Abstract：
:Rats exhibit a sensitive period from the time of birth until postnatal day 10 during which they develop preferences for odors even if those odors are paired with a moderately aversive stimulus. It is still unknown whether pre-exposure to an odor produces alterations on intake responses of basic tastants, and on other patterns that indicate a change in the hedonic value of reward, such as nipple grasping behavior. The current study assessed the effect of pre-exposure to an odor immediately after birth on intake responses of appetitive and aversive tastants. The objectives were to assess if 3-hour-old rats adjust their behaviors to obtain different values of appetitive and aversive rewards in the presence of a familiar odor. Specifically we wanted to determine whether the intake of saccharin or quinine, administered through the artificial nipple, increases in the presence of the familiar odor. Results showed that 3-hour-old rats differentially respond to two different concentrations of saccharin and two concentrations of quinine. In the presence of the pre-exposed odor newborn rats increased intake and grasp responses to the artificial nipple containing quinine. This effect disappeared with a higher concentration of quinine. These results suggest that the pre-exposed odor generated a change in the hedonic value of the aversive reward.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
Kamenetzky GV,Suárez AB,Pautassi RM,Mustaca AE,Nizhnikov MEdoi
10.1016/j.physbeh.2014.12.041subject
Has Abstractpub_date
2015-09-01 00:00:00pages
51-7eissn
0031-9384issn
1873-507Xpii
S0031-9384(14)00665-9journal_volume
148pub_type
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