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Hormones and Brain Plasticity$
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Luis Miguel García-Segura

Print publication date: 2009

Print ISBN-13: 9780195326611

Published to Oxford Scholarship Online: May 2009

DOI: 10.1093/acprof:oso/9780195326611.001.0001

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Brain Plasticity Regulates Hormonal Homeodynamics

Brain Plasticity Regulates Hormonal Homeodynamics

(p.21) Chapter 2 Brain Plasticity Regulates Hormonal Homeodynamics
Hormones and Brain Plasticity

Luis Miguel García-Segura

Oxford University Press

This chapter begins by examining neuroglia and synaptic plasticity in the soma and dendrites of magnocellular neurosecretory neurons in the hypothalamus and the associated neuroglial plasticity in the neurohypophysis. It then considers plastic events in parvocellular hypothalamic neurons and the associated plastic reorganization of glia and parvocellular neurosecretory endings in the median eminence. It shows that neuroglial and synaptic remodeling may participate in the regulation of hormonal release by magnocellular and parvocellular hypothalamic neurons. Glial plastic remodeling may have different consequences for the activity of neurosecretory cells by affecting the release or availability of different factors involved in synaptic function and synaptic plasticity, by modulating neuronal membrane properties and ion channels, or by regulating in an active or permissive manner the number of excitatory and inhibitory synaptic inputs.

Keywords:   neuroglia, neuroglial remodeling, hypothalamic magnocellular neurons, parvocellular hypothalamic neurons, median eminence

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