The middle ear or middle ear cavity, also known as tympanic cavity or tympanum (plural: tympanums/tympana), is an air-filled chamber in the petrous part of the temporal bone.

What does otic mean in Greek?

-otic. an adjective suffix of Greek origin, often corresponding to nouns ending in -osis, denoting a relationship to an action, process, state, or condition indicated by the preceding element: hypnotic; neurotic. See also -tic.

What is otic vesicle?

The otic vesicle is a transitory autonomous structure that contains all the information required to undergo the differentiation program and thus to generate most cell types of the adult inner ear (Bissonnette and Fekete, 1996; Sanchez-Calderon et al., 2007).

What is meatus of ear?

external auditory canal, also called external auditory meatus, or external acoustic meatus, passageway that leads from the outside of the head to the tympanic membrane, or eardrum membrane, of each ear. The structure of the external auditory canal is the same in all mammals.

What is the ear cavity called?

The tympanic cavity is an air-filled compartment surrounded by bone that is separated from the external ear by a thin tympanic membrane (tympanum) and is in direct communication with the pharynx via the auditory tube (also known as the eustachian or pharyngotympanic tube).

What is the function of otic capsule?

role in hearing

Within the otic capsule are the usual labyrinthine endings, including an auditory papilla. The auditory papilla lies in a path between the oval window and an opening (the round window) in the posterior wall of the otic capsule.

Which drops are used in otic cavity?

Vasocidin, an ophthalmic drop used off-label as an otic preparation, has an intense inflammatory effect on middle ear mucous membranes. Inner ear toxicity can take 2 forms, cochlear and vestibular. Neomycin, polymyxin, and chloramphenicol are intensely ototoxic if these agents enter the inner ear.

What is otic capsule sparing?

In otic capsule-sparing fractures, the CSF usually leaks through a fracture of the tegmen tympani or mastoideum into the epitympanum, antrum, and mastoid air cell tract. It can present as clear otorrhea if the tympanic membrane is disrupted or as rhinorrhea if the tympanic membrane is intact.

Is Otic a suffix?

an adjective suffix of Greek origin, often corresponding to nouns ending indenoting a relationship to an action, process, state, or condition indicated by the preceding element:See hypnotic; neurotic.

Where does the word otic come from?

Etymology. Mid 17th century borrowed from Ancient Greek ὠτῐκός (ōtikós, “of or for the ear”), from οὖς (oûs, “ear”) + -ῐκός (-ikós, “-ic”, adjectival suffix).

What is the suffix for ear?

oto- a combining form meaning “ear,” used in the formation of compound words: otology.

What is otic pit?

The auditory pit, also known as the otic pit, is the first rudiment of the internal ear. It appears shortly after that of the eye, in the form of a patch of thickened ectoderm, the auditory plate, over the region of the hind-brain. The auditory plate becomes depressed and converted into the auditory pit (or otic pit).

How is otic vesicle formed?

The inner ear and cochleovestibular ganglion (CVG) derive from a specialized region of head ectoderm termed the otic placode. During embryogenesis, the otic placode invaginates into the head to form the otic vesicle (OV), the primordium of the inner ear and CVG.

What is the endolymphatic duct?

The endolymphatic duct is a small epithelial-lined channel, part of the membranous labyrinth that passes through the vestibular aqueduct in the bony labyrinth of the petrous temporal bone. It arises from the utricle and saccule via the utriculosaccule duct and drains endolymph.

What is the function of the meatus?

Superior Meatus (Upper Conchae)

Functions of this passageway include: Drainage of two of the paranasal sinuses: the sphenoid and back (posterior) ethmoid sinuses. Like the middle meatus, airflow through this passageway (which interacts with sinus cavities) helps to modify our vocal features.

What is malleus?

ear bones. In ear bone. These are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup. Together they form a short chain that crosses the middle ear and transmits vibrations caused by sound waves from the eardrum membrane to the liquid of the inner ear.