PSYC 3103 Chapter Notes - Chapter 31: Cortisol, Meadow Vole, Neurochemistry
26 Oct 2020
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The human potential for attachment and bonding is based in specific neurochemical systems: Bond with vigorous and sustained sex (ot and avp evolved from vasoticin). Separated young show distress vocalizations (separation cries) and stress (cortisol [cort] secretion). In contrast, outwardly similar meadow voles are polygamous, bonds are temporary, families live scattered, young more independent. Voles demonstrate monogamy versus polygamy differences in social organization. Live together within a common nest and territory. Snuggle with mate over 50% of the time in side-by-side postures. Both care for the young pups: male helps build the nest, spends almost as much time with the young as female. Separated pups become agitated and display ultrasonic distress calls and high stress response with increases in cort. less sexual dimorphism of the brains. Female prairie vole: ot is necessary and sufficient for bonding. Male prairie vole: avp is necessary and sufficient for bonding. Pups do not appear to be distressed by abandonment.
