Fig. 4.

The correlation between handedness index on the tube task and SY-immunoreactive puncta density asymmetry quotient (A). Boxplots of the asymmetry quotients for SY-immunoreactive puncta density and SY protein expression level according to handedness category (B). Positive AQ and HI values indicate rightward asymmetry and negative values indicate leftward asymmetry. The box encompasses 75–25%, with the line indicating the 50% point. Whiskers indicate the maximum and minimum values, excluding outliers and extremes. Circles indicate outliers and asterisk indicates extreme. All data, including outliers and extremes, were used in the statistical analyses.