title: Cerebrospinal fluid GABA as an index of brain GABA activity.
mesh_terms: D000328:Adult; D000368:Aged; D001921:Brain / Q000378:metabolism*; D002336:Carnosine / Q000031:analogs & derivatives / Q000134:cerebrospinal fluid; D006801:Humans; D008875:Middle Aged; D009435:Synaptic Transmission; D005680:gamma-Aminobutyric Acid / Q000134:cerebrospinal fluid*
chemical_list: C005038:homocarnosine; D005680:gamma-Aminobutyric Acid; D002336:Carnosine