Keywords: رفلکس سمپاتو-سمپاتیک; surgery; anesthesia; movement; analgesia; pain; nociception; anti-nociception; vasomotor center; RVLM; nucleus ambiguus; cardiac vagal motoneurons; presympathetic neurons; somato-sympathetic reflex; cardiac baroreflex; vasomotor baroreflex; SPI; SSI; ANI;