Abstract
Compound action potential (AP) thresholds and tuning curves were measured in the alligator lizard using techniques similar to those used with the mammal. For tone burst stimuli, the AP was a major component of the gross response, the electrical response to sound recorded by a wire electrode near the cochlea. The AP thresholds agreed well with threshold estimates based on single-fiber data. A forward masking paradigm produced AP tuning curves which resemble single-fiber tuning curves. A simultaneous masking paradigm produced curves which match the boundaries of single-fiber two-tone rate suppression. The AP thresholds and tuning curves provide useful information about the peripheral physiology of the ear of the alligator lizard.
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