期刊
MOLECULAR BRAIN
卷 4, 期 -, 页码 -出版社
BMC
DOI: 10.1186/1756-6606-4-19
关键词
action potential soma; axon; refractory period; sodium channels
资金
- Natural Science Foundation China [30870517, 30990261]
- National Basic Research Program [2011CB504405]
- National Award for Outstanding Young Scientist [30325021]
The neurons in the brain produce sequential spikes as the digital codes whose various patterns manage well-organized cognitions and behaviors. A source for the physiologically integrated synaptic signals to initiate digital spikes remains unknown, which we studied at pyramidal neurons of cortical slices. In dual recordings from the soma vs. axon, the signals recorded in vivo induce somatic spikes with higher capacity, which is associated with lower somatic thresholds and shorter refractory periods mediated by voltage-gated sodium channels. The introduction of these parameters from the soma and axon into NEURON model simulates sequential spikes being somatic in origin. Physiological signals integrated from synaptic inputs primarily trigger the soma to encode neuronal digital spikes.
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