During embryonic development , the proper ratio of excitatory and inhibitory neurons is established for optimal brain function .

在胚胎发育阶段，兴奋和抑制性神经元的适当比例确立以优化大脑功能。

First , the scientists found abnormal proportions of excitatory and inhibitory neurons in the brains of the embryonic ds mice , with a much higher quantity of the inhibitory cells .

首先，科学家发现唐氏综合症小鼠的胚胎中异常兴奋和抑制性神经元的比例异常，其中抑制性细胞的数量要高得多。

The results suggest that cort preferentially injure the primary cultured hippocampal neurons and the neurotoxic effect of cort be closely related to promoting the release of excitatory amino acids .

实验结果提示，皮质酮可选择性地损伤原代培养海马神经细胞，该毒性作用可能与其增加兴奋性氨基酸释放有关.

They can mediate either excitatory or inhibitory actions in postsynaptic cells and produce electrical changes in the postsynaptic cell that last from milliseconds to many minutes .

它们就能够向突触后细胞发出激动或抑制的信号来改变它的电位，这种电位改变可以在突触后细胞持续几毫秒到几分钟不等。

We show that neuronal persistent activity and tuning curves of delay-period activity ( memory fields ) can be generated by an excitatory feedback circuit and recurrent synaptic inhibition .

神经元持续活动及延迟片段活动的调节曲线（记忆域）可透过刺激的回馈电路与周期性突触抑制而产生。