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Structures of the Ear
Structures of the Ear
Outer Ear-Consist of the pinna, ear canal, and eardrum.
Pars Tensa-Fibrous portion of the eardrum.
Middle Ear-A small air-filled cavity in the temporal bone lined by epithelium.
Tympanic Antrum-Opening into the mastoid sinus.
Eustachian Tube-Connects the middle ear to the nasopharynx.
Malleus-Attaches to the internal surface of the eardrum.
Incus-Attaches to the head of the stapes.c
Stapes-Fits into the oval window.
Inner Ear-Consist of the semicircular canal, vestibule, and cochlea.
Bony Labyrinth-Series of cavities in the temporal bone.
Semicircular Canal-Located superiorly and posteriorly from the vestibule.
Ampulla-A swollen enlargement at the base of the canals containing sensitive hair cells, which controls equilibrium.
Vestibule- A oval central portion of the bony labyrinth that separates the semicircular canals and the cochlea.
Cochlea-A bony spiral canal in front of the vestibule.
Organs of Corti-A coiled sheet of epithelial cells, including supporting cells and hair cells for hearing.
Mastoid process-
It serves as an attachment point for neck muscles.
Regulates pressure in the ear.
Bony projection of the temporal bone and posterior to the ears on each side.
Lateral to the styloid process.
Cholesteatoma
Cholesteatoma
A benign cyst or tumor that forms behind or from the eardrum.
Otosclerosis
Otosclerosis
Abnormal hypertrophy of the stapes bone.
Otitis Media
Otitis Media
Infection of the middle ear and is also known as a ear infection.
Myringotomy
Myringotomy
Surgica opening into the tympanic membrane and the use of PE tubes.
Tympanoplasty
Tympanoplasty
Surgical repair of the tympanic membrane and the use of autografts.
Mastoidectomy
Mastoidectomy
Surgical removal of mastoid air cells due to infection and damage.
Stapedectomy
Stapedectomy
Surgical removal of part of the stapes bone to treat otosclerosis.
Cochlear Implant
Cochlear Implant
A small complex electronic device used to aid in sensorineural deafness.
Resource list
Frey, K. B. (2018). Surgical Technology For The Surgical Technologist (5th ed.). Cengage Learning.
Tortora, G. J., & Derrickson, B. (2006). Principles Of Anatomy And Physiology (11th ed.). John Wiley & Sons INC
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