Journal
NEUROREPORT
Volume 11, Issue 14, Pages 3295-3298Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200009280-00049
Keywords
burst firing; determinism; dorsal root ganglion; interevent internal; interspike internal; non-linear prediction; unstable periodic orbits
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Irregular burst firing is spontaneously generated by rat dorsal root ganglion neuron after chronic compression. To investigate the time series of burst firing, we recorded interspike intervals (ISIs) of single-unit firing in vitro and processed the ISIs to obtain interevent intervals (IEIs). Then, two non-linear methods were applied to detect deterministic dynamic behaviors in IEI series. No evidence for the existence of determinism was found with non-linear prediction method. Using unstable periodic orbit identification method, significant period-1 orbits were identified in all 10 data, period-2 orbits in eight, and period-3 orbits in six. The results indicate that there exist significant deterministic behaviors in the time series of irregular burst firing from the injured sensory neuron. NeuroReport 11:3295-3298 (C) 2000 Lippincott Williams & Wilkins.
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