Fig. 3.

Comparison of brain function in cataract patients before and after surgery. Surface maps show the fALFF value changes between preoperative and postoperative time points (at a whole-brain threshold of P < 0·05, AlphaSim corrected, voxels > 228, repeated measures analysis of variance). Slice overlays and plots represent the mean signals from the smoothed difference images for each cluster. Significant differences in signals are highlighted in the red circles. Blue and cyan reflect decreases. Red and yellow reflect increases, and t indicates the peak t-score value for the t-test. a, No significant difference in fALFF signals was detected between the preoperative and 1 week postoperative time points. b, The fALFF values were significantly decreased in the brainstem and cerebellum at 3 months postoperatively. c, The fALFF values were significantly decreased in the brainstem but increased in the superior parietal lobule 6 months postoperatively. Notes: L, left; Sup., superior.