Neurogenesis and Neural Plasticity pp 139-164

Part of the Current Topics in Behavioral Neurosciences book series (CTBN, volume 15)

Differential Effects of Stress and Glucocorticoids on Adult Neurogenesis

Chapter

Abstract

Stress is known to inhibit neuronal growth in the hippocampus. In addition to reducing the size and complexity of the dendritic tree, stress and elevated glucocorticoid levels are known to inhibit adult neurogenesis. Despite the negative effects of stress hormones on progenitor cell proliferation in the hippocampus, some experiences which produce robust increases in glucocorticoid levels actually promote neuronal growth. These experiences, including running, mating, enriched environment living, and intracranial self-stimulation, all share in common a strong hedonic component. Taken together, the findings suggest that rewarding experiences buffer progenitor cells in the dentate gyrus from the negative effects of elevated stress hormones. This chapter considers the evidence that stress and glucocorticoids inhibit neuronal growth along with the paradoxical findings of enhanced neuronal growth under rewarding conditions with a view toward understanding the underlying biological mechanisms.

Keywords

Stress Neurogenesis Dentate gyrus Reward Learning Anxiety Physical activity Sexual experience 

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of Psychology, Neuroscience InstitutePrinceton UniversityPrincetonUSA

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