Aging changes in the senses

A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• R
• S
• T
• U
• V
• W
• X
• Y
• Z

Aged eye anatomy	Aging changes in hearing	Hearing aids
Sense of sight
Tongue

Aging changes in the senses are perceptual changes related to growing older.

When you age, the way your senses (taste, smell, touch, vision, and hearing) are able to give you information about the world changes. Your senses become less acute, and you may have trouble distinguishing details.

Sensory changes can have a tremendous impact on your lifestyle. You may have problems with communication, enjoyment of activities, and social interactions. Sensory changes can contribute to a sense of isolation.

All of the senses receive information of some type from the environment (light, sound vibrations, and so on). This is converted to a nerve impulse and carried to the brain, where it is interpreted into a meaningful sensation.

---

---

Everyone requires a certain minimum amount of stimulation before a sensation is perceived. This minimum level is called the threshold. Aging increases this threshold, so the amount of sensory input needed to be aware of the sensation becomes greater. Changes in the body part related to the sensation account for most of the other sensation changes.

Hearing and vision changes are the most dramatic, but all senses can be affected by aging. Fortunately, many of the aging changes in the senses can be compensated for with equipment such as glasses and hearing aids or by minor changes in lifestyle.

HEARING

Your ears have two jobs. One is hearing and the other is maintaining balance. Hearing occurs after vibrations cross the eardrum to the inner ear. They are changed into nerve impulses and carried to the brain by the auditory nerve.

Balance (equilibrium) is controlled in a portion of the inner ear. Fluid and small hairs in the semicircular canal (labyrinth) stimulate the nerve that helps the brain maintain balance.

As you age, your ear structures deteriorate. The eardrum often thickens and the bones of the middle ear and other structures are affected. It often becomes increasingly difficult to maintain balance.

Hearing may decline, especially that of high-frequency sounds, particularly in people who have been exposed to a lot of noise when younger. This age-related hearing loss is called presbycusis. Some hearing loss is almost inevitable. It is estimated that 30% of all people over 65 have significant hearing impairment.