Function of Cochlea, BM, Mobility, etc..

Question 1

Round Window function

Answer 1

• acts as a pressure release
• allows cochlear fluids to flow, as a result of stapes movement
• w/o this give, stapes would not be able to move

Question 2

Sound Enters the Cochlea….

Answer 2

• wave of vibration goes down cochlea
• point of maximum displacement (determined by resonant properties of BM)
• when you hear, you’re going to hear sound where the BM is vibrating at maximum displacement

Question 3

The BM is _________ resonant

Answer 3

• Selectively
• not all parts vibrate equally well to sine wave of a particular frequency
• diff freq sine waves cause maximum vibration at diff places along the membrane
• base=vibrates better to high Hz
• apex = vibrates better to low Hz