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origin- zygomatic arch and maxilla
insertion- angle and ramus of mandible
function- closes jaw, elevates mandible


origin- temporal lines
insertion- coronoid process of mandible
function- closes jaw, elevates and retracts mandible

lateral pterygoid

origin- greater wing of sphenoid, pterygoid processes
insertion- medial surface of mandible, near angle
function- elevates mandible, aids in grinding

medial pterygoid

origin- sphenoid, palatine, maxilla
insertion- mandibular condyle
function- protracts jaw foward, aids in grinding

pectoralis major

origin- clavicle, sternum, cartilage of first 6-7 ribs
insertion- intertubercular groove of humerus
function- arm flexion; adducts, medially rotates arm


origin- clavicle, acromion process, scapular spine
insertion- deltoid tuberosity of humerus
function- arm abduction

rectus abdominis

origin- pubic crest and symphysis
insertion- xiphoid process; costal cartilage of ribs 5-7
function- flexes and rotates vertebral column


origin- occipital bone, spines of c7 and all thoracic vertebrae
insertion- acromion and spinous processes of scapula, lateral 3rd of clavicle
function- extends head; raises, roates, adducts acapula; elevation and depression of scapula

latissimus dorsi

origin- indirect attachment to lower six thoracic vertebra, all lumbar vertebrae, iliac crest, lower 3-4 ribs
insertion- intertubercular groove of humerus
function- arm extension and adduction; medially roates arm; depresses scapula; brings arm down in power stroke

biceps brachii

origin- coracoid process; supraglenoid tubercle and glenoid lip
insertion- radial tuberosity
function- forearm flexor

triceps brachii

origin- infraglenoid tubercle, posterior humeral shaft
insertion- olecranon process
function- forearm extensor

adductor longus

origin- pubis near pubic symphysis
insertion- linea aspera
function- adducts and rotates thigh

rectus femoris (part of quadriceps)

origin- anterior ingerior iliac spinel superior margin of acetabulum
insertion- patella and tibial tuberosity via patella ligament
function- extends knee, flexes thigh at hip

semitendinosus (part of hamstrings)

origin- ischial tuberosity
insertion- upper medial tibial shaft
function- extends thigh at hip, flexes knee; medially rotates leg

gluteus maximus

origin- dorsal ilium, sacrum, coccyx
insertion- gluteal tuberosity, iliotibial tract
function- thigh extensor; lateral rotation, abduction of thigh

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