Isokawa M, Komisaruk B R
Electroencephalogr Clin Neurophysiol. 1983 May;55(5):580-5. doi: 10.1016/0013-4694(83)90169-4.
The frequencies of EEG alpha rhythm and physiological finger tremor overlap at 9-10 c/sec, suggesting a functional relationship between the two mechanisms. We measured the correlation between the two rhythms when they occurred spontaneously and when rhythmical photic stimulation was applied. Rhythmical physiological finger tremor (9.7 c/sec +/- 1.06 S.D.) was accompanied by an alpha rhythm (10.3 c/sec +/- 0.51 S.D.) spontaneously, showing a one-to-one relationship at times. When photic stimulation was provided at a frequency (11 Hz) close to the subject's spontaneous alpha rhythm, a frequency-convergence occurred between finger tremor (10.3 c/sec +/- 0.68 S.D.) and the EEG (10.6 c/sec +/- 0.35 S.D.). The correlation coefficient between the two rhythms under photic stimulation was significantly higher (0.49 +/- 0.14 S.D.) than under the spontaneous condition (0.13 +/- 0.16; P less than 0.05). Consistent with this, the mean difference between finger tremor and EEG frequencies was significantly lower during photic stimulation (0.83 c/sec +/- 0.46 S.D.) than during the spontaneous condition (1.23 c/sec +/- 0.82 S.D.) (t = 2.54; P less than 0.05, t-test for correlated means). These findings indicate that the EEG and physiological finger tremor tend toward synchrony with each other in an environment of photic stimulation, supporting our hypothesis of a functional relationship between the two mechanisms.
脑电图α节律的频率与生理性手指震颤的频率在9至10次/秒时重叠，这表明这两种机制之间存在功能关系。我们测量了两种节律在自发出现时以及施加节律性光刺激时的相关性。节律性生理性手指震颤（9.7次/秒±1.06标准差）自发地伴随着α节律（10.3次/秒±0.51标准差），有时呈现一对一的关系。当以接近受试者自发α节律的频率（11赫兹）提供光刺激时，手指震颤（10.3次/秒±0.68标准差）和脑电图（10.6次/秒±0.35标准差）之间出现了频率收敛。光刺激下两种节律之间的相关系数（0.49±0.14标准差）显著高于自发状态下（0.13±0.16；P小于0.05）。与此一致的是，光刺激期间手指震颤和脑电图频率之间的平均差异（0.83次/秒±0.46标准差）显著低于自发状态下（1.23次/秒±0.82标准差）（t = 2.54；P小于0.05，相关均值的t检验）。这些发现表明，在光刺激环境中，脑电图和生理性手指震颤倾向于彼此同步，支持了我们关于这两种机制之间功能关系的假设。
