Inclusion Criteria:  Minor patients between 10 and <18 years old, presenting a neuromuscular pathology, with progressive scoliosis, to undergo for their clinical care a fusionless surgery based on a bipolar spine construct, performed by a minimally invasive approach Minor patients between 10 and <18 years old, presenting a neuromuscular pathology such as encephalopathy / infantile spinal amyotrophy / myopathy, without progressive scoliosis Minor patients between 10 and <18 years old, healthy controls, followed in orthopedics for a pathology other than neuromuscular or spinal deformity Written informed consent  Exclusion Criteria:  No social insurance Severe mental retardation or severe dystonia making data acquisition impossible or requiring sedation Patients with gastrostomy or tracheostomy