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Unformatted text preview: Affiliated behavior - regulated by oxy and vaso, but requires presence of sex steroid hormones Feature: Approach - get over avoidance Learn Identity Mother/lamb bond = oxy acting on olf bulb Mice = also involves oxy on olf bulb, but then projects to amygdala where has actual effect Ongoing investment in partner - rewarding properties of interacting with partner Pair bonds have been studied best in voles Some species of voles are monogamous, but others are not Affiliative behaviors are often tested using these two types of voles Monogamous voles differ primarily in larger nucleus accumbens Oxy presence and projections are still the same in both types of voles Differences do not occur due to differences in peptide distributions, but due to differences in brain regions Female voles with two diff partner choices --> Blocking of nucleus accumbens causes greatest change in preference from partner to stranger Male voles : Vasopressin increases unmated preference for a partner Blocking vasopressin decreases mated preference for partner...
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- Spring '08