C_S_D 4430 Lecture Notes - Lecture 34: White Matter, Auditory Cortex, Sound Intensity
Document Summary
Electrical changes within the hair cells are called receptor potentials. The first place where action potential scan be generated is in the 1st order neurons that form the viii cranial nerve. Place coding, tonotopical organization of the cochlea and auditory nervous system. Temporal coding, timing of neural impulses reflect timing of the incoming pressure changes. As the intensity, or magnitude, of the signal entering the ear increases, the number of neural impulses sent to the brain increases and their magnitude is greater. Greater neural activity corresponds to greater sound intensity. Spinal ganglia/auditory nerve neurons that make up the auditory nerve synapse at the base of the hair cells and their cell bodies come together in groups to form the spinal ganglia. The first location within the central nervous system; right ear information goes to the right cochlear nucleus and left ear information goes to the left cochlear nucleus.
