Figure 6.

Discrimination of novel ethyl esters of different carbon chain length by P7, P14, and mature rats using a heart rate-orienting response habituation/cross-habituation paradigm. The amount of habituation (0 carbon difference) as well as the response magnitude to the cross-habituated odors is expressed as a percentage of the initial heart rate drop for that odor. Animals at all ages can discriminate ethyl esters differing by a single carbon at the 150 ppm concentrations. Asterisks represent significant difference from habituated odor response. Error bars represent SE.