A&P Muscle Project

superior muscles

Frontalis= raises eyebrows

Frontalis

• insertion= eyebrow
• origin= frontal bone

orbicularis oculi= helps blink and wink

orbicularis oculi

• insertion= frontal bone
• origin= eyelids

obicularis oris= helps "pucker" the lips and close mouth

orbicularis oris

• insertion=lips
• origin= mandible and maxilla

platysma= pulls corner of mouth into a frown

platysma

• insertion= lower lip
• origin= fascia

deltoid= flexes the shoulder

Deltoid

• insertion= humerus
• origin= clavicle and scapula

latissimus dorsi= abducts, extends, and internally rotates the arm

latissimus Dorsi

• insertion= humerus
• origin= the vertebrae

pectoralis major= contributes to flexion and adduction of the arm

pectoralis major

• insertion= humerus
• origin= clavicular head

rectus abdominis= helps flex the lumbar spine

Rectus abdominis

• insertion= ribs, xiphoid process
• origin= pubis

extensor digitorum longus= helps flex the toes

extensor digitorum longus

• insertion= toes
• origin= tibia and fibula

biceps brachii= flexes elbow and abducts shoulder

BIceps brachii

• insertion= radius
• origin= humerus

triceps brachii= extends forearm and shoulder

triceps brachii

• insertion= ulna
• origin= scapula

brachialis= flexes the elbow

brachialis

• insertion= ulna
• origin= humerus

brachioradialis= helps with soupination and flexion of elbow

brachioradialis

• insertion= radius
• origin= humerus

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