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Arm

BIO 201 Muscle Handout

Definition
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
Created by: rolyatstrebor
 

 



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