How nerves protect the inner ear from loud noise
Neuronal control of cochlear stress responses
['FUNDING_R01'] · HARVARD MEDICAL SCHOOL · NIH-11300949
This research looks at how specific nerve circuits help protect the inner ear from loud sounds and stress, which could matter for people at risk of noise-related hearing loss.
Quick facts
| Phase | ['FUNDING_R01'] |
|---|---|
| Study type | Nih_funding |
| Sex | All |
| Sponsor | HARVARD MEDICAL SCHOOL (nih funded) |
| Locations | 1 site (BOSTON, UNITED STATES) |
| Trial ID | NIH-11300949 on ClinicalTrials.gov |
What this research studies
The project examines two sets of nerve cells outside the cochlea—the lateral olivocochlear neurons (LOCs) and inner ear sympathetic neurons (IESNs)—and how they act together during noisy or stressful situations. Researchers will map where these neurons connect in the ear, record nerve activity, measure effects on cochlear blood flow, and test what happens to hair cells and synapses when these pathways are activated or removed. Most work will use animal models to trace axons, record action potentials, and simulate acoustic trauma to observe damage and protection mechanisms. Results aim to reveal nerve-based mechanisms that could be targeted to reduce hearing damage from noise.
Who could benefit from this research
Good fit: People exposed to frequent or intense loud noise—such as military personnel, musicians, or industrial workers—or those worried about noise-related hearing loss would be most interested in these findings.
Not a fit: People whose hearing loss is primarily due to aging or genetic conditions unrelated to noise exposure may not benefit directly from this line of research.
Why it matters
Potential benefit: If successful, this work could point to new ways to protect hearing by targeting nerve pathways that control cochlear blood flow and nerve activity.
How similar studies have performed: Prior animal studies show that efferent nerve pathways can change cochlear sensitivity and influence damage from noise, but the proposed dual-role interaction of LOCs and IESNs is a relatively new focus.
Where this research is happening
BOSTON, UNITED STATES
- HARVARD MEDICAL SCHOOL — BOSTON, UNITED STATES (ACTIVE)
Researchers
- Principal investigator: GOODRICH, LISA — HARVARD MEDICAL SCHOOL
- Study coordinator: GOODRICH, LISA
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.