In epidural analgesia morphine acts by acting on -: (A) Substantia gelatinosa, (B) Axons, (C) Ventral horn, (D) Sensory nerve
Answer is A. Ans. is 'a' i.e., Substantia gelatinosa o Analgesic action of morphine has spinal and supraspinal components. It acts in the substantia gelatinosa of dorsal horn to inhibit release of excitatory transmitters from primary afferent carrying pain impulses.