case_images: PMC8216342_01
case_images: Possible mechanism of tramadol in the pathophysiology of hiccups.
case_images: 10.1177_20420986211021230-fig3.jpg
case_images: PMC8216342_01_10.1177_20420986211021230-fig3.jpg
case_images: fig3-20420986211021230
case_images: Consequently, the increase in norepinephrine could also stimulate the reflex arc of hiccups and could lead to contractions of skeletal muscle, including the diaphragm   (Figure 3).