Action potential waveforms, and baseline firing rates of neurons activated by the US did not differ between genotypes and the proportion of cells responding did not differ between groups or across days.
An action potential waveform of a human ventricular cell was simulated using the mathematical model by ten Tusscher, Noble, Noble and Panfilov [45], digitized at 10 kHz, and stored as described previously in detail [44].
(b) Single action potential waveform aligned to its first derivative.
They were successfully triggered and inhibited by implementing a picrotoxin – GABA – picrotoxin injection protocol, exhibiting a direct influence of picrotoxin on the "spike type" action potential waveform.
Several action potential waveform parameters differed between vermal and lateral Purkinje neurons, irrespective of dystrophin status, including action potential amplitude, slope (both larger in the vermal region), and duration (shorter in the vermal region).
We next used the model to examine the effects of an epilepsy-linked NaV1.1 Na+ channel mutation, R1648H, on the cellular level action potential waveform.
This 'collision' provided positive evidence that an action potential waveform initiated from the sciatic nerve stimulus belonged to either a dorsal root afferent or a sympathetic efferent fiber.
B's shape concords with a typical extracellular action potential waveform and follows A with a considerably smaller and more variable delay (0 0.2 ms).
The thus obtained action potential waveform was used as command signal under voltage-clamp conditions with a cycle length of 800 ms. Data are expressed as mean±SEM.
Then, a simultaneous stimulus was applied to the sciatic nerve electrode, and the current strength increased until the action potential waveform initiated from the dorsal root (or sympathetic chain) disappeared.
The current intensity of the electrical stimulus (1/4 Hz) at the dorsal root (or sympathetic chain) was increased until an action potential waveform at a fixed latency was observed at the peroneal nerve recording electrode.
