The phrase "action potentials are" is correct and usable in written English.
You can use it when discussing the characteristics or functions of action potentials in a scientific or educational context.
Example: "Action potentials are essential for the transmission of signals in the nervous system."
Alternatives: "action potentials represent" or "action potentials refer to".
Action potentials are characterized by a strong depolarization, followed by a hyperpolarization (decrease in membrane potential).
Furthermore, the resultant barrages of action potentials are generated in the distal axon, far from the soma22,23.
Such codes would solve the problem of representing information in nervous systems in which action potentials are unreliable.
In classic graded transmission, action potentials are not necessary for transmitter release because the threshold for transmitter release is often close to the resting potential.
Synaptically induced action potentials are observed in field potentials as positive-going population spike deflections in records from the stratum radiatum (Fig. 2c, top right, black arrow).
Action potentials are all or none events, and their method of generation can be characterized by an integrate and fire approach.
Trains of action potentials are optimally evoked and extinguished by 380 nm and 500 nm light, respectively, while intermediate wavelengths provide graded control over the amplitude of depolarization.
It is not obvious, however, how a pyramidal cell in such a network could control its output when action potentials are free to propagate from the axons of other pyramidal cells into its own axon.
This variance will appear as a an additional variation in action potential threshold in the soma, since action potentials are actually initiated in the axon and then back-propagate into the soma.
Neurons, we learn, are polarised entities where information flows from multiple dendrites via the soma to a single process called the axon, where action potentials are generated at the axon initial segment, and neurotransmitter released at the axonal terminals.
However, in this simulation exercise in NEURON, when I change the stimulus current from -0.5 to -1 mA or 2mA, clearly the peak voltage of action potentials are increasing.
