Gabbott P L, Martin K A, Whitteridge D
Department of Experimental Psychology, University of Oxford, U.K.
Proc R Soc Lond B Biol Sci. 1988 May 23;233(1273):385-91. doi: 10.1098/rspb.1988.0028.
Evidence is presented for the synaptic connectivity between a physiologically characterized and intracellularly filled GABAergic interneuron and a corticotectal pyramidal neuron in area 17 of the cat visual cortex. The interneuron was located in layer 4 and had the morphological characteristics of a clutch cell. The physiological data demonstrated that the clutch cell received direct X-type innervation from the dorsal lateral geniculate nucleus. These results indicate that a GABAergic neuron is directly involved during the first cortical stages of geniculocorticotectal interactions. Furthermore, the proximal location of the clutch-cell inputs to the labelled dendrite suggests a strategic siting of intracortical feedforward inhibition.
有证据表明，在猫视觉皮层17区，一个生理特征明确且已进行细胞内标记的γ-氨基丁酸（GABA）能中间神经元与一个皮质-顶盖锥体神经元之间存在突触连接。该中间神经元位于第4层，具有爪状细胞的形态特征。生理数据表明，爪状细胞接受来自背外侧膝状核的直接X型神经支配。这些结果表明，在膝状体-皮质-顶盖相互作用的第一皮质阶段，一个GABA能神经元直接参与其中。此外，爪状细胞输入到标记树突的近端位置提示了皮质内前馈抑制的一个关键位置。
