| Heart rate and respiration was monitored through thoracic needle electrodes coupled to a hi-gain coupler and an impedance pneumograph coupler, respectively. |
| A pneumograph tube goes around the torso to measure breathing. |
| A pneumograph tube is fastened around the subject's chest, and a blood pressure pulse cuff is strapped around the arm. |
| These are used for electrical connections and for connections with the manometer, stethoscope, and pneumograph. |
