Table 1Cellular properties of spiny projection neurons in three strains of rat
Cellular property
WI (n=24)
SHR (n=24)
WKY (n=23)
AP threshold (mV)
−52.1(6.6)
−54.0(6.4)
−51.0(4.3)
AP amplitude (mV)
74.8(8.1)
76.5(7.5)⁎
70.1(8.7)⁎
AP half-duration (ms)
0.63(0.11)
0.60(0.09)⁎
0.67(0.06)⁎
AP firing latency (ms)
72.7(11.1)
75.6(10.8)
73.6(11.7)
AHP amplitude (mV)
11.5(3.1)
12.6(3.6)
11.6(3.1)
Current required to elicit single-delayed AP (nA)
0.72(0.32)
0.68(0.28)
0.79(0.30)
Input resistance (MΩ)
38.9(13.5)
41.2(15.3)
36.8(16.2)
DOWN state MP (mV)
−83.9(9.7)
−85.9(8.0)
−85.8(7.6)
UP state MP (mV)
−68.5(10.0)
−66.6(8.6)
−68.1(9.1)
Spontaneous action potential firing rate (Hz)
1.6(2.1)
1.6(1.8)
1.5(2.1)
Values are means with standard deviations in parentheses. AP parameters correspond to those values obtained form current-evoked AP. Other cellular properties were measured from spontaneous traces or responses to current injection. AP, action potential; MP, membrane potential.⁎P<0.05, one-way ANOVA.
