The forehead comprises, and the musculature and skin of the forehead lies above, the portion of the frontal bone of the skull that is known as the squama frontalis, the plate-like portion of the frontal bone [REF].
The musculature of the forehead comprises the occipitofrontalis, procerus, and corrugator supercilii muscles, all of which are controlled by the temporal branch of the facial nerve [REF].