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 Life of the World to Come day, a man shows up in a Company Time Shuttle. These previously unknown vessels let the Company ship tourists back to the past, but can only be piloted by cyborgs. Nonetheless the man is the image of her two previous lovers, and she does unto him what she did unto them. This time, however, he leaves behind genetic material when he goes back to the future. She is able to learn from this that he is no more human than she, but in a different way. His name is Alec Checkerfield. Next we learn about "Smart Alec", precocious scion of