Figure 1

HYPERLINK "sps:id::fig1||locator::gr2" The relationship across caudate connectivity, AD-like CBF pattern, and cognitive performance. (A) Right caudate BC and MoCA scores were positively correlated in the Parkinson’s group only (rho = 0.629, p = 0.005), and not in the healthy controls (rho =  − 0.19, p = 0.59). (B) AD-like CBF pattern scores and MoCA scores were negatively correlated in controls (rho =  − 0.782, p  = 0.008) but not in PD patients (rho =  − 0.122, p  = 0.631). (C) No significant correlation between BC of the right caudate and the AD-like CBF pattern scores was found in either group (p  > 0.58).