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Hair Cells

Hair Cells

Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.

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Related Experiment Video

Updated: Oct 1, 2025

Patch Clamp Recordings in Inner Ear Hair Cells Isolated from Zebrafish

Patch Clamp Recordings in Inner Ear Hair Cells Isolated from Zebrafish

Published on: October 17, 2012

Noise-induced hearing loss correlates with inner ear hair cell decrease in larval zebrafish.

Rafael A Lara^1,2, Lukas Breitzler¹, Ieng Hou Lau¹

¹Institute of Science and Environment, University of Saint Joseph, Macao S.A.R., China.

The Journal of Experimental Biology

|March 8, 2022

Summary

This summary is machine-generated.

Chronic noise exposure harms larval zebrafish hearing and inner ear development. This study reveals noise-induced changes in auditory sensitivity and sensorimotor responses in young fish.

Keywords:

Auditory threshold shifts Hypersensitization Noise pollution Prepulse inhibition Saccule

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Area of Science:

Auditory Neuroscience
Developmental Biology
Environmental Toxicology

Background:

Anthropogenic noise is a global pollutant impacting animal auditory systems.
Little is known about noise effects on auditory function during early development.
Zebrafish (Danio rerio) are a key model for vertebrate inner ear development and hearing research.

Purpose of the Study:

To investigate the effects of chronic white noise exposure on larval zebrafish inner ear function and morphology.
To assess noise impacts on auditory-evoked sensorimotor responses in early development.
To understand the relationship between structural and functional changes in the developing auditory system due to noise pollution.

Main Methods:

Larval zebrafish were chronically exposed to white noise.
Saccular sensitivity and morphology were measured at 3 and 5 days post-fertilization (dpf).
Auditory-evoked swimming responses were assessed using the prepulse inhibition (PPI) paradigm at 5 dpf.

Main Results:

Noise-exposed larvae showed elevated microphonic potential thresholds at low frequencies (100, 200 Hz).
The PPI paradigm indicated hypersensitization and a threshold shift at 200 Hz in noise-exposed fish.
Auditory changes correlated with reduced saccular hair cell numbers and smaller epithelium area.

Conclusions:

Chronic noise exposure negatively impacts inner ear structure and function in larval zebrafish.
Noise pollution affects auditory sensitivity and sensorimotor responses during early development.
These findings underscore the need to study environmental noise impacts on developing sensory systems and behavioral responses to sound.