Made available in DSpace on 2020-12-12T02:16:18Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01; Key points: Contraction of abdominal muscles at the end of expiration during metabolic challenges (such as hypercapnia and hypoxia) improves pulmonary ventilation. The emergence of this active expiratory pattern requires the recruitment of the expiratory oscillator located on the ventral surface of the ...