How outer hair cells in the ear boost sounds
Mechanisms of amplification and nonlinearity in the mouse cochlea
This project looks at how tiny outer hair cells in the ear amplify sound to help people with hearing loss.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | University of Southern California NIH-funded |
| Lab location | 1 site (Los Angeles, UNITED STATES) |
| Project ID | NIH-11237100 on NIH RePORTER |
What this research studies
Researchers will use high-resolution imaging in mice to measure tiny vibrations and length changes of outer hair cells inside the cochlea. They will record both very fast, cycle-by-cycle movements and slower, sustained (tonic) length changes to see which motions actually add amplification across different sound frequencies. The team will use optical coherence tomography to make these in vivo measurements in the mouse cochlea. Although done in animals, the work focuses on mechanisms that underlie common forms of human sensorineural hearing loss and could guide future rehabilitation or restoration approaches.
Who could benefit from this research
Good fit: People with sensorineural hearing loss likely caused by damage to outer hair cells would be the most relevant group to follow this work or join related future trials.
Not a fit: People whose hearing loss is due to middle-ear (conductive) problems, auditory nerve damage, or unrelated genetic conditions may not benefit from these findings.
Why it matters
Potential benefit: If successful, this work could point to new strategies to restore or improve hearing for people with outer hair cell damage.
How similar studies have performed: Previous animal and lab studies support the idea that outer hair cells can boost sound, but directly measuring both fast and slow hair cell motions in living cochleas across frequencies is relatively new.
Where this research is happening
Los Angeles, UNITED STATES
- University of Southern California — Los Angeles, United States (Active)
Researchers
- Principal investigator: Dewey, James Braden — University of Southern California
- Study coordinator: Dewey, James Braden
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page below.