All SCN neurons make this inhibitory neurotransmitter, and it had been shown that giving GABA daily at 8 a.m. to SCN cells synchronizes them.

• 所有SCN区域的神经元都可以产生这种神经递质，有实验证实每天早晨八点钟向SCN区细胞释放GABA能使它们同步化。