Nakahama H, Shima K, Aya K, Fujii H
Neurosci Lett. 1981 Aug 7;25(1):43-6. doi: 10.1016/0304-3940(81)90098-7.
A total of 50 neurons in the periaqueductal gray (PAG) of the cat were studied. Sixty percent of the units were excited by nociceptive pinch stimulation. These units were also excited by non-nociceptive stimulation such as tapping, hair movement and/or joint rotation. Non-nociceptive stimulation excited 20% of the units, whereas nociceptive stimulation did not drive these units. Their receptive fields were large, and often encompassed the entire body. Spontaneous discharges of PAG neurons revealed great irregularity.
共研究了猫中脑导水管周围灰质（PAG）中的50个神经元。60%的神经元在受到伤害性夹捏刺激时被兴奋。这些神经元也会被轻敲、毛发移动和/或关节旋转等非伤害性刺激所兴奋。20%的神经元被非伤害性刺激兴奋，而伤害性刺激并不会驱动这些神经元。它们的感受野很大，常常覆盖整个身体。PAG神经元的自发放电表现出很大的不规则性。
