Cochlear Hair Cell Damage Pattern
Noise and age damage outer hair cells first, base to apex.
- OHC: Cell type first lost (outer hair cells, short placeholder)
- Base: Damage onset region (high-frequency region, placeholder)
- None: Recovery capacity (mammalian hair cells, placeholder)
- Noise/Age: Typical trigger (short placeholder cause)
Damage mechanism
Short placeholder describing outer hair cell stereocilia damage.
Frequency-Specific Hearing Loss Mapping
Cochlear place-frequency mapping determines which pitches fade.
- Base→Apex: Tonotopic axis (high to low, placeholder)
- 4 kHz: Common notch (noise-induced dip, placeholder)
- Sloping: Audiogram shape (short placeholder pattern)
- Audiogram: Mapping tool (short placeholder tool)
Frequency mapping
Short placeholder on tonotopic frequency-to-place mapping.
Reduced Input to Cochlear Neurons
Lost hair cells starve spiral ganglion neurons of input drive.
- Spiral ganglion: Affected neurons (short placeholder label)
- Reduced: Input signal (short placeholder change)
- Early: Synapse loss (hidden hearing loss, placeholder)
- Deafferentation: Downstream effect (short placeholder term)
Deafferentation
Short placeholder describing reduced afferent neural input.
Tinnitus Pitch-Matching to Hearing Loss Frequency
Central auditory gain rises, phantom tone matches loss edge.
- Edge freq.: Pitch match (short placeholder mapping)
- Central gain: Mechanism (short placeholder term)
- High overlap: Prevalence link (short placeholder stat)
- High-tone: Typical pitch (short placeholder range)
Pitch-match mechanism
Short placeholder on central compensation generating tinnitus.
Hearing Aid Amplification Benefit
Restoring audible input can reduce tinnitus salience for some.
- Partial input: Benefit type (short placeholder benefit)
- Variable: Tinnitus relief (short placeholder outcome)
- Matched loss: Best candidates (short placeholder note)
- Sound therapy: Common addition (short placeholder combo)
Amplification effect
Short placeholder on hearing aid restoring cochlear input.
Short placeholder key insight about amplification and tinnitus relief.