Evaluation of the NEUROSWING Orthosis on Walking Speed in a Population With Dorsal and/or Plantar Flexor Deficits, With a View to a Reimbursement Application

Inclusion Criteria: * 18 years of age and older * Deficit of the dorsal and/or plantar flexors with at least one of the following components specific to the indication of an AFO: * steppage * foot drop, * spasticity, * failure to transfer weight-bearing, * instability of weight-bearing phase * compensatory hyperextension of the knee * Muscular deficiency of the dorsal and/or plantar flexors principal or accessory * Ambulation possible with or without technical aids * First time using an orthosis used in the study * Being followed in one of the investigating centers whose management and rehabilitation in line with the study's visit schedule. * Having freely consented to participate * Affiliated with a social security scheme Exclusion Criteria: * Cognitive disorders, at the investigator's discretion, impacting the reliability of the clinical tests under study. * Pathology in progressive phase at the time of inclusion that could significantly impact walking (e.g. MS, ALS, etc.) during the entire study period. * Medically unstable (e.g. severe cardiovascular disorders) as judged by the investigating physician. * Behavioral disorders (opposition, agitation, dementia) which, according to the investigator's judgment, would have an impact on walking. * Already fitted with a carbon or NEUROSWING orthosis. * Height over 214cm * Weight over 193kg * Pregnant, parturient or breast-feeding women * Person deprived of liberty by a court order (including guardianship, curatorship and safeguard of justice) or administrative order * Person under psychiatric care or admitted to a health or social establishment for purposes other than research * Person in an emergency situation unable to give consent beforehand