CAN-PRIME: Precise Robotically Implanted Brain-Computer Interface for the Control of External Devices

Inclusion Criteria: * Severe quadriplegia (tetraplegia) due to spinal cord injury or amyotrophic lateral sclerosis (ALS) for at least 1 year without improvement, where quadriplegia is defined as having very limited or no hand, wrist, and arm movement and all levels below * Life expectancy ≥ 12 months. * Ability to communicate in English * Presence of a stable caregiver Exclusion Criteria: * Moderate to high risk for serious perioperative adverse events * Active implanted devices * Morbid obesity (Body Mass Index \> 40) * History of poorly controlled seizures or epilepsy * History of poorly controlled diabetes * Requires magnetic resonance imaging (MRI) for any ongoing medical conditions * Acquired or hereditary immunosuppression * Use of smoking tobacco or other tobacco products * Psychiatric or psychological disorder * Brain MRI demonstrating hemorrhage, tumor, distorted or adverse anatomy. * Any condition which, in the opinion of the Investigator, would compromise your ability to safely participate in the study or undergo the implantation procedure