Chat with AIExam 12: Ears
List the functions of the middle ear.
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VerifiedThe middle ear conducts sound vibrations from the outer ear to the central hearing apparatus in the inner ear and protects the inner ear by reducing the amplitude of loud sounds. The eustachian tube allows equalization of air pressure on each side of the tympanic membrane.
State the functions of the inner ear that can be assessed.
(79) VerifiedThe ear transmits sound and converts its vibrations into electrical impulses, which can be analyzed by the brain. The inner ear contains the bony labyrinths, which hold the sensory organs for equilibrium and hearing. Although the inner ear is not accessible to direct examination, its function can be assessed.
Differentiate among the types of hearing loss.
(72) VerifiedAnything that obstructs the transmission of sound impairs hearing. Hearing loss may be conductive, sensorineural, or mixed. Conductive hearing loss involves a mechanical dysfunction of the external or middle ear. If the sound amplitude is increased enough, the person is able to hear. Cerumen buildup and otosclerosis are two possible causes of this type of hearing loss. Sensorineural or perceptive hearing loss indicates a pathologic condition of cranial nerve VIII. Presbycusis, a gradual degeneration of the nerve that occurs with aging, may be the cause. When hearing loss is the result of both conductive and sensorineural causes, the loss is referred to as mixed.
Incorporate health promotion concepts when performing an assessment of the ears.
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