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| External structure located on both sides of the head. The auricle directs sound waves into the external auditory meatus. |
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| External Auditory Meatus (canal) |
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Definition
| Short tube that ends at the tympanic membrane. The inner part lies within the temporal bone of the skull and contains the glands that secrete earwax (cerumen). |
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| Tympanic Membrane (eardrum) |
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Definition
| Semitransparent membrane that separates the external auditory meatus and the middle ear cavity. The typmanic membrane transmits sound vibrations to the ossicles. |
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| Connects the middle ear and the pharynx. It equalizes air pressure on both sides of the eardrum. |
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| Bones of the middle ear that carry sound vibrations. The ossicles are composed of the malleus (hammer), incus(anvil), and stapes (stirrup). The stapes connects to the oval window, which transmits the sound vibrations to the cochlea of the inner ear. |
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| Bony spaces within the temporal bone of the skull. It contains the cochlea, semicircular canals, and vestibule. |
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| Snail-shaped, contains the organ of hearing. The cochlea connects to the oval window in the middle ear. |
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| Semicircular Canals and Vestibule |
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Definition
| Contains receptors and endolymph that help the body maintain its sense of balance (equilibrium). |
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| Tympanic membrane (eardrum) |
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| Any of various bodily cavities leading to another cavity. |
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| Inflammation of the labryinth (inner ear); also called vestibular neuritis. |
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Definition
| Discharge from the ear; may be serous, bloody, consisting of pus, or containing cerebrospinal fluid. |
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Definition
| Hardening of the ear (stapes), caused by irregular bone development and resulting in hearing loss. |
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Definition
| Inflammation of the middle ear (also called otitis media). |
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| Benign tumor within the auditory canal growing from the acoustic nerve (cranial nerve VIII, vestibulocochlear nerve); may cause hearing loss and may damage structures of the cerebellum as it grows. |
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| Chronic disease of the inner ear characterized by dizziness, ringing in the ear, and hearing loss. |
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Definition
| Inflammation of the middle ear. |
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May indicate inner ear disease, 2 Types:
Subjective Vertigo- a sense that one's own body is revolving
Objective Vertigo- a sense that the environment is revolving. |
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Definition
| Pertaining to the cochlea implant (surgically inserted prosthetic device that uses electrical currents to stimulate the auditory nerve and provide hearing). |
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Definition
| Incision into the tympanic membrane (performed to release pus or fluid and relieve pressure in the middle ear); also called tympanocentesis |
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Definition
| Excision of the stapes (performed to restore hearing n cases of otosclerosis; the stapes is replaced by a prosthessis) |
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| Surgical repair (of the hearing mechanism) of the middle ear (including the tympanic membrane and the ossicles). |
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| Physician who studies and treats diseases of the ear, nose, and larynx. Also called otolaryngologist. |
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| Eyes, Ears, Nose, and Throat |
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