Pain, enkephalin and acupuncture.
D015670:Acupuncture Therapy; D001933:Brain Stem / Q000502:physiology; D004723:Endorphins / Q000502:physiology*; D004745:Enkephalins / Q000502:physiology*; D009020:Morphine / Q000494:pharmacology; D009433:Neural Inhibition; D010146:Pain / Q000503:physiopathology*; D011957:Receptors, Opioid / Q000502:physiology*; D013116:Spinal Cord / Q000502:physiology; D009435:Synaptic Transmission / Q000187:drug effects
D004723:Endorphins; D004745:Enkephalins; D011957:Receptors, Opioid; D009020:Morphine