[Analysis of polymodality in the distribution of latent periods and amplitudes of single-quantum synaptic potentials in the frog neuromuscular junction].
Intracellular recording with low concentrations of Ca2+ ions as analysed in the histograms of latency values and amplitude distributions, revealed 4-7 peaks in unitary potentials from the neuromuscular junction in the frog sartorius muscle. The increase of Ca2+ ions concentration led to disappearance of the multimodality. Extracellular recording revealed but a single mode in histograms of distributions. The number of modes in latency values distributions was found to have a positive correlation with values of the binominal parameter n and the number of peaks in histograms of the EP amplitudes. The peaks in histograms of distribution of the latency values and amplitudes of unitary EPs seem to reflect the action of transmitter release in the nerve terminals.
D000200:Action Potentials; D000818:Animals; D001001:Anura; D002118:Calcium / Q000502:physiology; D009046:Motor Neurons / Q000378:metabolism; D009469:Neuromuscular Junction / Q000502:physiology*; D018377:Neurotransmitter Agents / Q000378:metabolism; D011930:Reaction Time / Q000502:physiology; D009435:Synaptic Transmission
D018377:Neurotransmitter Agents; D002118:Calcium
Analiz polimodal'nosti v raspredeleniiakh latentnykh periodov i amplitud odnokvantovykh sinapticheskikh potentsialov v nervno-myshechnom soedinenii liagushki.