Table 1. Basic Membrane Properties from NAc^shell MSNs of Paired and Unpaired Mice Following Cocaine and Extinction Memory Retrieval.

NAc shell	Conditioned locomotion				Extinction
	Unpaired		Paired		Unpaired		Paired
	GFP−	GFP+	GFP−	GFP+	GFP−	GFP+	GFP−	GFP+
Resting Vm (mV)	−70.63±0.80	−71.00±0.93	−70.19±0.46	−68.80±0.41	−71.06±0.49	−70.56±0.52	−70.39±0.39	−70.87±0.85
Rheobase (pA)	115.63±11.78	110.71±12.84	116.88±6.74	134.33±30.50	115.00±12.38	107.22±12.34	108.75±9.99	92.14±13.35
Ri (MΩ)	207.34±22.89	228.63±28.97	200.22±15.06	223.86±53.98	185.38±16.30	223.48±25.07	205.65±19.12	260.76±33.26
AP peak (mV)	68.21±3.88	70.46±2.30	69.53±2.01	66.99±2.31	71.99±2.99	68.14±4.32	70.39±0.96	72.11±3.07
AP half-width (ms)	1.40±0.06	1.55±0.14	1.41±0.08	1.42±0.09	1.32±0.03	1.38±0.04	1.34±0.04	1.45±0.05
Threshold (mV)	−35.83±1.58	−36.59±0.99	−35.47±0.81	−34.17±0.87	−36.95±0.88	−35.63±1.26	−36.26±0.34	−38.72±1.21
fAHP (mV)	−6.72±0.57	−6.81±0.89	−8.30±0.49	−6.86±0.24	−7.75±0.73	−7.60±0.56	−6.92±0.39	−7.16±0.88
mAHP (mV)	−8.01±0.50	−7.61±0.65	−7.88±0.35	−7.64±0.53	−7.83±0.35	−8.48±0.56	−7.15±0.38	−7.71±0.79

Data are expressed as mean±SEM. Liquid junction potential was −13.7 mV and was not adjusted for. Spike characteristics were determined from the first action potential (AP) of spike runs consisting of six to eight spikes. Input resistance was calculated from the slope of the I/V curve measured in response to 10 pA current steps ranging from −30 to 70 pA. Spike threshold was measured using the third differential method (Cotel et al, 2013) with Mini Analysis software. The AP peak was calculated as the difference between the AP peak and AP threshold. Half-width was measured as the AP width at half-maximal spike. Post-spike fAHPs and mAHPs were measured 3 and 30 ms following the AP threshold, respectively, similar to (Ishikawa et al, 2009).