Table 1.

Composition of extracellular and pipette solutions (in mm)

	Extracellular solutions				Pipette solutions
	2 K⁺	5 K⁺	8 K⁺	10 K⁺	4.5 mm [A⁻]	15 mm[A⁻]
NaCl	156	153	150	148		3.5
CsCl	1 (5)^1-a	1	1	5
KCl	2	5	8	10		5
K-glucuronate					140	130
CaCl₂	2	2	2	2	0.25	0.25
MgCl₂	1	1	1	1		0.5
Mg-ATP					2	2
Glucose	15	15	15	15	10	10
HEPES	10	10	10	10	10	10
EGTA					5	5
QX 314-Br⁻					4	5

↵F1-a CsCl (5 mm) and K⁺ (10 mm) were used only to recordI_GABA but not to record sIPSCs to avoid too strong depolarization of network neurons.