What is tympanic bone?
Definition of tympanic bone : a bone of the skull of a mammal that encloses a part of the middle ear, supports the tympanic membrane, and is often fused with the temporal bone.
What is tympanic ring?
The tympanic ring is a bony circle that completely surrounds the tympanic membrane. In the concavity of the tympanic ring is a groove, the tympanic sulcus, for the attachment of the circumference of the tympanic membrane.
What is the function of the tympanic cavity?
The tympanic cavity is a small cavity surrounding the bones of the middle ear. Within it sit the ossicles, three small bones that transmit vibrations used in the detection of sound.
Why is temporal bone called temporal?
Etymology. Its exact etymology is unknown. It is thought to be from the Old French temporal meaning “earthly,” which is directly from the Latin tempus meaning “time, proper time or season.” Temporal bones are situated on the sides of the skull, where grey hairs usually appear early on.
Which features are found in the tympanic part of the temporal bone?
The tympanic part of the temporal bone is a relatively small part situated inferior to the squamous part, anterior to the mastoid part, and superior to the styloid process. The tympanic part features the petrotympanic fissure.
Where is tympanic part of temporal bone?
Tympanic. The tympanic part of the temporal bone lies inferiorly to the squamous, and anteriorly to the petromastoid part. It surrounds the external auditory opening, which leads into the external auditory meatus of the external ear.
What is Mesotympanum?
The mesotympanum (rare plural: mesotympana) forms the main compartment of the tympanic cavity and contains most of the important structures of the middle ear, including most of the ossicular chain.
What are the parts of tympanic membrane?
The tympanic membrane is comprised of three layers of tissue: the outer cutaneous layer, the fibrous middle layer, and a layer of mucous membrane on its innermost surface. The membrane is held in place by a thick ring of cartilage, a tough but flexible kind of tissue.
What are the parts of tympanic cavity?
The tympanic cavity consists of three parts: the epitympanic recess, which is an upper area above the level of the membrane; the mesotympanum, a middle area on a level with the membrane; and the hypotympanic recess, a lower area situated beneath the promontory and the membrane.
What does tympanic mean in medical terms?
tympanum
Tympanic: 1. Pertaining to the tympanum (the eardrum).
What are features of the temporal bone?
The temporal bone is a thick, hard bone that forms part of the side and base of the skull. This bone protects nerves and structures in the ear that control hearing and balance.