The stochastic nature of action potential backpropagation in apical tuft dendrites
Author(s) -
Shaina M. Short,
Katerina D. Oikonomou,
WenLiang Zhou,
Corey D. Acker,
Marko Popović,
Dejan Zec̆ević,
Srdjan D. Antic
Publication year - 2017
Publication title -
journal of neurophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 245
eISSN - 1522-1598
pISSN - 0022-3077
DOI - 10.1152/jn.00800.2016
Subject(s) - tuft , dendritic spike , bursting , apical dendrite , soma , biophysics , neuroscience , chemistry , dendritic spine , patch clamp , electrophysiology , biology , excitatory postsynaptic potential , physics , hippocampal formation , inhibitory postsynaptic potential , thermodynamics
The bAP-Ca 2+ signal amplitudes in some apical tuft branches randomly vary from moment to moment. In repetitive measurements, successful AP invasions are followed by complete failures. Passive spread of voltage from the apical trunk into the tuft occasionally reaches the threshold for local Na + spike, resulting in stronger Ca 2+ influx. During a burst of three somatic APs, the peak of dendritic Ca 2+ in the apical tuft occurs with a delay of 20-50 ms depending on AP frequency.
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