The involvement of other 5-HT receptor subtypes in HR regulation is discussed in the Supporting Information
The involvement of other 5-HT receptor subtypes in HR regulation is discussed in the Supporting Information. Central 5-HT1A receptor involvement and the brain areas implicated 5-HT1A receptors are found predominantly in the CNS (brain and spinal cord) and parasympathetic control is exerted via direct outputs from the brain stem. to 550 bpm, without changing the conditioned HR response to the sound. 8-OH-DPAT induced profound QT prolongation and bradyarrhythmic episodes. nonlinear analysis indicated a pathological state of HR dynamics DMAT after 8-OH-DPAT (0.5 mgkg?1) with ANS hyperactivation impairing HR adaptability. The 5-HT1A receptor antagonist WAY-100635 (0.03 mgkg?1) blocked these effects of 8-OH-DPAT. CONCLUSIONS AND IMPLICATIONS Pre-training 5-HT1A receptor activation by 8-OH-DPAT (0.5 mgkg?1) impaired memory of conditioned auditory fear based on an attenuated HR increase, whereas pretest administration did not prevent…