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. 2014 May 6;8:155. doi: 10.3389/fnbeh.2014.00155

Figure 1.

Figure 1

VTA protein expression, optic fiber placements, and pulse-train parameters. (A) A photomicrogram showing representative EYFP expression with the placement of an optic fiber (dotted line). Abbreviations: cp, cerebral peduncle; IPN, interpeduncular nucleus; SNR, substantia nigra pars reticulata; VTA, ventral tegmental area. (B) Pulse duration, intensity, frequency, and number of a photo-pulse trains varied.