Long-range cortical synchronization without concomitant oscillations in the somatosensory system of anesthetized cats.

作者: Stephane A. Roy , Steven P. Dear , Kevin D. Alloway

DOI: 10.1523/JNEUROSCI.21-05-01795.2001

关键词: PhysicsCortical SynchronizationSomatosensory systemPeriod (gene)Cortical neuronsNeuroscienceNeuronCATS

摘要: To determine whether neuronal oscillations are essential for long-range cortical synchronization in the somatosensory system, we characterized incidence and response properties of gamma range (20–80 Hz) among pairs synchronized neurons primary (SI) secondary (SII) cortex. Synchronized SI SII discharges, which occurred within a 3 msec period, were detected 13% (80 621) single-unit 25% (29 118) multiunit pairs. Power spectra derived from auto-correlation histograms (ACGs) revealed that ∼15% forming by oscillations. Although 24% neuron (19/80) one or both neurons, only 1% (1/80) these displayed at same frequency neurons. Similar results observed responses. When single-trial responses analyzed, vast majority still did not exhibit range. These suggest separate populations can be bound together without being constrained phase relationships defined specific oscillatory frequencies.

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