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Latissimus dorsi
Origin: Thoracic & lumbar vertebra, sacrum & Iliac crest
Insertion: Humerus
Action: Shoulder adduction, extension, and internal rotation.
Pectoralis major
Origin: Medial clavicle & sternum
Insertion: Humerus
Action: Shoulder adduction, flexion, and internal rotation.
Coracobrachialis
Origin: Coracoid process
Insertion: Humerus
Action: shoulder Flexion
Supraspinatus
Origin: supraspinous fossa
Insertion: humerus
Action: shoulder medial rotation and abduction
Infraspinatus
Origin: infraspinous fossa
Insertion: humerus
Action: shoulder abduction and external rotation.
Subscapularis
Origin: subscapular fossa
Insertion: humerus
Action: shoulder medial rotation
Teres minor
Origin: lateral/axillary border (scapula)
Insertion: humerus
Action: shoulder external/lateral rotation
Teres major (little helper to latissimus dorsi)
Origin: n/a
Insertion: n/a
Action: shoulder lateral/external rotation
Deltoid
Origin: lateral clavicle, acromion, and spine of scapula
Insertion: deltoid tuberosity
Action: shoulder abduction, anterior: flexion & medial rotation, posterior: extension & lateral rotation
Triceps brachii (lateral head)
Origin: lateral humerus
Insertion: olecranon process
Action: extension of elbow
Triceps brachii (medial head)
Origin: medial humerus
Insertion: olecranon process
Action: extension of elbow
Triceps brachii (long head)
Origin: scapula
Insertion: olecranon process
Action: extension of elbow, extends shoulder
Biceps brachii (short head)
Origin: coracoid process
Insertion: radial tuberosity
Action: flexion of shoulder, flexion of elbow
Biceps brachii (long head)
Origin: scapula
Insertion: radial tuberosity
Action: flexion of shoulder, flexion of elbow
Brachialis
Origin: n/a
Insertion: n/a
Action: flexion of elbow
Brachioradialis
Origin: n/a
Insertion: n/a
Action: flexion of elbow
Pronator teres
Origin: n/a
Insertion: n/a
Action: pronates elbow
flexor carpi radialis
Origin: n/a
Insertion: n/a
Action: flexion & abduction of wrist
flexor carpi ulnaris
Origin: n/a
Insertion: n/a
Action: flexion & adduction of wrist
Palmaris longus
Origin: n/a
Insertion: n/a
Action: flexion of wrist
Extensor digitorium
Origin: n/a
Insertion: n/a
Action: extension of wrist
Extensor carpi radialis longus
Origin: n/a
Insertion: n/a
Action: extension & abduction at wrist
Extensor carpi radialis brevis
Origin: n/a
Insertion: n/a
Action: extension & abduction at wrist
Extensor carpi ulnaris
Origin: n/a
Insertion: n/a
Action: extension & adduction at wrist