Table 2.

Properties of inhibitory and excitatory synaptic connections between L4 BIns and L4 spiny neurons

Parameter	IPSPs (n = 13) mean ± SD	EPSPs (n = 6) mean ± SD
Postsynaptic Vm (mV)*	−55.0 ± 0.2	−69.7 ± 2.7
PSP amplitude (mV)	0.93 ± 0.81	1.8 ± 1.7
CV of PSP amplitude	0.49 ± 0.25	0.34 ± 0.09
Failure rate (%)	14 ± 17	7 ± 9
Latency (ms)**	0.5 ± 0.1	1.0 ± 0.3

IPSPs were recorded at BIn–L4 spiny neuron connections at a membrane potential of −55 mV; EPSP were recorded at reciprocal L4 spiny neuron–BIn connection at resting membrane potential.

*Baseline membrane voltage for recording of IPSPs in postsynaptic L4 spiny neurons was set to a potential of −55 mV (see Materials and Methods section). The calculated IPSP amplitude at the resting membrane potential was 0.68 ± 0.82 mV.

**P < 0.001.