Inhibitory and excitatory neuronal networks in the motor-related cortices of the primate

在大鼠和猫的皮层中，含有GABA抑制细胞的小白蛋白（PV）通过间隙连接（电突触）相互连接。据报道，在猫的PV电池树突上存在30到50个结。另一方面，在猴子的皮质中，每个PV细胞的树突上只观察到几个间隙连接。PV细胞在兴奋性锥体细胞上也有篮状末端。灵长类动物皮层锥体细胞中含有pv的篮状终端的密度高于啮齿类动物。在灵长类动物的皮层中，抑制性细胞对兴奋性锥体细胞的抑制强于啮齿类动物的皮层。

In the cortex of the rats and cat, parvalbumin (PV) containing GABA inhibitory cells connected each other by gap junction (electric synapses). Thirty to fifty junctions were reported to exist on the dendrites of a PV cell in the cats. In the cortex of the monkey, on the other hand, only several gap junctions were observed on dendrites of each PV cells. PV cells were also known to have basket terminals on the excitatory pyramidal cells. A higher density of PV-containing basket terminals was observed on the pyramidal cells in the primate cortex than in the rodent. In the cortex of the primate, inhibitory cells inhibit the excitatory pyramidal cells stronger than in the cortex of the rodents.