Musculus occipitofrontalis

Musculus occipitofrontalis is a muscle covering the cranial vault. It consists of two parts – the ventral part, which we call the frontalis muscle; from the dorsal part, which we call m. occipitalis. Together with m. temporoparietalis it forms m. epicranius.

Musculus frontalis (venter frontalis m. occipitofrontalis)
Origin: subcutaneous tissue and skin in glabella and eyebrow area; edges m. procerus, m. orbicularis oculi.

Insertion: galea aponeurotica.

Innervation: n. facialis.

Function:
 * pulls the skin of the forehead cranially;
 * helps lift the upper lid (attention, wonder);
 * conditions horizontal forehead wrinkles.

Musculus occipitalis (venter occipitalis m. occipitofrontalis)
Origin: os occipitale – linea nuchalis suprema.

Insertion: galea aponeurotica.

Innervation: n. facialis.

Function:
 * Moves galeu aponeuroticu posteriorly;
 * helps pull the venter frontalis behind the upper lid + is its antagonist.