[1]Levin H S, Saydjari C, Eisenberg H M, et al . Vegetative state after closed-head injury. A traumatic coma data bank report[J]. Arch Neurol, 1991, 48(6): 580-585.
[2]Bleck T P. Levels of consciousness and attention. In: Goetz C G, editor. Textbook of clinical neurology[M]. 2nd ed. Philadelphia: Saunders. 2003:1-18.
[3]Notermans S L. Measurement of the pain threshold determined by electrical stimulation and its clinical application. II. Clinical application in neurological and neurosurgical patients [J]. Neurology, 1967, 17(1): 58-73.
[4]Liu J T, Tan W C, Liao W J. Effects of electrical cervical spinal cord stimulation on cerebral blood perfusion, cerebrospinal fluid catecholamine levels, and oxidative stress in comatose patients [J]. Acta Neurochir Suppl, 2008, 101:71-76.
[5]Ragnarsson K T. Functional electrical stimulation after spinal cord injury: current use, therapeutic effects and future directions [J]. Spinal Cord, 2008, 46(4): 255-274.
[6]Shah S A, Schiff N D. Central thalamic deep brain stimulation for cognitive neuromodulation - a review of proposed mechanisms and investigational studies [J]. Eur J Neurosci, 2010, 32(7): 1135-1144.
[7]Schiff N D, Giacino J T, Kalmar K, et al . Behavioural improvements with thalamic stimulation after severe traumatic brain injury[J]. Nature, 2007, 448(7153): 600-603.