Activation and odor conditioning of suckling behavior in 3-day-old albino XXXX .

@entity32128 @entity22529 @entity5834 @entity35 @entity4944
The circumstances under which a novel odor could elicit nipple attachment behavior in 3-day-old albino @entity35 were investigated. In Experiment 1, @entity35 suckled washed nipples scented with @entity22529 (a lemon odor) only if they either had received tactile stimulation (by stroking with a soft artist's brush) or had been administered @entity4944 in the presence of @entity22529 prior to the suckling test. Pups stimulated in @entity22529 's absence or simply exposed to @entity22529 without stimulation failed to suckle such nipples. In Experiment 2, @entity35 stimulated in a @entity32128 (an almond odor) ambience suckled washed nipples scented with @entity32128 but not those with @entity22529 scent. The opposite held for @entity35 stimulated in a @entity22529 -rich environment. The stimulus conditions that support this conditioning were investigated in Experiment 3. Simultaneously increasing @entity22529 concentration and raising ambient temperature markedly attenuated the phenomenon. Experiment 4 demonstrated that not all classes of stimulation produced conditioning. @entity5834 , in a wide range of doses, did not allow @entity22529 to elicit suckling on washed nipples. These findings are discussed within a framework of higher order conditioning. They may provide a mechanism by which naturally occurring stimuli come to elicit the species- and age-typical behavior of suckling.
