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. Author manuscript; available in PMC: 2009 Jan 2.
Published in final edited form as: Eur J Neurosci. 2008 Mar 7;27(6):1364–1372. doi: 10.1111/j.1460-9568.2008.06107.x

Fig. 1.

Fig. 1

Basic membrane properties of preadolescent and adult MSNs recorded in the NA. Traces show overlays of whole-cell current-clamp responses to depolarizing and hyperpolarizing current pulses (50-pA steps from −200 to +300 pA, 500 ms duration) in (A) preadolescent and (B) adult rats. Arrows point to the ramp depolarization preceding spikes in both age groups. Bottom left on both panels: I/V plots revealing an inward rectification with depolarizing current pulses, which corresponds to the ramp depolarization indicated by the arrow. Bottom right on both panels: DAB staining of representative MSNs filled with Neurobiotin during recording. Calibration bars, 50 μm.