摘要
Electrophysiological studies have shown that acetylcholine may be one of the neurotransmitters in the nucleus isthmi (NI) of amphibians and reptiles, but little (in amphibians) or nothing (in reptiles) is known about the distribution of its hydrolase,acetylcholinesterase (AChE), within NI. However, abundant AChE is a necessary con-
