Masseter muscle is partly concealed, anteriorly, by the superficial portion. Posteriorly, it is covered by the parotid gland. Along with the other three muscles of mastication (temporalis, medial pterygoid, and lateral pterygoid), the masseter is innervated by the anterior division of the mandibular division (V3) of the trigeminal nerve. The innervation pathway is: gyrus precentralis > genu capsula interna > nucleus motorius nervi trigemini > nervus trigeminus > nervus mandibularis > musculus masseter. The action of the muscle during bilateral contraction of the entire muscle is to elevate the mandible, raising the lower jaw. Elevation of the mandible occurs during the closing
The Name of the Rose fifty-six rooms. Each room has a scroll containing a verse from the Book of Revelation. The first letter of the verse is the letter corresponding to that room. The letters of adjacent rooms, read together, give the name of a region (e.g. Hibernia in the West tower), and those rooms contain books from that region. The geographical regions are: Two rooms have no lettering - the easternmost room, which has an altar, and the central room on the south tower, the so-called "finis Africae," which contains the most heavily guarded books, and can only be entered through a secret door.