Keywords: CGP; CGP 35348; ECF; extracellular fluid; GABAAR; GABAA receptor; GABABR; GABAB receptor; GLNECF; extracellular glutamine; GLUECF; extracellular glutamate; HC; hippocampus; Extracellular glutamine; Extracellular glutamate; Disinhibition; Rat hippocampus;