Anatomy

1. When presented with low-intensity sounds, these stimulate the IHCs by displacing fluids in the subtectorial space
4. Do not require assistance from OHCs when presented with high-intensity sounds
7. This lamina rests on top of hair cell bodies
8. Inhibitory phase of the acoustic waveform that causes the TM to go in, the stapes footplate to go in, the BM to go down, and the round window to go in
9. Excitatory phase of the acoustic waveform that causes the TM to go out, the stapes footplate to go out, the BM to go up, and the round window to go out
10. Determined by how much the stapes is moving
12. Opposite of impedance
13. Testing at this intensity leads to broader tuning curves
14. Battery that helps ions move
16. Hair cell tip links deflect towards kinocilia
18. Action potential that originates from the spiral ganglion cells of the auditory nerve
19. Fluid displaced in Scala Vestibuli

2. These move in the opposite direction of HC bodies
3. Determined by stapes speed
5. Motor protein that helps OHCs move
6. This plays a significant role in BM fine-tuning and reverse transduction
11. Hair cell tip links that deflect away from kinocilia
15. These curves are the visual depiction of frequency selectivity of the cochlea
16. Fluid with high K+ concentration, but low Na+ concentration
17. The physical characteristics of this membrane affect the speed and the amplitude of the traveling wave