We will conduct a monocentric prospective open study of 56 SCI patients (SCI level ranging from C5 to T8 ASIA A or B) with a recent lesion (<4 months). The evolution of respiratory function and dyspnea with and without corset use will be studied over a 2 years period. An evaluation of spasticity overtime will also be conducted. After randomization (corset use or not) evaluation will be conducted after 3 months, 6 months, 1 year and 2 years and will include: pulmonary function test with and without corset in the upright position and in the supine position, blood gases, dyspnea scores in the different positions and spasticity assessment.