These results show that PAG is an important site not only for the analgesic action of morphine but also for the antagonistic analgesic effect of naloxone.
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- 由此可见PAG既是侧脑室注射吗啡镇痛作用的重要中枢部位,又是侧脑室注射纳洛酮拮抗吗啡镇痛的重要中枢部位。