Appendix Figure. Panel A reflects the clinical understanding of cough in 1977; Panel B indicates the current understanding. Experimental physiologists have shown that involuntary coughing is entirely a vagal phenomenon, and the large body of clinical experimental data that has accumulated over the past 20 year supports this view. Closed circles = receptors; bullseye = cough center; GN = glossopharyngeal nerve; PN = phrenic nerve; TN = trigeminal nerve; VN = vagus nerve; ?N = possible cortical input; N = cortical input. (Panel A reproduced with permission from reference , , 1977; 137:1186-91, copyright 1977, American Medical Association. Panel B reproduced from reference , , 2000; 108:126S-30S, with permission from Excerpta Medica, Inc.).
Schematic representations of the anatomy of the afferent limb of the cough reflex.8Archives of Internal Medicine9American Journal of MedicineGrahic Jump Location