Some Aspects of Rate Coding in the Auditory Nerve

A number of schemes for the encoding of complex stimuli in populations of auditory-nerve fibers have been studied in the past decade. These schemes differ in their assumptions about which aspects of auditory nerve fiber spike trains encode signal strength. Rate-place codes represent spectral features, such as the formants of speech, in terms of the distribution of average discharge rate across fiber best frequency (BF) (Kiang and Moxon, 1974; Sachs and Young, 1979; Delgutte and Kiang, 1984). Temporal-place codes make use of the fine temporal details (phase-locking) of the auditory-nerve spike patterns to represent stimulus features (Young and Sachs, 1979; Reale and Geisler, 1980; Delgutte and Kiang, 1984a).

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