??? ?? ?? ?? ???? ????? ????? ??? ?? ???? ???? ????? ??????? ?????? ???? ??, ?????? ????? ?? ?? ??????????? ??????? ???? ??.The two neurotransmitters which can be most generally present in the vertebrate brain are glutamate, which almost always exerts excitatory results on focus on neurons, and gamma-aminobutyric acid (GABA), and that is nearly alw