Class Notes (838,022)
Canada (510,635)
Biology (2,437)
BIOLOGY 2C03 (138)
Kim Dej (45)
Lecture

Auditory II

1 Page
108 Views
Unlock Document

Department
Biology
Course
BIOLOGY 2C03
Professor
Kim Dej
Semester
Fall

Description
Outline of Lecture 59 (03-25 A; Young) Auditory II – Central Auditory System I. Tonotopic organization (i.e. frequency map in the central auditory system) - Sound is represented tonotopically in the cochlea, which results in tonotopy in the auditory nerve fibers (see Lec 58 on best frequency) - Tonotopy is preserved throughout central auditory system, e.g. as evident in a Golgi stain of the cochlear nuclei II. Neuroanatomy of the auditory system - Sequence (1) Auditory nerve fibers from cochlea terminate in cochlear nuclei (DCN or VCN) (2) From the CN, most neurons project to superior olivary nuclei for sound localization (3) The lateral lemniscus is a collateral path to the inferior colliculus (4) All ascending neurons (from SO and LL) terminate in the inferior colliculus (5) IC projects to the medial geniculate (thalamus) - Most commisures occur at the trapezoid body, and above the SO most neurons are bi-aural III. Sound localization by azimuth - Locating a sound source carries the additional problems of (1) distinguishing multiple sound sources over background noise and (2) suppressing the effect of echoes - Due to path length difference, a sound source will have different effects on the right and left ears (1) time difference: ITD and IPD; IPD is better perceived due to phase-locking of ANFs (2) loudness difference: ILD - Relative impo
More Less

Related notes for BIOLOGY 2C03

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit