Research on Wireless Brain Implant System for General Control of External Devices

Inclusion Criteria: * Aged 18-80 years (inclusive), any gender. * Diagnosed with spinal cord injury, brainstem stroke, amyotrophic lateral sclerosis, or other motor neuron diseases causing partial or complete paralysis, or bilateral upper limb amputation. * Diagnosis stable for at least 6 months before screening, with the condition present for at least 1 year. * Willing to follow the study protocol and attend all visits, with or without caregiver assistance. * Informed consent signed by participant and/or caregiver, with full understanding of the trial's purpose. Exclusion Criteria: * Previous implantation of metal objects or devices (except dental implants or non-impacting implants). * Long-term use of anticoagulants/antiplatelets with insufficient cessation, or abnormal coagulation test results. * Unable to tolerate anesthesia or surgery. * Severe neurological disorders or brain injury leading to significant dysfunction. * Scalp conditions that may impair wound healing. * Acute or severe infections. * Cognitive impairment or psychiatric disorders. * Severe dysfunction of vital organs, malignancies, or autoimmune diseases. * Life expectancy under 1 year. * Drug or alcohol abuse. * Pregnant, breastfeeding, or planning pregnancy during the study. * Other conditions deemed unsuitable by the investigator.