Table 1.

Responses to pure tone stimuli

	A1	pAES	aAES
Total number of neurons tested with pure tones	123	126	128
Responsive neurons	74 of 123 (60%)	93 of 126 (74%)	80 of 128 (62%)
Selective neurons	41 of 74 (55%)	56 of 93 (60%)	34 of 80 (42%)

Responsive neurons had significantly larger spike counts after tone onset compared with spike counts for the same time interval preceding tone onset (p < 0.05, paired t test). Selective neurons had significant effect of frequency on spike counts (combined across levels at each frequency, one-way ANOVA, p < 0.05). For additional details, see Materials and Methods.