origin-lateral margin of humerus and tubercle of scapula, insertion-olecranon of ulna, action-extension at elbow and extension and adduction at the shoulder

origin-lateral supracondylar ridge of humerus, insertion-base of second metacarpal bone, action-extension and abduction at wrist

origin-lateral epicondyle of humerus, insertion: digits 2-5, action-extends digits 2-5

Origin-medial epicondyle of humerus, Insertion-Bases of second and third metacarpal bones, Actions-Flexion and abduction at wrist

origin-medial epicondyle of humerus, insertion-palmar aponeurosis, action-flexion at wrist

Origin-Medial epicondyle of the humerus, Insertion-5th metacarpal, Action-Flexion and adduction at wrist

O-one head from the coracoid process; the other from the supraglenoid tubercle, I-tuberosity of radius, A-flexion at elbow and shoulder; supination

flex metacarpophalangeal joints, extend interphalangeal joints

adduct fingers

abducts little finger

flexes little finger

moves skin on medial border toward midline of palm

adducts thumb

flexes thumb

opposition of thumb

abducts fingers

muscle fascicles where the origin of the fixed bone is wider than the point of insertion.

fascicles that run parallel to one another, and contraction of these muscle groups acts as an extension of the contraction of a single muscle fiber.

attaches muscle to bone