar (3-4)