Table 1.

Electrophysiological properties of bushy neurons.

		Ia-D			Non-Ia-D			p value (unpaired t-test or Mann Whitney test)
		n	mean	SD	n	mean	SD
Young	resting potential (mV)	25	−65.2	2.4	24	−67.2	2.6	0.0075**
	input resistance (MΩ)	25	60	23	24	67	38	0.851
	threshold spike amp (mV)	25	27.8	5.4	24	38.3	12.4	0.0007***
	threshold current (pA)	25	203	84	24	326	193	0.025*
	spikes per stim at 100 Hz	25	0.50	0.31	24	0.23	0.33	0.0014**
	adaptation index at 100 Hz	25	0.47	0.31	24	0.21	0.34	0.0004***
	vector strength at 100 Hz	25	0.993	0.004	24	0.985	0.015	0.030*
	spike jitter at 100 Hz (ms)	25	0.180	0.060	24	0.257	0.126	0.030*
	spikes per stim at 400 Hz	23	0.068	0.080	21	0.016	0.042	< 0.0001****
	adaptation index at 400 Hz	23	0.17	0.22	21	0.02	0.05	< 0.0001****
	vector strength at 400 Hz	22	0.74	0.15	9	0.73	0.15	0.823
	spike jitter at 400 Hz (ms)	22	0.344	0.181	9	0.347	0.164	0.781
Middle-aged	resting potential (mV)	23	−65.5	1.6	8	−66.0	1.9	0.449
	input resistance (MΩ)	23	58	17	8	58	13	0.982
	threshold spike amp (mV)	23	28.2	6.5	8	35.5	12.9	0.049*
	threshold current (pA)	23	205	84	8	338	136	0.0005***
	spikes per stim at 100 Hz	23	0.50	0.34	8	0.26	0.36	0.080
	adaptation index at 100 Hz	22	0.48	0.34	5	0.32	0.35	0.306
	vector strength at 100 Hz	20	0.995	0.003	5	0.982	0.020	0.0074**
	spike jitter at 100 Hz (ms)	20	0.166	0.069	5	0.279	0.142	0.015*
	spikes per stim at 400 Hz	22	0.05	0.10	8	0.01	0.02	0.030*
	adaptation index at 400 Hz	20	0.035	0.049	5	0.002	0.005	0.025*
	vector strength at 400 Hz	19	0.806	0.082	4	0.679	0.157	0.138
	spike jitter at 400 Hz (ms)	19	0.267	0.079	4	0.381	0.155	0.188
Old	resting potential (mV)	29	−65.3	2.5	6	−66.2	2.6	0.445
	input resistance (MΩ)	29	72	33	6	72	36	0.982
	threshold spike amp (mV)	29	28.5	4.8	6	36.0	8.1	0.0047**
	threshold current (pA)	29	185	94	6	254	145	0.273
	spikes per stim at 100 Hz	29	0.38	0.32	6	0.06	0.08	0.019*
	adaptation index at 100 Hz	24	0.37	0.30	4	0.02	0.02	0.0007***
	vector strength at 100 Hz	23	0.986	0.010	3	0.959	0.039	0.182
	spike jitter at 100 Hz (ms)	23	0.257	0.118	3	0.420	0.241	0.211
	spikes per stim at 400 Hz	29	0.026	0.037	5	0.001	0.001	0.018*
	adaptation index at 400 Hz	24	0.098	0.144	3	0.018	0.031	0.230
	vector strength at 400 Hz	21	0.689	0.179	3	0.808	0.158	0.271
	spike jitter at 400 Hz (ms)	21	0.361	0.154	3	0.247	0.131	0.172