Serotonergic modulation of the P13 midlatency auditory evoked potential in the rat |
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| Authors: | Miyazato H Skinner R D Crews T Williams K Garcia-Rill E |
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| Affiliation: | Department of Anatomy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA. |
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| Abstract: | The vertex-recorded, sleep state-dependent P13 midlatency auditory evoked potential in the rat may be generated, in part, by pedunculopontine nucleus (PPN) projections. Injections into the PPN of the 5-HT(1A) serotonin receptor agonist, 8-hydroxy-2-di-n-propylaminotetralin hydrobromide (DPAT), were found to reduce the amplitude of the P13 potential in a dose- and time-dependent manner. The suppressive effect of DPAT was blocked or reduced by pretreatment with the 5-HT(1A) serotonin receptor antagonist, Pindobind. These results show that the P13 potential can be modulated by known inhibitory serotonergic inputs to the PPN. |
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| Keywords: | Auditory evoked potentials P1 potential Pedunculopontine nucleus Reticular activating system Serotonin |
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