Objectives: (1) To check music or voice message influence on vital signs, facial expressions or muscular tonus of coma, vegetative or sedated patients; (2) To connect the existence of patient's responsiveness with the Glasgow Coma Scale or with the Ramsay Sedation Scale; (3)To evaluate the relation between the response and the score of Glasgow Outcome Scale.

Inclusion Criteria:

• To be in disorder of consciousness;
• To be evaluated according to one of the Scales and to have a score in the study range: in physiological comas, score between 3 to 8 Glasgow Coma Scale (GCS); in induced coma, one of the last two scores of Ramsay Sedation Scale (RSS), R5 or R6;
• To have hearing function preserved according to family;
• To have written consent from the family or responsible party for the patient's participation

Exclusion Criteria:

• Score between 9 to 15 in GCS or scores R1, R2, R3 or R4 in RSS