脑及其功能是生物科学中最有趣,同时也是最复杂的问题。中枢神经系统传递信息和接受信息的作用机制迄今仍然是个难题。脑功能是由许多生物化学和生物物理过程所作用的结果,神经递质在神经元和突触的传递中起着决定性的作用。已知脑内有许多活性物质参与脑功能的活动。特异性的神经递质可由下述典型指标加以确定: The brain and its functions are the most interesting and complex issues in the biological sciences. The mechanisms by which the central nervous system transmits and receives information have so far remained a dilemma. Brain function is the result of many biochemical and biophysical processes that play a decisive role in the transmission of neurons and synapses. It is known that many active substances in the brain are involved in brain function. Specific neurotransmitters can be determined by the following typical indicators: