“…During a cough, the expiratory muscles contract in a synchronic way, causing the rise of the intra-abdominal pressure and, consequently, the increase in the peak expiratory flow (Mccool, 2006) and the peak cough flow (Cardoso et al, 2012;Chan, Jones, Chung, & Hung, 2010;Kang, Kang, Sohn, Park, & Moon, 2006). However, some clinical conditions, such as the spinal cord injury (SCI), may alter the neuromotor physiology of coughing and contribute to the emergence of respiratory dysfunctions, due to the inability of respiratory muscles to generate efficient contractions (Dicpinigaitis, Grimm, & Lesser, 1999;Kowalski & Dimarco, 2011). In this condition, the motor level of the spinal cord lesion can determine the functional state of the SCI, that is, which motor functions are intact and which were partially or completely lost.…”