Unformatted text preview: reduction of pain (analgesia). The same opiate systems mediate the analgesic effect of stress. You have areas in the brain responsible for stopping pain. Send axons down spinal cord and these ones inhibit pain signals from continuing to climb up spine to brain. EX: car crash, don’t feel pain til a day later. In war, not feeling bullet, but thinking it’s water and not blood running down leg. • Endogenous opiates ( endorphins ) increase the activity of PAG neurons that stimulate serotonergic neurons in the raphe nuclei. The serotonin output Cingulated cortex part of the limbic system-responsible for emotions....
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- Winter '10