Muscles PDF

Dr_Ke3y Dr_Ke3y Muscles of shoulder region: Muscle Orgin Insertion Nerve Action The L...

Dr_Ke3y Dr_Ke3y Muscles of shoulder region: Muscle Orgin Insertion Nerve Action The Lateral one Anterior fibers: Flexion, medial rotate third of clavicle, The Deltoid Axillary nerve Deltoid Acromion, The tuberosity (C5,6) Middle fibers: abduct the arm 15-90 Posterior fibers: Extension, lateral rotation inferior lip of spine The Tip of the Suprascapular Supraspinatus Supraspinatus fossa Greater tubercle nerve (C5,6) Abduction the arm 0-15 Medial Facet of the Suprascapular Infraspinatus Infraspinatus fossa Greater tubercle nerve (C5,6) Lateral rotation of the arm Upper and lower Subscapularis Subscapularis fossa Lesser tubercle Subscapular nerve Medial rotation of the arm Upper two thirds of The inferior facet Axillary Nerve Teres Minor the lateral border of the greater (C5,6) Lateral rotation of the arm of scapula tubercle Lower third of the The medial lip of Lower subscapular Extension, adduction &medial rotation of the Teres Major lateral border bicipital groove Nerve (C5,6,7) arm of scapula Muscles of back region: Muscle Orgin Insertion Nerve Action -Lateral one third -Elevate the shoulder &rotate the scapula Eternal occipital of the Clavicle upwards protuberance, Medial -Medial border of -Retract the scapula &raise the arm above Trapezius third of the nuchal the acromion Accessory Nerve the head line &spines of -Medial part of the -Depress the scapula and shoulder &raise C7&T1-T12 spine of scapula the arm above the head Back of medial Levator border of scapula Dorsal scapular Processes of C1-C4 Elevates the medial border of the scapula scapula from superior angle nerve (C5) to the root Back of medial Rhomboideus Dorsal scapular Raises the medial border of the scapula Spines of C7-T1 border of scapula minor opposite the root nerve (C5) upwards and medially Back of medial Rhomboideus border of scapula Dorsal scapular Spines of T2-T5 Rotate the scapula upwards and medially major from the root to nerve (C5) the inferior angle  Dr_Ke3y Dr_Ke3y Muscles of Pectoral region: Muscle Orgin Insertion Nerve Action Head of medial two Pectoralis Lateral Lip of Medial and lateral flexion, adduction &medial rotation of the thirds of clavicle major &Sternocostal head 6 bicepital groove pectoral nerve arm Pectoralis Medial Pectoral Elevation of ribs, Depression &Protraction 3,4,5 Ribs Coracoid Process minor nerve of the scapula Pulls the clavicle medially to stabilize Subclavius 1st Rib Subclavian groove Nerve to subclavius sternoclavicular joint Medial border of Long thoracic nerve Depression,protraction &rotation of scapula Serratus Upper 8 Ribs scapula (C5,6,7) upwards Muscles of the arm: Muscle Orgin Insertion Nerve Action Middle of the medial Musculocutaneous Coracobrachialis Tip of coracoid process. border of humerus. nerve. Flexes the arm. Front of the lower half of Musculocutaneous Flexes the forearm at the Brachialis humerus. Tuberosity of the ulna. &Radial nerve. elbow joint. -The radial Tuberosity. -Long head from supraglenoid -Bicipital aponeurosis -Flexor of the forearm. tubercle. Musculocutaneous Biceps -Short head from tip of into deep fascia of the nerve. -Supinator of the forearm. medial side of the -Flex shoulder joint. Coracoid process. forearm. -Long head from infraglenoid tubercle. -Extension of elbow joint. -Lateral head from oblique -Adducts the arm and Summit of olecranon Triceps ridge on the back of humerus. process of ulna. Radial nerve. supports the head of the -Medial head from posterior humerus from below in surface of humerus below abducted arm. spiral groove.  Dr_Ke3y Dr_Ke3y Superficial Muscles in front of forearm: Muscle Orgin Insertion Nerve Action -Humeral head from the Oval rough area on the common flexor origin and Pronator lateral surface of the -Flexes the elbow. supraepicondylar ridge. Median nerve. teres -Ulnar head from medial side of radius midway along the -Pronation of the forearm bone. coronoid process. Flexor carpi Base of the 2nd and 3rd -Powerful flexor of the wrist. Common flexor origin. Median nerve. radialis metacarpals. -Abductor of the wrist. Palmaris -The flexor retinaculum. Common flexor origin. Median nerve. Flexor of the wrist. longus -Palmar aponeurosis. -Humeral head from the Flexor carpi common flexor origin. The pisiform bone of the -Flexor of the wrist. Ulnar nerve. ulnaris -Ulnar head from the olecranon wrist. -Adductor of the wrist. and posterior border of the ulna. Intermediate& deep Muscles in front of forearm: Muscle Orgin Insertion Nerve Action -Humeroulnar head from medial epicondyle of the humerus & -Flexes the metacarpophalangeal Flexor -The middle medial edge of the coronoid and proximal interphalangeal joints digitorum process. phalanges of medial Median nerve. of each finger. 4 fingers. superficialis -Radial head from the anterior -Flexes the wrist joint. oblique line of the radius. -Flexes the metacarpophalangeal -The upper ¾ of the anterior and Flexor -The terminal Anterior joints and the proximal and distal medial sides of the ulna. digitorum -Half of the anterior interosseous phalanges of the interosseous & interphalangeal joints of the medial medial 4 fingers. ulnar nerves.. 4 fingers. profundus membrane. -Flexes the wrist joint. -Middle ½ of anterior surface of -Flexes interphalangeal joint of the Palmar surface of Anterior Flexor radius. thumb. base of distal interosseous pollicis longus -Radial half of interosseous phalanx of thumb. nerve. -Flexes metacarpo phalangeal joint membrane. of the thumb. Distal part of Anterior Pronator -Linear ridge on distal part of anterior surface of interosseous -Pronation quadratus anterior surface of ulna. radius. nerve.  Dr_Ke3y Dr_Ke3y Superficial Muscles in back of the forearm: Muscle Orgin Insertion Nerve Action Upper 2 third of lateral Base of styloid process of Radial nerve Accessory flexor of elbow joint Brachioradialis supracondylar ridge of radius. before division. when forearm is mid pronated. humerus. -Distal part of lateral supraepicondylar ridge of Extensor carpi Dorsal surface of base Radial nerve humerus. Extends and abducts the wrist. radialis longus -Adjacent intermuscular of 2nd metacarpal bone. before division. septum. -common extensor origin. Dorsal surface of base of Extensor carpi Deep branch of -Adjacent intermuscular 2nd and 3rd Extends and abducts the wrist. radialis brevis septum. metacarpals bones. radial nerve. Dorsal bases of the -common extensor origin. Posterior Extensor middle and distal -Extends the 4 fingers. -Adjacent intermuscular interosseous digitorum septum. phalanges of the 4 nerve. -Extend the wrist joint. fingers. -common extensor origin. Posterior Extensor digiti Extensor expansion of -Adjacent intermuscular interosseous Extends the little finger. minimi septum. little finger. nerve. Posterior Extensor carpi -common extensor origin. Base of 5th metacarpal -Extends the wrist joint. interosseous ulnaris -Posterior border of ulna. bone. nerve. -Adducts the wrist joint. -Abduction of the ulna in -Back of olecranon. Back of the lateral pronation. Anconeus epicondyle of humerus. -Upper part of posterior Radial nerve. -Accessory extensor of the surface of ulna. elbow joint.  Dr_Ke3y Dr_Ke3y Deep Muscles in back of the forearm: Muscle Orgin Insertion Nerve Action -Superficial part: lateral epicondyle Posterior of humerus. Lateral surface of Supinator -Deep part: Supinator crest of the radius. interosseous Supination of the forearm. nerve. ulna. -Posterior surfaces of ulna and Lateral side of base Posterior -Abducts carpometacarpal joint Abductor radius. of 1st metacarpal interosseous of thumb. pollicis longus -Intervening interosseous membrane. bone. nerve. -Accessory extensor of the thumb. -Posterior surface of radius (distal to Posterior Extends metacarpophalangeal & Extensor Proximal phalanx of abductor pollicis longus). interosseous carpometacarpal joints of the pollicis brevis -Adjacent interosseous membrane. thumb. nerve. thumb. Extend interphalangeal, -Posterior surface of ulna (distal to Posterior Extensor Distal phalanx of carpometacarpal & abductor pollicis longus). interosseous pollicis longus -Adjacent interosseous membrane. thumb. nerve. metacarpophalangeal joints of the thumb. -Posterior surface of ulna (distal to Posterior Extensor Extensor expansion extensor pollicis longus). interosseous Extends index finger. indices -Adjacent interosseous membrane. of index finger. nerve.