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PTA

Upper Extremity Muscle's O, I, A, N

MuscleOriginInsertionNerveActivity
Levator Scapula Transverse processes of first four cervical vertebrae Vertebral border of scapula between the superior angle and spine C3, C4, dorsal scapular (C5) Scapular elevation and downwards rotation
Rhomboid Spinous processes of C7 through T5 Vertebral border of scapula between the spine and inferior angle Dorsal scapular (C5) Scapular retraction, elevation, and downward rotation
Serratus Anterior Lateral Surface of the upper eight ribs Vertebral border of the scapula, anterior surface Long thoracic (C5,C6,C7) Scapular protraction and upward rotation
Pectoralis Minor Anterior surface, third through fith rib Coracoid process of the scapula Medial pectoral (C8,T1) Scapular depression, protraction, downward rotation and tilt
Anterior Deltoid Lateral third of the clavicle Deltoid tuberosity Axillary (C5,C6) Shouldr abduction, flexion, medial rotation and horizontal adduction
Middle Deltoid Acromion process Deltoid tuberosity Axillary (C5,C6) Shoulder abduction
Posterior Deltoid Spine of scapula Deltoid tuberosity Axillary (C5,C6) Shouler abduction, extension, hyperextension, lateral rotation, horizontal abduction
Supraspinatus Suprasinous fossa of the scapula Greater tubercle of the humerus Suprascapular (C5,C6) Shoulder abduction
Pectoralis Major- Clavicular portion Medial third of clavicle Lateral lip of bicipital groove of humerus Lateral and medial pectoral(C5,C6,C7,C8,T1) Shoulder flexion- first 60 degrees, adduction, medial rotation, and horozontal adduction
Pectoralis Major- Sternal portion Sternum, costal cartilage of first six ribs Lateral lip of bicipital groove of humerus Lateral and medial pectoral(C5,C6,C7,C8,T1) Shoulder extension- 180 to 120 degrees, adduction, medial rotation, and horozontal adduction
Latissimus Dorsi Spinous processes of T7 through L5 (fascia), posterior surface of sacrum, iliac crest and lower three ribs Medial lip of bicipital groove of humerus Thoracodorsal (C6,C7,C8) Shoulder extension, adduction, medial rotation, hyperextension
Teres Major Axillary border of Scapular near the inferior angle Crest below lesser tubercle next to the latissimus dorsi muscle attachment Subscapular (C5,C6) Shoulder extension, adduction and medial rotation
Infraspinatus Infraspinous fossa of scapula Greater tubercle of humerus Suprascapular (C5,C6) Shoulder lateral rotation, Horizontal abduction
Teres Minor Axillary border of scapula Greater tubercle of humerus Axillary (C5,C6) Shoulder lateral rotation, horizontal abduction
Subscapularis Subscapular fossa of the scapula Lesser tubercle of the humerus Subscapular (C5,C6) Shoulder medial rotation
Coracobrachialis Coracoid process of the scapula medial surface of the humerus near midpoint Musculocutaneous (C6,C7) Stabilizes the shoulder join
Brachialis Distal half of humerus, anterior surface Coronoid process and ulnar tuberosity of the ulna Musculocutaneous (C6,C7) Elbow Flexion
Biceps Brachii Long head-Supraglenoid tubercle of scapula. Short head- coracoid process of scapula Radial tuberosity Musculocutaneous (C6,C7) Elbow flexion, Forearm supination
Brachioradialis Lateral supracondylar ridge on the humerus Styloid process of the radius Radial (C5,C6) Elbow flexion
Triceps Long head- Infraglenoid tubercle of scapula. Lateral head- Inferior to greater tubercle on posterior humerus. Medial head- Posterior surface of humerus. Olecranon process of ulna Radial (C7,C8) Elbow extension
Pronator Teres Medial epicondyle of humerus and coronoid process of ulna Lateral aspect of radius at its midpoint Median (C6,C7) Forearm pronation, assistive in elbow flexion
Pronator Quadratus Distal one-fourth of ulna Distal one-fourth of radius Median (C8,T1) Forearm pronation
Supinator Lateral epicondyle of humerus and adjacent ulna Anterior surface of the proximal radius Radial (C6) Forearm supination
Flexor Carpi Ulnaris Medial epicondyle of Humerus Pisiform and base of fifth metacarpal Ulnar (C8,T1) Wrist flexion, Ulnar deviation
Flexor Carpi Radialis Medial epicondyle of the humerus Base of second and third metacarpals Median (C6,C7) Wrist flexion, Radial deviation
Palmaris Longus Medial epicondyle of humerus Palmar fascia Median (C6,C7) Assistive in wrist flexion
Extensor Carpi Radialis Longus Supracondylar ridge of humerus Base of second metacarpal Radial (C6,C7) Wrist extension, Radial deviation
Extensor Carpi Radialis Brevis Lateral epicondyle of humerus Base of third metacarpal Radial (C6,C7) Wrist extension
Extensor Carpi Ulnaris Lateral epicondyle of humerus Base of fifth metacarpal Radial (C6,C7,C8) Wrist extension, Ulnar deviation
Flexor Digitorum Superficialis Common flexor tendon, coronoid process and radius Sides of the middle phalanx of the four fingers Median (C7,C8,T1) Flexes the MCP and PIP joints of the fingers
Flexor Digitorum Profundus Upper three-fourths of the ulna Distal phalanx of the four fingers Median and Ulna (C8,T1) Fleces all three joints of the fingers
Extensor Digitorum Lateral epicondyle of the humerus Base of distal phalanx of the second thur fifth fingers Radial (C6,C7,C8) Extends all three joints of the fingers
Extensor Indicis Disatl ulna Base of distal phalanx of the second finger Radial (C6,C7,C8) Extends all three joints of the second finger
Extensor Digits Minimi Lateral epicondyle of humerus Base of distal phalanx of fifth finger Radial (C6,C7,C8) Extends all three joints of fifth finger
Flexor Pollicis Radius, anterior surface Distal phalanx of thumb Median (C8,T1) Flexes all three joints of the thumb
Abductor Pollicis Longus Posterior radius, interosseous membrane, middle ulna Base of the first metacarpal Radial Abducts thumb
Extensor Pollicis Brevis Posterior distal radius Base of the proximal phalanx of thumb Radial (C6,C7) Extends CMC and MCP joints of thumb
Extensor Pollicis Longus Middle posterior ulna and interosseous membrane Base of distal phalanx of thumb Radial (C6,C7,C8) Extends all three joints of the thumb
Flexor Pollicis Brevis Trapezium and flexor retinaculum Proximal phalanx Median (C6,C7) Flexes the CMC and MCP joints of the thumb
Abductor Pollicis Brevis Scaphoid, trapezium and flexor retinaculum Proximal phalanx Medial (C6,C7) Abducts the thumb
Opponens Pollicis Trapezium and flexor retinaculum First metacarpal Median (C6,C7) Opposes the thumb
Adductor Pollicis Capitate, base of the second metacarpal, palmar surface of the third metacarpal Base of proximal phalanx of thumb Ulnar (C8,T1) Adducts thumb
Flexor Digiti Minimi Hamate and Flexor retinaculum Base of proximal phalanx of the fifth finger Ulnar (C8,T1) Flexes CMC and MCP joints of the fifth finger
Abductor Digiti Minimi Pisiform and tendon of flexor carpi ulnaris Proximal phalanx of the fifth finger Ulnar (C8,T1) Abducts the MCP joint of the fifth finger
Opponens Digiti Minimi Hamate and flexor retinaculum Fifth metacarpal Ulnar (C8,T1) Opposes the fifth finger
Dorsal Interossei Adjacent metacarpals Base of proximal phalanx Ulnar (C8,T1) Abduct fingers at MCP joint
Palmar Interossei Respective metacarpal Base of respective proximal phalanx Ulnar (C8,T1) Adduct fingers at MCP joint
Lumbrical Tendon of the flexor digitorum profundus muscle Tendon of the extensor digitorum muscle First and Second lumbricales: Medial. Third and fourth lumbricales: Ulnar (C6,C7,C8) Flex the MCP joint while extending the PIP and DIP joints
Upper Trapezius Occipital bone, nuchal ligament on cervical processed Outer third of clavicle, Acromion process CNXI, C3 & C4(S) Scapular elevation and upward rotation
Middle Trapezius Spinous processes of C7 Through T3 Scapular spine CNXI, C3 & C4(S) Scapular retraction
Lower Trapezius Spinous process of middle and lower thoracic vertebrae Base of scapular spine CNXI, C3 & C4(S) Scapular depression and upper rotation
Created by: RLPTA