A simple wiring diagram of the cochlear nucleus. The McGregor model is a simple point neuron simulation that has repeatedly proven useful as a starting point for models of brainstem neurons, for example, the response of chop-S cells to AM tones. Since the auditory image is the product of temporal integration, one of our primary interests is to specify the nucleii associated with temporal processing and temporal integration. There, in the medial superior olive, they meet fibres from the other cochlear nucleus having the same best frequency. On the basis of single unit recordings, we now believe that this is a coincidence detection network that computes interaural time differences that are pasted to higher centres to assist in determining the laterality of the source.
Laterality is the third dimension of hearing.
Elevation and distance are only poorly represented in the sound arriving at the ear, and they are only roughly represented in hearing, so they are not included in the prinary dimensions of hearing in AIM or the autocorrelogram model.