FIG. 4.

l-Arginine increases sIPSC frequency. A: histograms illustrating sIPSC frequency and amplitude from a dLGN relay neuron and the response to l-arginine (1 mM, 2 min). TTX (0.5 µM) was present throughout the recording. B: representative traces of a voltage-clamp recording shown at a faster time base to illustrate the sIPSCs. Traces illustrate sIPSC activity before and after l-arginine application, wash, and in SR95531 (10 µM). C: population data illustrating the effect of l-arginine on sIPSC amplitude and frequency (n = 24 neurons).