Muscles of Facial Expression

The Epicranius includes

Frontalis belly & Occipitalis belly

Occipitalis belly

Covers the posterior skull

Occipitalis belly originates from

occipital and temporal bones

Occipitalis belly inserts into the

epicranial aponeurosis

The action that the Occipitalis belly does is it

pulls the scalp posteriorly

The Occipitalis belly muscle innervates

CN VII, posterior auricular branch

Frontalis belly

covers forehead and dome of skull

The frontalis belly originates from the

epicranial aponeurosis

The action the frontalis belly does is

Raises eyebrows (with aponeurosis fixed), wrinkles forehead

The frontalis belly innervates

CN VII, temporal branch

Frontalis belly of the epicranius

Occipital belly of the epicranius

Corrugator supercilii originates from the

arch of frontal bone, above nasal bones