Assessment of the Efficacy and Safety of EESS in Patients With Incomplete Spinal Cord Injuries

Inclusion Criteria: * Aged between 18 and 65 years inclusive * Male or female * Incomplete ASIA B or C spinal cord lesion with level of lesion located above T10 (sensation preserved below level of lesion) * Absence of significant motor deficit of the upper limbs or recovered motor deficit (muscular score ≥ 4/5) * Patient with spinal cord injury at least 2 years old and considered stable not walking * Spinal cord lesion determined by spinal cord MRI (intramedullary hypersignal) * Patient who can benefit from an iterative rehabilitation programme * Patient with stable health condition with no cardiopulmonary disease * Patient with orthopaedic condition compatible with verticality and walking * Persistence of adductor reflexes up to L2 * Patient with no current neuromodulation implant: spinal cord neurostimulator, brain, peripheral nerve or intrathecal treatment * Patient with no coagulopathy, cardiac risk factors or other medical risk factors significant for surgery * Local anatomical conditions compatible with implantation of the epidural electrode (determined by MRI of the spinal cord) * Person who benefits from or is entitled to a social security scheme * Having provided signed informed consent Exclusion Criteria: * Significant cerebral lesion on a previous cerebral MRI * Psychiatric or cognitive disorder history (known or detected during the consultation with the psychologist) * Protected adult patients * Pregnant (determined by a negative pregnancy test) or breastfeeding women * Respiratory failure (vital capacity \< 50%) (surgery in prone position) * Repeated urinary infections (≥3 per year) * Planned absence that may hinder participation in the study (travelling abroad, relocation, imminent moving) * Patients with spasms (PENN scale \> 2) * Cauda equina syndrome * Patients presenting with a contraindication to an MRI being carried out: i) pacemaker, ii) non-MRI-compatible heart valve, iii) clips, stents, coils, etc. that are not MRI-compatible, iv) cochlear implant, v) metal foreign body, etc.) * Patients presenting with a contraindication to MEPs being carried out (notably wearing of ferromagnetic material, heart stimulator) * Patients on oral anticoagulants * Patients with botulinic toxin injection * Patients with bedsore * Undernourished patients (BMI \< 19)