Epicranus (Occipitofrontalis, Temporoparietalis)
A tendinous plate (Galea Aponeruotica) stretches over the skull and serves as the attachment site for muscles radiating from the forehead, temple, and occiput (occipitofrontalis, temporoparietalis), which together are referred to as the epicranius. The frontalis raises the eyebrows and "wrinkles" the forehead. The occipitalis "smooths" the forehead. The facial nerve innervates the epicranius.Lacerations of the head region gape only mildly if the galea is not involved. If the galea is completely severed there is wide gaping. Hemorrhages and effusions below the galea spread extensively into the subaponeurotic space.