Table 1.

Intrinsic membrane properties of PPN neurons and layer V cortical pyramidal neurons in the presence of each plastic.

PPN Neurons
	Resting Membrane Potential (mV)	Input Resistance (MOhm)	Membrane Capacticance (pF)	AP Amplitude (mV)	AP Frequency (Hz)
Control n=13	−51±1	364±33	25±2	(n=14) 54±2	23±3
ABS n = 7	−51±2	330±41	25±3	55±4	30±3
PLA n = 9	−56±3	350±39	36±4	(n=8) 63±5	31±7
Nylon 618 n = 8	−58±3	391±31	32±3	55±4	16±3
Nylon 680 n = 10	−66±2***	420±24	28±2	(n=9) 56±4	26±6
T-glase n = 8	−64±2**	409±25	34±4	65±5	24±6
Shapeways n = 11	−55±1	380±16	28±2	62±3	22±4
	F(6,59) =6.26, p = 3.9×10^−5	F(6,59) = .096, p = 0.46	F(6, 59) = 2.16, p = 0.06	F(6,58) = 1.53, p = 0.18	F(6, 58) = 0.99, p = 0.44

LV Cortical Pyramidal Neurons
	Resting Membrane Potential (mV)	Input Resistance (MOhm)	Membrane Capacticance (pF)	AP Amplitude (mV)	AP Frequency (Hz)
Control n=10	−66±1	335±10	92±11	71±4	11±2
ABS n = 10	−69±1	392±10*	69±12	(n=8) 56±3*	25±5**
PLA n = 8	−69±4	316±14	101±9	72±3	16±2
Nylon 618 n = 8	−66±1	358±7	100±6	73±4	17±3
Nylon 680 n = 10	−67±1	328±17	92±4	78±3	15±2
T-glase n = 10	−69±1	356±13	84±6	67±3	16±6
Shapeways n = 11	−63±3	353±17	95±4	(n=10) 69±3	15±4
	F(6,60) = 1.34, p = 0.25	F(6,60) = 3.36, p = 0.006	F(6,60) = 1.97, p = 0.08	F(6,57) = 4.01, p = 0.002	F(6,57) = 2.49, p = 0.03

Note, only significance between plastic and control is marked.

^*P<0.05;

^**P<0.01;

^***P<0.001.