所有的单元对运动条纹刺激都失掉了方向选择性，这些现象的机理可能是由于ECMA去除了胆碱能无足细胞所致。
It was discussed that the mechanism underlying the disappearance of the transient responses and of the directional selectivity of ganglion units might be due to elimination of the cholinergic amacrine cells with ECMA .
无足细胞