Figure 4: Response induced of injection of NG-Nitro-L-arginine Methyl Ester (L-NAME) (0.3-3 μg/rat, intra-central amygdala [CeA]) prior to L-arginine (1 μg/rat, intra-CeA) prior to naloxone injection (0.4 mg/kg, intraperitoneally [i.p.]) on day of testing of morphine response. The NO synthase inhibitor, L-NAME, was microinjected into the nucleus, promptly after which the NO precursor, L-arginine, was microinjected (intra-CeA). After that the narcotic drug, naloxone (0.4 mg/kg, i.p.) was injected. Then 10 min later the response was measured. Control group solely received saline instead of L-NAME. Data are expressed as number of behaviors/15 min ± standard error of mean
![Figure 4: Response induced of injection of N<sup>G</sup>-Nitro-L-arginine Methyl Ester (L-NAME) (0.3-3 μg/rat, intra-central amygdala [CeA]) prior to L-arginine (1 μg/rat, intra-CeA) prior to naloxone injection (0.4 mg/kg, intraperitoneally [i.p.]) on day of testing of morphine response. The NO synthase inhibitor, L-NAME, was microinjected into the nucleus, promptly after which the NO precursor, L-arginine, was microinjected (intra-CeA). After that the narcotic drug, naloxone (0.4 mg/kg, i.p.) was injected. Then 10 min later the response was measured. Control group solely received saline instead of L-NAME. Data are expressed as number of behaviors/15 min ± standard error of mean](articles/2014/46/1/images/Indian J Pharmacol_2014_46_1_57_125169_f4.jpg)