The influence of galantamine on reaction time, attention processes, and performance variability in elderly Alzheimer...

To examine the effect of galantamine in elderly patients with mild to moderate Alzheimer disease (AD) on reaction time (RT), selective (SA) and alternating attention (AA), errors, and on interindividual and intraindividual variability.

Forty-one outpatients with AD were included in an open-label prospective trial and evaluated at baseline and after 8 and 22 weeks of treatment using a RT test that allows differentiation between the decision and movement time components of the total RT. The various tasks of the RT test allowed calculation of SA and AA. Standard AD evaluation tests were performed at baseline and after 22 weeks.

After 8 and 22 weeks of treatment, an improvement of decision time and RT at all complexity levels was noted. For movement time, improvements were less pronounced and not present at both follow-up moments or at all complexity levels. Selective attention, but not AA, improved significantly after 22 weeks. A decrease in the number of errors was noted. At several complexity levels, both at 8 and 22 weeks, the interindividual and intraindividual variability decreased. Changes in Mini Mental State Evaluation score were correlated with those in SA.

Our study provides arguments that galantamine treatment improves various parameters of the RT, attention, and interindividual and intraindividual variability in elderly AD patients. Because the study is not a controlled trial, further investigation is needed.