Improvement of Gaze Control After Balance and Eye Movement Training in Patients With Progressive Supranuclear Palsy: A Quasi-Randomized Controlled Trial

Time interval for vGFS and GEI calculation. (A) Foot (z-axis), head pitch, and vertical eye traces during a platform task. Subject started the task standing and looking straight ahead. The vertical Gaze Fixation Score (vGFS) was calculated starting at head pitch until the lag foot departed from the platform (blue arrow). (B) Head pitch velocity for the same trial. The vertical dashed trace indicates peak of head pitch velocity. Actual gaze angle was calculated at the point in time when head pitch velocity peaked down. Abbreviations: deg, degrees; GEI, Gaze Error Index.

Vertical gaze fixation score. (A) Average pretest and posttest values for the treatment and comparison groups on vertical Gaze Fixation Score during the step-up activity. Values displayed as means ± SEs. (B) Individual pretest and posttest values. Each dot represents 1 subject (average of 4 trials). Arrow down indicates direction of improvement. *Significant difference with α<.05.

Gaze error index. (A) Average pretest and posttest values for the treatment and comparison groups on Gaze Error Index during the step-up activity. Values displayed as means ± SEs. (B) Individual pretest and posttest values. Each dot represents 1 subject (average of 4 trials). Arrow down indicates direction of improvement. *Significant difference with α<.05.

Consort-E Flow Chart