Brain Controlled Spinal Cord Stimulation in Participants With Cervical Spinal Cord Injury for Upper Limb Rehabilitation

* Must provide Informed Consent as documented by signature (Appendix Informed Consent Form), * Must be at least 18 years old and no older than 75 years old at the time of enrolment, * Must be suffering from non-progressive traumatic cervical spinal cord injury, * Must be graded A, B, C, or D in the American Spinal Injury Association (ASIA) Impairment Scale (AIS) classification, * Must have completed primary standard of care rehabilitation, * Must be severely impaired in his upper limb function as determined by the investigator, * Must have sustained the injury at least 6 months before signing the consent form, * Must be able to understand and interact with the study team in French or English, * Must agree to comply in good faith with all conditions of the study and to attend all scheduled appointments, * Must use safe contraception for women of childbearing capacity, * Must not be pregnant nor breast feeding, * Must not have history of severe autonomic dysreflexia, * Must not have brain damage, * Must not have history of epilepsy, * Must not have spinal stenosis, * Must not have gastrointestinal ulcers in the last five years, * Must not have any psychological disorder, * Must not have the intention to become pregnant during the course of the study, * Must not be known or suspected of drug or alcohol abuse, * Must not have participated in another clinical study using drugs or medical devices within the 30 days preceding and during the present study, * Must not have previously been injected with stem cells in the spinal cord, * Must not be the investigator himself, his/her family members, employees or other dependent persons, * Must not have any unstable or significant medical condition that is likely to interfere with study procedures or likely to confound study endpoint evaluations as determined by the Investigator, * Must not have any hematological disorders with increased risk for surgical intervention, * Must not require ventilator support, * Must not suffer from spinal cord injury from other etiology than traumatic (ischemic, tumoral, autoimmune, etc), * Must not be subject to spasms that limit the ability of the subject to participate in the study training as determined by the investigator, * Must not display spinal stenosis or post traumatic damage at location of implantation, * Must not require the use of an intrathecal baclofen pump, * Must not be implanted with a device such as pacemakers or defibrillators, * Must not have any indication that would require an MRI, * Must not suffer from congenital nor acquired upper limb abnormalities (affection of joints or bones).