Action potentials are a basic and fast communication mode within or in between neuronal and muscular cells in the human body. The rhythmic initiation and structured propagation of action potentials in the heart are most essential for a vital organism. The use of genetically encoded biosensors based...
Atrial myocytes and ventricular myocytes are examples of non-pacemaker action potentials in the heart. Because these action potentials undergo very rapid depolarization, they are sometimes referred to as “fast response” action potentials. (Purkinje cells are fast response action potentials, but possess...
Cells within the sinoatrial (SA) node are the primary pacemaker site within the heart. These cells are characterized as having no true resting potential, but instead generate regular, spontaneous action potentials. Unlike non-pacemaker action potentials in the heart, the depolarizing current is carrie...
Combined Analog and Action Potential Coding in Hippocampal Mossy Fibers. In the mammalian cortex, it is generally assumed that the output information of neurons is encoded in the number and the timing of action potentials. Here,... Alle,Henrik,Geiger,... - 《Science》 被引量: 410发表: 2006...
Article: Differential effects of superoxide radical on the action potentials in ventricular muscles, Purkinje fibers and atrial muscles in the hear
(upstroke),followed by repolarization caused by the opening and closing of ion channels.Action potentials are propagated down nerve and muscle fibers by the spread of local currents,with the speed of conduction depending on the tissue’s cable propert 动作电位在神经和肌肉包括迅速去极化剂(向上的...
A faster, brighter picture of brain cells in action At the heart of all brain activity—thoughts, perceptions, emotions, and memories—are rapid surges of electrical activity, called action potentials, that zip through neurons and transmit information throughout the brain. Capturing this ... E ...
Action PotentialsElectrocardiographyHeartMyocardial ContractionMyocardial IschemiaEndocardiumPericardiumVentricular FunctionInformation derived from the analysis of the electrocardiographic waveform remains one of the most valuable diagnostic aids in modern cardiology. Paradoxically, although changes in the ST-T segment...
- 《Am J Physiol Heart Circ Physiol》 被引量: 174发表: 2009年 Ionic mechanisms of action potential prolongation at low temperature in guinea-pig ventricular myocytes. 1. We studied the effects of low temperature on the action potentials and membrane currents of guinea-pig ventricular myocytes, ...
CardiacActionPotentials Reading:•Klabunde,CardiovascularPhysiologyConcepts –Chapter2(ElectricalActivityoftheHeart)pages18-26 TheCardiacActionPotentialTypesAreEitherFastOrSlowResponse •Fast-responseactionpotentials –Atrialmyocardialfibers–Ventricularmyocardialfibers–Purkinjefibers •Slow-responseactionpotentials –...