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Arm
BIO 201 Muscle Handout
Definition | |
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Origin: Acromion process and scapular spine, clavicle Insertion: Deltoid tuberosity of humerus Action: Abduct, extend, and flexes arm | Deltoid |
Origin: Coracoid process & tubercle above glenoid cavity of Scapula Insertion: Radial tuberosity Action: Flexes forearm & rotates hand laterally (supinate) | Biceps brachii |
Origin: Anterior shaft of humerus Insertion: Ulna (coronoid process) Action: Flexes the forearm | Brachialis |
Origin: Tubercle below glenoid cavity, lateral and medial surfaces of humerus Insertion: Ulna (olecranon process) Action: Extends the forearm | Triceps brachii |
Origin: Distal humerus Insertion: Styloid process of radius Action: Flexes the forearm | Brachioradialis |
Origin: Distal end of humerus Insertion: Base of 2nd metacarpal Action: Extends wrist/ abducts hand | Extensor carpi radialis longus |
Origin: Lateral epicondyle of humerus Insertion: Base of 2nd & 3rd metacarpals Action: Extends wrist/ abducts hand | Extensor carpi radialis brevis |
Origin: Lateral epicondyle of humerus Insertion: Posterior phalanges 2-5 Action: Extends the fingers | Extensor digitorum |
Origin: Lateral epicondyle of humerus Insertion: Base of 5th metacarpal Action: Extends and adducts hand at the wrist | Extensor carpi ulnaris |
Origin: Medial epicondyle of humerus Insertion: Fascia of palm Action: Flexes the wrist | Palmaris longus |
Origin: Medial epicondyle of humerus and olecranon process Insertion: carpal & metacarpal bones Action: Flexes & adducts hand at the wrist | Flexor carpi ulnaris |
Origin: Medial epicondyle of humerus Insertion: Tendons of fingers Action: Flexes the fingers | Flexor digitorum superficialis |
Origin: Medial epicondyle of humerus Insertion: Base of 2nd and 3rd metacarpals Action: Flexes wrist and abducts hand | Flexor carpi radialis |
Origin: Medial epicondyle of humerus Insertion: Lateral radius Action: Rotates arm medially | Pronator teres |
Origin: Lateral epicondyle of humerus Insertion: Lateral radius Action: Rotates arm laterally | Supinator |