Minute bundles of hair cells in the inner ear are entirely replaced every 48 hours, US research shows. The finding could explain the average two-day duration of temporary hearing loss caused by exposure to loud music or drilling.



The team studied the sensory component of the ear hair cells of rats – tiny bundles of microscopic antennae, called stereocilia. They discovered that the stereocilia were being continually regenerated from tip to base, and were totally replaced within two days.

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