hair cells in the Corti stiffen and die.

Changes in the inner ear, middle ear, and complex changes along the nerve pathways from the ear to the brain can also affect hearing. Long-term exposure to noise and some medical conditions can also play a role. In addition, new research suggests that certain genes make some people more susceptible to hearing loss as they age. Other risk factors include preexisting noise-induced hearing loss and exposure to ototoxic medications.

Pathophysiology

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