Galvanic vestibular stimulation to improve postural instability, voluntary attention, and quality of life in Parkinson's disease patients

ABSTRACT Galvanic vestibular stimulation (GVS) influences body balance and has proved to be useful to improve patients’ mood, quality of life, and cognitive skills. This study aimed to present three cases of patients with Parkinson’s disease and postural instability who had been submitted to GVS to improve their balance, by assessing the impact of this intervention on their cognition, mood, and quality of life. Patients were assessed before and after GVS sessions concerning P300 latency and scores on the 15-item Geriatric Depression Scale (GDS-15) and the 39-item quality-of-life Parkinson’s Disease Questionnaire (PDQ-39). The three patients’ P300 latency improved, possibly indicating improved attention. Their PDQ-39 score also improved, possibly indicating a positive impact on their quality of life. Their GDS-15 score did not change before and after the intervention. None of the patients had any intervention side effects. This three-case experimental pilot study has shown that GVS is a safe method, possibly useful to improve attention and, therefore, the quality of life of patients presented with Parkinson’s disease.