Sandrew B B, Poletti C E
Brain Res. 1984 Jun 11;303(1):77-86. doi: 10.1016/0006-8993(84)90212-9.
Single neurons of the periaqueductal gray (PAG) were studied during electrical stimulation of the amygdala and hippocampus. Fifty-one percent (34/67) of the units sampled throughout the rostrocaudal extent of the PAG were found to have a limbic influence. PAG neurons were characterized by low spontaneous firing rates (means = 4.94 spikes/sec). Units responded to basolateral amygdala stimulation primarily with short duration excitatory responses having a mean latency of 30 ms (range: 13.3-110 ms). Responses to corticomedial and lateral amygdala stimulation produced different patterns of activation including complex excitatory and inhibitory sequences. Only 10 units (15%) sampled in PAG responded to hippocampal stimulation with excitatory or tonic-inhibitory responses. The majority of responsive units (8) were to anterior hippocampal stimulation (latency range: = 20-75 ms). High frequency (9 Hz) basolateral amygdala stimulation recruited responses with increases in the probability of firing and a decrease in initial latency and latency variability.
在对杏仁核和海马体进行电刺激期间，对导水管周围灰质（PAG）的单个神经元进行了研究。在PAG整个前后范围采样的单位中，发现51%（34/67）具有边缘系统影响。PAG神经元的特征是自发放电率低（平均值 = 4.94次/秒）。单位对基底外侧杏仁核刺激主要表现为持续时间短的兴奋性反应，平均潜伏期为30毫秒（范围：13.3 - 110毫秒）。对皮质内侧和外侧杏仁核刺激的反应产生了不同的激活模式，包括复杂的兴奋性和抑制性序列。在PAG中采样的只有10个单位（15%）对海马体刺激有兴奋性或紧张性抑制反应。大多数反应性单位（8个）对海马体前部刺激有反应（潜伏期范围： = 20 - 75毫秒）。高频（9赫兹）基底外侧杏仁核刺激通过增加放电概率、缩短初始潜伏期和潜伏期变异性来引发反应。
