Muscles Crossing the Elbow Joint

Anterior Muscle

1. Biceps Brachii (Long head) 2. Brachialis 3. Brachioradialis

Triceps Brachii "3 heads arm"

1. Long Head 2. Lateral head 3. Medial Head Location: > Posterior Muscles of arm Action: > Forearm extensor Origin: > Long Head -- Infraglenoid tubercle of scapula > Lateral Head -- posterior shaft of humerus > Medial Head -- Posterior shaft of humerus distal groove Insertion: > By common tendon into olecranon of Ulna

Biceps brachii Origin

Coracoid Process

Muscles Crossing the Elbow Joint

Muscles Crossing the Elbow Joint "Flexion & Extension of the forearm"

Biceps brachii Insertion

Tendon of radial tuberosity

Brachialis

Location: > Deep to Biceps Brachii on distal Humerus Action: > Flexes forearm Origin: > Anterior surface of distal humerus; embraces insertion of deltoid muscle Insertion: > Coronoid process of Ulna & Capsule of elbow joint

Brachioradialis

Location: > Superficial muscle of Lateral forearm Action: > Synergists in forearm flexion Origin: > Lateral Subcondylar at distal end of humerus Insertion: > Base of styloid process of radius

Biceps Brachii

Location: >Superficial Anterior Arm > Short--Medial anterior > Long-- Lateral anterior Action: >Flexes and supinates forearm Origin: > Short Head: Coracoid Process (Scapula) > Long Head: Supraglenoid tubercle & lip of glenoid cavity (Scapula) >Tendon of long head runs within capsule of shoulder joint & descends into intertubercle sulcus of humerus Insertion: > By common tendon of radial tuberosity