Case No.  Age (y) Sex MMSE     TUG     Pre Post 1w Post 3m Pre Post 1w Post 3m 1 77 M 27 27 29 20 17 15 2 77 F 29 24 30 22 17 15 3 72 F 23 28 30 22 14 14 4 81 M 29 27 30 16 14 12

Table 1: Comparison between the preoperative and postoperativeresults of the MMSE and TUG of four patients who underwent LPSplacement followed by donepezil administration. M, male; F, female;pre, preoperative; post 1w, 1 week after LPS placement; post 3m, 3months after LPS placement.