Gamma oscillations in the auditory cortex of awake rats

摘要: Numerous reports of human electrophysiology have demonstrated gamma (30–150 Hz) frequency oscillations in the auditory cortex during listening. However, only a small number studies non-human animals provided evidence for In this report, multi-site recordings from primary (A1) were carried out using 16-channel microelectrode array awake rats as they passively listened to tones. We addressed two fundamental questions: 1) Is passive listening associated with an increase oscillation A1?; if so, 2) Are A1 coherent within local networks and/or over long distances? All sites showed short-latency burst activity low-gamma (30–70 and high-gamma (90–150 bands field potential (LFP). Additionally, 53% also longer-latency bursts that occurred episodically up 350 ms after tone onset, but these varied both latency occurrence across trials. There was significant coherence band between spike LFP recorded same electrode. neither LFPs nor spaced at least 300 μm apart band. The experiments are present, not uniformly expressed, throughout there is strong spatiotemporal organization activity.