J Physiol Volume 576, Number 2, 341-347, October 15, 2006 DOI: 10.1113/jphysiol.2006.110270
Can homeostatic circuits learn and remember?
Grant R. J. Gordon1 and
Jaideep S. Bains1
1 Hotchkiss Brain Institute and the Department of Physiology and Biophysics, University of Calgary, Calgary, AB, Canada T2N 4 N1
Alterations in synaptic strength are thought to represent the cellular basis of learning and memory. While such processes appear to be fundamental to all synapses, until recently there has been a relative dearth of information regarding synaptic memory processes in autonomic circuits. Here we examine recent advances in our understanding of plasticity at glutamatergic synapses onto magnocellular neurosecretory cells in the hypothalamus, paying particular attention to the contributions of noradrenaline in coding long-lasting pre- and postsynaptic changes in efficacy. We also highlight recent work demonstrating that glial cells play a crucial role in the induction of long-term potentiation. Based on the work reviewed here, we have a clearer picture of the synaptic and cellular mechanisms that allow autonomic pathways to learn and remember.
(Received 23 March 2006;
accepted after revision 17 July 2006;
first published online 20 July 2006)
Corresponding author J. S. Bains: Hotchkiss Brain Institute and the Department of Physiology and Biophysics, University of Calgary, Calgary, AB, Canada T2N 4 N1. Email: jsbains{at}ucalgary.ca
Copyright © 2006 The Physiological Society.