1. Campos RJ, Dimitrijevic MM, Faganel J, Sharkey PC (1981) Clinical evaluation of the effect of spinal cord stimulation on motor performance in patients with upper motor neuron lesions. Appl Neurophysiol 44:141–151
2. Chohadon F, Richer E (1993) Stimulation cerebrale profonde chez des patients etat vegetatif post traumatique. Neurochirurgia 39:281–292
3. Fujii M, Sadamitsu D, Maekawa T, Uesugi S, Ozaki S, Koizumi S et al (1998) Spinal cord stimulation therapy at an early stage for unresponsive patients with hypoxic encephalopathy. No Shinkei Geka 26:315–321 (Jpn, with Eng abstract)
4. Funahashi K, Komai N, Ogura M, Kuwata T, Nakai M, Tsuji N (1989) Effects and indications of spinal cord stimulation on the vegetative syndrome. No Shinkei Geka 17:917–923 (Jpn, with Eng abstract)
5. Giacino JT, Ashwal S, Childs N, Cranford R, Jennett B, Katz DI et al (2002) The minimally conscious state: definition and diagnostic criteria. Neurology 58:349–353