Search results for "Autonomic Agents"

showing 2 items of 2 documents

Head-twitch and forepaw-shake responses after single and repeated treatment with rolipram: interaction with noradrenergic and dopaminergic agonists a…

1988

PharmacologyMaleBehavior AnimalChemistryDopamine AgentsRats Inbred StrainsShakePharmacologyAutonomic AgentsPyrrolidinonesRatsRepeated treatmentForelimbmedicineHead (vessel)AnimalsDopamine AntagonistsDrug InteractionsDopaminergic AgonistsHeadRolipramRoliprammedicine.drugPharmacological research communications
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Ability of short-time Fourier transform method to detect transient changes in vagal effects on hearts: a pharmacological blocking study.

2006

Conventional spectral analyses of heart rate variability (HRV) have been limited to stationary signals and have not allowed the obtainment of information during transient autonomic cardiac responses. In the present study, we evaluated the ability of the short-time Fourier transform (STFT) method to detect transient changes in vagal effects on the heart. We derived high-frequency power (HFP, 0.20–0.40 Hz) as a function of time during active orthostatic task (AOT) from the sitting to standing posture before and after selective vagal (atropine sulfate 0.04 mg/kg) and sympathetic (metoprolol 0.20 mg/kg) blockades. The HFP minimum point during the first 30 s after standing up was calculated and…

Cardiac responseAdultAtropineMalemedicine.medical_specialtySympathetic Nervous SystemPhysiologyAdrenergic beta-AntagonistsPostureBlood PressureMuscarinic AntagonistsDizzinessOrthostatic vital signsPhysiology (medical)Internal medicinemedicineHeart rate variabilityHumansFourier AnalysisChemistryBlocking (radio)Short-time Fourier transformHeartVagus NerveAutonomic AgentsTime–frequency analysisSurgeryAutonomic nervous systemCardiologyTransient (oscillation)Cardiology and Cardiovascular MedicineMetoprololAmerican journal of physiology. Heart and circulatory physiology
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