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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Role of locus coeruleus alpha1-adrenoceptors in motor activity in rats.

The question of whether or not the locus coeruleus (LC) participates in the control of motor activity has been controversial due to difficulties in demonstrating permanent motor deficits after neurotoxic lesions of this nucleus or of the dorsal noradrenergic bundle (DNB). In the present experiments it was shown in rats that acute local blockade (with terazosin) or stimulation (with phenylephrine) of LC alpha(1)-adrenoceptors respectively blocked or stimulated exploratory behavior in a novel cage and the home cage. Moreover, previous lesion of the DNB by i.p. DSP4 abolished the behavioral changes to local LC alpha(1)-receptor manipulation but did not affect motor activity in the novel or home cage by itself. These findings are consistent with the hypothesis that the intact LC does contribute to motor activity control, exerted in part by its alpha(1)-receptors; however, the permanent loss of this nucleus is compensated for by remaining CNS motor structures.[1]


  1. Role of locus coeruleus alpha1-adrenoceptors in motor activity in rats. Stone, E.A., Lin, Y., Ahsan, R., Quartermain, D. Synapse (2004) [Pubmed]
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