Lecture Exam 2 Flashcards
Serratus Anterior
Origin: upper 8 ribs
Insertion: anterior vertebral border of scapula
Action: pulls scapula forward and downward
Innervation: long thoracic nerve
Pectoralis Minor
Origin: sternal ends of 3rd-5th ribs
Insertion: coracoid process of scapula
Action: pulls scapula forward and downward
Innervation: medial pectoral nerve
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
Levator Scapulae
Origin: C1-C4
Insertion: vertebral border of scapula
Action: elevates scapula
Innervation: Dorsal Scapular Nerve
Rhomboideus Major
Origin: spines of T2-T5
Insertion: vertebral border of scapula
Action: elevates and adducts scapula
Innervation: dorsal scapular nerve
Rhomboideus Minor
Origin: C7-T1
Insertion: vertebral border of scapula
Action: elevates and adducts scapula
Innervation: dorsal scapular
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
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
Deltoid
Origin: clavicle, acromion process, and spine of scapula
Insertion: deltoid tuberosity of humerus
Action: abducts arms, extends and flexes humerus
Innervation: Axillary nerve
Supraspinatus
Origin: supraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: abducts and laterally rotates humerus
Innervation: Subscapular
Infraspinatus
Origin: infraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: rotates arm laterally
Innervation: Subscapular
Teres Minor
Origin: lateral border of scapula
Insertion: greater tubercle and groove of humerus
Action: rotates arm laterally
Innervation: axillary nerve
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
Subscapularis
Origin: subscapular fossa of scapula
Insertion: lesser tubercle of humerus
Action: rotates are medially
Innervation: upper and lower subscapular
Coracobrachialis
Origin: coracoid process of scapula
Insertion: shaft of humerus
Action: flexes and adducts shoulder
Innervation: thoracodorsal nerve
Biceps Brachii
Origin: coracoid process; supraglenoid fossa
Insertion: radial tuberosity
Action: flexes and supinates forearm
Innervation: musculocutaneous nerve
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)
