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Buccinator
Origin: Maxilla and mandible
Insertion: Orbicularis oris
Action: Compresses cheeks
Pectoralis Major
Origin: Clavicle, sternum and costal cartilage of the upper ribs
Insertion: Greater tubercle
Action: Flexes shoulder and aDducts the humerus
Trapezius
Origin: Occipital bone, spinous process of C7 and all thoracic vertebrae.
Insertion: Acromial extremity of clavicle, scapular spine
Action: Elevates and aDducts scapula
Sternocleidomastoid
Origin: Clavicle
Insertion: Mastoid process
Action: Flexes shoulder and neck,head and shoulders
Massater
Origin: Zygomatic arch
Insertion: Mandible
Action: Elevates mandible
Adductor longus
Origin: Pubis
Insertion: Posterior femur
Action: Adduction
Biceps femoris
Origin: Ischial tuberosity, femur
Insertion: Fibular head
Action: Flexes knee, extend hip
Deltoid
Origin: Acromion and scapular spine
Insertion: Deltoid tuberosity of humerus
Action: ABducts the humerus
Triceps branchii
Origin: Scapula and humerus
Insertion: Olecranon process of ulnar
Action: Extends elbow
Biceps branchii
Origin: Coracoid process and supra glenoid tubercle
Insertion: Radial tuberosity
Action: Flexes elbow, supinates hand and wrist
Supination
Origin: Lateral epicondyle of humerus, proximal ulna
Insertion: Proximal radius
Action: Supinates forearm
