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The efficacy of coma stimulation therapy is controversial. Researchers and medical professionals have differing opinions on the effectiveness of sensory stimulation.  Listed below are  the advantages and disadvantages to implementing a coma stimulation program. Adapted from:  Malec, J.F. (1996)   Advantages   May give the family hope   Allows the family to take an active role in the treatment process   May decrease the distress of the family   May help decrease the family's feelings of loss, anger, and denial   May shorten duration of coma   Disadvantages   May raise false hopes   May reinforce denial of patient's deficits   May create additional emotional/financial stress within the family   Lack of specific procedures to follow for coma stimulation treatment   No set criteria for determining the frequency, intensity, type, and duration for stimulation   Overstimulation may prolong vegetative state

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