The chorda tympani nerve terminal field expands by 15 d after nerve cut. Total chorda tympani nerve terminal field volume was examined at 5, 6, 8, 10, and 15 d after nerve cut. An exponential line of best fit (plateau followed by one phase association) determined that the maximal expansion of chorda tympani nerve terminal field volume is complete within 15 d following greater superficial petrosal and glossopharyngeal nerve section. Closed circles, Adult cuts; dotted line, sham.