where is mastoid process
mastoid process, the irregular conic projection of the caudal, posterior part of the temporal bone, serving as the attachment for various muscles, including the sternocleidomastoideus, splenius capitis, and longissimus capitis.astoid process, the irregular conic projection of the caudal, posterior part of the temporal bone, serving as the attachment for various muscles, including the sternocleidomastoideus, splenius capitis, and longissimus capitis.