It is a site of attachment for many muscles, such as the sternocleidomastoid. Choose from 500 different sets of term:mastoid+process = attachment site for muscles flashcards on Quizlet. In addition to this the mastoid process of the temporal bone is a major site of muscle attachment. The temporal bone serves as a point of attachment for many muscles. Like the mastoid cells, it is filled with air and lined by a prolongation of the mucous membrane of the tympanic cavity, with which it communicates. Involved in movements such as shaking the head. Revisions: 38. It forms postnatally (starts to develop after 1 year old),[citation needed] as the sternocleidomastoid muscle develops and pulls on the bone. The outer facing surface of the squamous bone is convex in shape, forming part of the temporal fossa. Fig 1.1 – The constituent parts of the temporal bone. This point is known as the pterion. The middle meningeal artery (MMA) supplies the skull and the dura mater (the outer membranous layer covering the brain). In this article, we shall look at the different parts of the temporal bone, their articulations, and any clinical correlations. The tympanic antrum is bounded above by a thin plate of bone, the tegmen tympani, which separates it from the middle fossa of the base of the skull, below by the mastoid process, laterally by the squama just below the temporal line, and medially by the lateral semicircular canal of the internal ear, which projects into its cavity. Is our article missing some key information? The mastoid part has an outer rough surface that provides attachment to occipitalis and auricularis posterior muscles. We shall now examine the constituent parts of the temporal bone in more detail. On a lateral view of the temporal bone, such as figure 1.1 above, only the mastoid part is visible. Muscular Attachments. jaw bone) to form the temporomandibular joint which is covered in detail here. On the medial side of the process is a deep groove, the mastoid notch, for the attachment of the digastric muscle ; medial to this is a shallow furrow, the occipital groove , which lodges the occipital artery . The mastoid process itself can get infected, and this can spread to the middle cranial fossa, and into the brain, causing meningitis. Blood will then collect in between the dura mater and the skull, causing a dangerous increase in intra-cranial pressure. These two structures form the zygomatic arch (palpable as 'cheek bones'). When doing so, care must be taken not the damage the nearby facial nerve. It can be split into a mastoid and petrous parts.
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