Table 1.

Electrophysiological characteristics of fate-mapped neocortical neurons

	Mean non-Tbr2	SD	SEM	Mean Tbr2	SD	SEM	p value
Vr (mV)	−69.5	5.3	1.1	−66.2	5.8	1.2	0.049*
Rn (MOhm)	106.6	36.7	7.6	150.2	65.1	13.0	0.006*
Tau (ms)	16.4	6.2	1.3	18.7	8.6	1.7	0.292
Rheobase (pA)	205.0	63.9	13.3	141.2	58.2	11.9	0.0008*
Threshold (mV)	−32.9	3.7	0.8	−36.1	4.7	0.9	0.012*
Amp (pA)	81.3	8.0	1.7	82.4	9.1	1.8	0.667
Duration at 1/2 (ms)	2.2	0.7	0.1	2.1	0.5	0.1	0.676
Sag (mV)	1.2	0.8	0.2	2.5	2.2	0.4	0.007*
RD (mV)	1.2	0.8	0.2	2.2	1.7	0.3	0.009*
Hump (mV)	2.1	1.3	0.3	2.2	2.2	0.4	0.803
AHP (mV)	−12.7	2.5	0.5	−11.5	4.4	0.9	0.231
fAHP (mV)	−4.8	2.5	0.5	−5.3	2.6	0.5	0.517
DAP (mV)	0.4	1.0	0.2	0.5	0.9	0.2	0.602
mAHP (mV)	−7.8	1.9	0.4	−6.7	2.1	0.4	0.054*
tAHP (ms)	42.5	10.6	2.2	41.4	11.2	2.2	0.707
Frequency @ steady state near rheobase	6.94	4.9	1.0	6.88	6.6	1.3	0.975
Frequency @ steady state 200pA step	4.6	4.4	0.9	10.1	6.3	1.3	0.0012*
Increase in FF per 50 pA current step	0.05	0.02	0.01	0.08	0.03	0.01	0.002*
TFS (time to 1st spike, ms)	46.8	31.9	7.5	43	29	6.2	0.689
ISI 1 (ms)	82.4	54.6	12.8	78.4	51.2	10.9	0.810
ISI 2 (ms)	108.4	60.6	14.3	99.7	52.9	11.3	0.627
ISI 3 (ms)	115	71.9	16.9	103.3	51.9	11.1	0.544
FFA initial (%)	27.8	20.6	4.9	26.2	21.7	4.6	0.812
FFA late (%)	40.7	18.1	4.5	38.8	20.1	4.3	0.763
SEPSC
Freq (Hz)	6.7	2.4	0.5	6.4	2.5	0.6	0.696
Amp (pA)	16.6	4.0	0.9	20.5	7.2	1.7	0.044*
Rise (ms)	1.8	0.4	0.1	1.6	0.3	0.1	0.185
Half-width (ms)	8.5	0.8	0.2	9.3	1.2	0.3	0.015*
Decay (ms)	5.9	0.6	0.1	7.1	1.2	0.3	0.001*
Area (pAms)	−174.2	48.8	10.9	−255.9	114.4	26.2	0.008*

*Denotes statistical significance.