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Dramatically depicts a traumatic leg injury resulting in reflex sympathetic dystrophy (RSD0 with a subsequent treatment . The pain pathway of RSD, also known as Complex Regional Pain Syndrome, or CRPS, is shown originating in the knee, following a course to the brain, triggering a sympathetic inflammatory response of the blood vessels in the leg, resulting in pain, swelling and skin mottling.  Also displays a nerve block injection of anesthetic into the sympathetic chain ganglia in the lumbar region.