Findings from Spearman’s correlation analysis evaluating the impact of age on the morphometric characteristics of the left caudate nucleus (LCN). A scatterplot illustrates the relationship between age and LCN length (LCNL). A weak but significant negative correlation was observed (Spearman’s ρ=–0.18, p=0.015), with advancing age associated with a gradual reduction in CNL. The red line represents the regression trend with 95% confidence bands.