Dementia and hearing loss — what’s the connection? Medical science has connected the dots between brain health and hearing loss. It was found that even minor untreated hearing impairment increases your risk of developing dementia.
Researchers believe that there might be a pathological link between these two seemingly unrelated health problems. So, how does hearing loss put you at risk for dementia and how can a hearing exam help fight it?
What is dementia?
The Mayo Clinic states dementia is a group of symptoms that change memory, alter the ability to think concisely, and reduce socialization skills. People tend to think of Alzheimer’s disease when they hear dementia probably because it is a common form. Alzheimer’s means progressive dementia that impacts around five million people in the U.S. Today, medical science has a complete understanding of how ear health alters the risk of dementias like Alzheimer’s disease.
How hearing works
The ear mechanisms are very complex and each one matters when it comes to good hearing. Waves of sound go into the ear canal and are amplified as they travel toward the inner ear. Inside the labyrinth of the inner ear, tiny hair cells vibrate in response to the waves to send electrical impulses that the brain decodes.
Over time, many people develop a gradual decline in their ability to hear due to years of trauma to these delicate hair cells. The result is a reduction in the electrical impulses to the brain that makes it harder to comprehend sound.
This gradual hearing loss is sometimes considered a normal and inconsequential part of the aging process, but research indicates that’s not accurate. The brain tries to decode any messages sent by the ear even if they are garbled or unclear. That effort puts stress on the organ, making the person struggling to hear more vulnerable to developing dementia.
Loss of hearing is a risk factor for many diseases that lead to:
- Impaired memory
- Inability to master new tasks
- Reduction in alertness
- Irritability
- Exhaustion
- Depression
- Overall diminished health
The odds of developing dementia can increase based on the extent of your hearing loss, too. A person with just a minor impairment has double the risk. The more advanced hearing loss means three times the risk and a person with severe, untreated loss of hearing has up to five times the risk of developing dementia. A study conducted by Johns Hopkins University monitored the cognitive skills of more than 2,000 older adults over a six-year period. They discovered that hearing loss advanced enough to interfere with conversation was 24 percent more likely to cause memory and cognitive problems.
Why a hearing exam matters
Not everyone understands how even a little hearing loss affects their overall health. For most, the decline is gradual so they don’t always realize there is a problem. The human brain likes to adapt as hearing declines, so it is less noticeable.
Scheduling regular comprehensive exams gives you and your hearing specialist the ability to properly assess hearing health and monitor any decline as it happens.
Reducing the risk with hearing aids
The current hypothesis is that stress on the brain from hearing loss plays a major role in cognitive decline and different kinds of dementia. Based on that one fact, you might conclude that hearing aids reduce that risk. A hearing assistance device amplifies sound while filtering out background noise that interferes with your hearing and eases the stress on your brain. With a hearing aid, the brain will not work as hard to understand the audio messages its receiving.
There is no rule that says individuals with normal hearing won’t develop dementia. What science believes is that hearing loss accelerates the decline in the brain, increasing the risk of cognitive problems. The key to reducing that risk is regular hearing exams to diagnose and treat gradual hearing loss before it can have an impact on brain health.
If you’re concerned that you may be suffering from hearing loss, find a provider near you to schedule your hearing exam.
