Journal
BRAIN RESEARCH REVIEWS
Volume 57, Issue 1, Pages 29-36Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.brainresrev.2007.06.020
Keywords
locomotion; modulation; mGluR; endocannabinoids; retrograde signalling; spinal cord
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To understand how the spinal central pattern generators produce locomotor movements, it is necessary to characterize the network's connectivity, the intrinsic properties of the constituent neurons and the modulatory mechanisms. Modulation operating within spinal locomotor networks is required for the generation of the final motor output. In this review, we have summarized how endocannabinoids released by locomotor network neurons contribute to setting the baseline locomotor frequency. They are synthesized on demand as a result of activation of mGluR1 and act as retrograde messengers to depress inhibitory synaptic transmission. We also discuss how endogenous activation of mGluR1 contributes to the normal operation of the spinal locomotor network and the underlying cellular and synaptic mechanisms. (c) 2007 Elsevier B.V. All rights reserved.
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