Table 1.

Electrophysiological properties of striatal medium spiny neurons

Action potential amplitudea	42.6 ± 1 mV
Membrane potential, Down (mV)	86.1 ± 2.1
Membrane potential, Up (mV)	72.4 ± 2.2
Input resistance b (MΩ)	56.1 ± 3.7
dPSP amplitude (mV)	12.6 ± 1.8
dPSP latency (to the peak) (ms)	18.0 ± 0.9

Late response to cortical stimulation	Slow wave ECoG	Activated ECoG
Long latency hyperpolarization duration (ms)	396 ± 35c	290 ± 32
Late depolarization latency (ms)	439 ± 33	340 ± 32
Coefficient of variation of late depolarization latency	0.41 ± 0.03d	0.20 ± 0.05

^aMeasured from threshold

^bmeasured during the Down state by applying hyperpolarizing current pulses (see Tseng et al. 2001 for details). Data are mean ± s.e.m.

^cP = 0.05

^dP = 0.003, versus activated ECoG condition, t test.