Brazhnik E S, Vinogradova O S, Karanov A M
Zh Vyssh Nerv Deiat Im I P Pavlova. 1985 Jul-Aug;35(4):724-32.
Activity of the neurones with stable theta-bursts was recorded extracellularly in intact and hippocampectomized septum of unanaesthetized chronic rabbits during low-frequency (3-17 Hz) stimulation of horizontal limb of the diagonal band or the lateral septal nucleus. Gradual entrainment and phase-locking of the spontaneous theta-cycles occurred. Two types of entrainment were observed: "entrainment by pause", where interburst interval was reset by the stimuli; and "entrainment by burst", where bursts were time-locked to the stimuli. Such reorganization of the spontaneous bursts occurred in a narrow frequency range of stimulation (from 4 Hz up to 9-12 Hz), with the best resonance following in the range of "basic" theta frequencies of the awake rabbit (5-6 Hz). With stimulation beyond the theta-range three phenomena occurred: shift of the burst frequencies to higher or lower harmonics of stimulation frequencies; complex interactions of basic background frequency with the rhythm of stimulation ("beating"); escape from the influence of the stimuli with return to background theta-burst frequency.
在未麻醉的慢性家兔完整的和海马切除的隔区中，在对角带水平支或外侧隔核低频（3 - 17赫兹）刺激期间，细胞外记录具有稳定θ波爆发的神经元的活动。自发θ波周期出现逐渐的夹带和锁相。观察到两种夹带类型：“暂停夹带”，其中刺激重置爆发间期；以及“爆发夹带”，其中爆发与刺激时间锁定。自发爆发的这种重组发生在狭窄的刺激频率范围内（从4赫兹到9 - 12赫兹），在清醒家兔的“基本”θ频率范围（5 - 6赫兹）内跟随最佳共振。当刺激超出θ范围时，出现三种现象：爆发频率转移到刺激频率的更高或更低谐波；基本背景频率与刺激节律的复杂相互作用（“拍频”）；摆脱刺激影响并恢复到背景θ波爆发频率。
