Acupuncture treatment for patients with chronic disorder of consciousness and severe cognitive disorder (higher brain dysfunction) following traffic traumatic brain injury

INTERVENTION: Acupuncture (2 session per week, 4 months,1 or 2 course) CONDITION: Chronic disorder of consciousness or severe cognitive disorder (higher brain dysfunction) following traumatic brain injury PRIMARY OUTCOME: Coma Recovery Scale, NASVA score; (Before and after treatment period); Motor evoked potential using transcranial magnetic stimulation; Evoked electromyography (F wave, H reflex); (Comparison of changes in variables in treatment and no treatment) SECONDARY OUTCOME: Range of motion, Modified Ashworth Scale; Electroencephalogram; Heart Rate Variability; Records of changes in the clinical symptoms INCLUSION CRITERIA: Patients with chronic disorder of consciousness following traumatic brain injury or higher brain dysfunction (severe cognitive disorder), who admitted in Chubu Medical Center for Prolonged Traumatic Brain Dysfunction. At least three months after injury.