single motor unit potentials from the eighth internal intercostal ( iic ) muscle were recorded along with tracheal pressure and end-tidal co2 ( petco2 ) in spontaneously breathing , dial-urethane anesthetized cats during hypercapnia ( 3 , 5 , or 7 % co2 ) and during lung inflation ( li , 100 ml above functional residual capacity ) before and after vagotomy .
C0035203
breathing
C0024109
lung