Tongue-based biofeedback for balance in stroke: results of an 8-week pilot study.

Abstract

To assess balance recovery and quality of life after tongue-placed electrotactile biofeedback training in patients with stroke. Prospective multicenter research design. Outpatient rehabilitation clinics. Patients (N=29) with chronic stroke. Patients were administered 1 week of therapy plus 7 weeks of home exercise using a novel tongue based biofeedback balance device. The Berg Balance Scale (BBS), Timed Up and Go (TUG), Activities-Specific Balance Confidence (ABC) Scale, Dynamic Gait Index (DGI), and Stroke Impact Scale (SIS) were performed before and after the intervention on all subjects. There were statistically and clinically significant improvements from baseline to posttest in results for the BBS, DGI, TUG, ABC Scale, and some SIS domains (Mobility, Activities of Daily Living/Instrumental Activities of Daily Living, Social, Physical, Recovery domains). Average BBS score increased from 35.9 to 41.6 (P<.001), and DGI score, from 11.1 to 13.7 (P<.001). Time to complete the TUG decreased from 24.7 to 20.7 seconds (P=.002). Including the BBS, DGI, TUG, and ABC Scale, 27 subjects improved beyond the minimal detectable change with 95% certainty (MDC-95) or minimal clinically important difference (MCID) in at least 1 outcome and 3 subjects improved beyond the MDC-95 or MCID in all outcomes. Electrotactile biofeedback seems to be a promising integrative method to balance training. A future randomized controlled study is needed.