Lecture:muscles that cross the elbow

Origin: long head: infraglenoid tubercle of scapula; lateral head: posterior shaft of humerus; medial head: posterior humeral shaft distal to radial groove

Insertion: by common tendon into the olecranon process of ulna

• Action: POWERFUL FOREARM EXTENSOR
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Origin: lateral epicondyle of humerus

Insertion: lateral aspect of olecranon process of ulna

• Action: controls ulnar abduction during forarm pronation
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Origin: short hea: coracoid process; long head: supragelnoid cavity; tendon of long head runs within capsule and into intertubercular sulcus of humerus

Insertion: by common tendon into radial tuberosity

• ACTION: flexes elbow joint and supinates forearm
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origin: front of distal humerus; embraces insertion of deltoid muscle

• insertion: coronoid process of ulna and capsule of elbow joint
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• action: MAJOR FOREARM FLEXOR

Origin: lateral supracondylar ridge at distal end of humerus

Insertion: base of styloid process of radius

• action: synergist in forearm flexion
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