4/16/2024 0 Comments Battle sign trauma![]() ![]() Ossicles - The ossicles (the malleus, the incus, and the stapes) comprise a lever system that amplifies sound by a factor of approximately 1.5. The ET is supported by bone then cartilage, and lined by mucosa, as it travels from the middle ear space into the nasopharynx. The pressure in the middle ear cavity is equilibrated to ambient pressure by the action of the tensor veli palatini muscle and the salpingopharyngeus muscle located at the orifice of the Eustachian tube (ET). The middle ear space is lined by vascularized, ciliated, pseudostratified, columnar respiratory mucosa. Meningitis days to years after the injury.Carotid artery aneurysm, or pseudoaneurysm.Cerebrospinal fluid (CSF) middle ear effusion, otorrhea, or rhinorrhea.Fractures of the temporal bone into these spaces may result in any of the following: The bony roof of these regions separates them from the middle cranial fossa, which is lined by dura the bony posterior aspect of the mastoid cavity contains the sigmoid sinus in the posterior cranial fossa. The posterior aspect of the middle ear space leads into the adjacent air space called the mastoid cavity ( figure 2) via the aditus ad antrum. ![]() The entrance to the mastoid cavity, called the aditus ad antrum, posteriorly ( figure 2). ![]()
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