Maternal attenuation of hypothalamic paraventricular nucleus norepinephrine switches avoidance learning to preference learning in preweanling rat pups.

@article{Shionoya2007MaternalAO,
  title={Maternal attenuation of hypothalamic paraventricular nucleus norepinephrine switches avoidance learning to preference learning in preweanling rat pups.},
  author={Kiseko Shionoya and St{\'e}phanie Moriceau and Peter Bradstock and Regina M Sullivan},
  journal={Hormones and behavior},
  year={2007},
  volume={52 3},
  pages={391-400}
}
Infant rats learn to prefer stimuli paired with pain, presumably due to the importance of learning to prefer the caregiver to receive protection and food. With maturity, a more 'adult-like' learning system emerges that includes the amygdala and avoidance/fear learning. The attachment and 'adult-like' systems appear to co-exist in older pups with maternal presence engaging the attachment system by lowering corticosterone (CORT). Specifically, odor-shock conditioning (11 odor-0.5 mA shock trials… CONTINUE READING
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