Measuring fundamental frequencies in local field potentials
Measuring fundamental frequencies in local field potentials
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DOI：
10.1016/j.jneumeth.2004.03.014
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发表时间：
2004-09-30
影响因子：
3
通讯作者：
Redish, AD
中科院分区：
文献类型：
--
作者：
Masimore, B;Kakalios, J;Redish, AD
神经过程在局部场电位中表现出节律性振荡；由于其高度非平稳的性质，其特征频率的识别是复杂的。一种简单的技术，结合傅里叶变换和相关系数产生明确的频率确定，而不需要先验滤波。该程序还提供了有关频率之间相互作用的定量信息。使用这项技术计算了从清醒的行为大鼠的海马体、皮质和纹状体获得的局部场电位数据中的基频。用这项技术从海马体和大脑皮层识别出的特征频率与已知的振荡一致。将其应用于纹状体背侧局部场电位，发现了一个低频的theta分量和一个50-55赫兹的窄伽马频带振荡。(C)2004爱思唯尔B.V.保留所有权利。
Neural processes display rhythmic oscillations in local field potentials; identification of their characteristic frequencies is complicated due to their highly non-stationary nature. A simple technique, combining Fourier transforms and correlation coefficients yields unambiguous determinations of the frequencies without a priori filtering. This procedure also provides quantitative information concerning interactions between frequencies. Fundamental frequencies in local field potential data acquired from the hippocampus, cortex, and striatum from awake, behaving rats were calculated using this technique. Characteristic frequencies identified using this technique from hippocampus and cortex agreed with known oscillations. Application to dorsal striatal local field potentials identified a low-frequency theta component as well as a narrow gamma band oscillation at 50-55 Hz. (C) 2004 Elsevier B.V. All rights reserved.