Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Auditory Nerve

S&H A&P PowerPoint 6

Describe type II fibers within the cochlear nerve Unmyelinated, too small to be studied, 5% of cochlear nerve. Spiral and make connection with three rows of outer hair cells.
Describe type I fibers within the cochlear nerve Black, fatty coat of myelin wraps the nerve of each fiber, 95% of cochlear nerve. Each contacts ONE inner hair cell.
Type I and type II fibers are both afferant, and both conduct information from the cochlea to the central nervous system
What happens in the absence of sound? Auditory nerve fibers fire action potentials randomly--spontaneous discharge of glutamate from IHC (spontaneous activity)
What are the two mechanisms of frequency coding? Tonotopy and phase-locking
Phase-locking action potential is in phase at the same moment as the peak of condensation--therefore brain knows frequency of action potential by counting wavelengths. Reliable up to 4kHz
What are the two mechanisms of intensity level coding? Firing rate and spread of excitation
Firing rate the rate at which action potential is fired according to the frequency
Spread of excitation The amount of action potential fired at different points along the basilar membrane
Created by: 100000299709410