[The value of the study of brain stem reflexes in coma (author's transl)].

A better clinical assessment of the comatose state is obtained by the study of brain stem reflexes. Systematic research of the fronto orbicular, pupillar, corneal, masseteric, vestibulo-ocular, oculo-cardiac, palmo-mental and cornéo mandibular reflexes has enabled characterization of functional levels. Degree of comatose stade and other usual physical symptoms have been correlated. Hence brain stem injury and course is followed in acute coma. Six functional levels permit assessment of cranio-caudal disintegration of brain stem functions. According to our opinion, diencéphalo-mesencephalic level is of bad prognosis in the course of follow-up.