the effect of transcranial alternating current stimulation over the supplementary motor area on bimanual coordination in elderly people

Background: transcranial alternating current stimulation (tacs) is a non-invasive method that offers a potential solution to reduce the effects of aging on brain function.aim: the aim of this study was to investigate the effect of offline tacs over the supplementary motor area on bimanual coordination in elderly people.materials and methods: thirty-one women aged of 60-75 years were selected as convenience. they were assigned to 2 conditions: tacs and sham, in random order, with one-week interval between conditions. after pre-test, each participant completed four trials of 5 min using purdue pegboard task. concurrently, participants received beta tacs with a current intensity of 1 ma. immediate retention test, transfer test, and delayed retention tests after 48 hours and 1 week were conducted. a 2(condition) x 4(test) anova with repeated measures was performed on gain scores.results: the main effects of condition and test were significant (p<0.0001). the bonferroni tests revealed the significant improvement of bimanual coordination in the tacs condition compared to the sham condition in all retention and transfer tests (p<0.05).conclusion: the findings highlights the potential use of offline beta tacs over the sma as a modulatory factor for enhancing bimanual coordination in the elderly women.