FLEXION 

Origin: Alveolar processes of maxilla and mandible, TMJ 

Insertion: Orbicularis Oris 

Action: suckling, blowing, mastication

Origin: Supraorbital ridge on frontal bone 

Insertion: forehead skin 

Action: Wrinkles Forehead 

Leg

Action: Plantar flexion of the foot 

Leg 

Extends and inverts foot at the ankle. Helps hold up foot arches 

Neck 

Depresses and wrinkles skin of lower face and mouth, depresses mandible

back 

extends and rotates c-spine

Hand 

Deep fascia of the hand that connects fascia of other muscle of the hand

Head 

Elevates and retracts mandible 

abdomen 

fixes intercostals spaces, accessory to inspiration

Hip 

Flexes and laterally rotates legs at hip

abdomen

runs between the xiphoid process and pubic symphysis; midline aponeurosis of several abdominal muscles (dense regular Ct)

Abdomen 

Elevates cribs or protract scapula 

Hand 

Medially rotates the arm 

Back 

include: Spinalis, Iliocostalis, Longissimus 

Flexion and Extension of Spine

Back 

Diamond shaped, run the back of the neck 

Laterally rotates, elevates and retracts the scapula 

Laterally flexes neck 

Abdomen 

supports abdominal wall, the accessory for inspiration, abducts and rotates trunk 

Back 

Retracts Scapula 

Abdomen

Support viscera in pelvic cavity

Legs 

Maintains knee extension and abduct hip

Legs 

Adduct and medially rotates the hip

Legs 

extends and laterally rotates hip

Hands 

Flexes and Adducts wrist

Hands 

Flexes elbow 

Face 

Elevates and evert upper lip