Effects of repetitive transcranial magnetic stimulation on non-veridical decision making


Tulviste J; Goldberg E; Podell K; Bachmann T. Institution Tulviste, Jaan. University of Tartu, Institute of Psycholo gy, Tartu, Estonia. jaant@ut.ee . Goldberg, Elkhonon. NYU School of Medicine and Luria Neuros cience Institute, New York, NY, USA. Podell, Kenneth. Houston Methodist Research Institute, Houst on, TX, USA. Bachmann, Talis. University of Tartu, Institute of Public Law, Tartu, Estonia.


Effects of repetitive transcranial magnetic stimulation on non- veridical decision making.

Source: Acta Neurobiologiae Experimentalis. 76(3):182-91, 2016.

Abstract: We test the emerging hypothesis that prefrontal cortical mechanis ms involved in non-veridical decision making do not overlap w ith those of veridical decision making. Healthy female subjects performed an experimental task assessing free choice, agent-centered decision mak ing (The Cognitive Bias Task) and a veridical control task related to visuospatial working memory (the Moving Spot Task). Transcr anial magnetic stimulation (TMS) was applied to the left and right dorsolateral prefrontal cortex (DLPFC) using 1 Hz and 10 Hz (intermitten t) rTMS and sham protocols. Both 1 Hz and 10 Hz stimulation of the DLPF C triggered a shift towards a more context-independent, internal representatio ns driven non-veridical selection bias. A significantly reduced preferenc e for choosing objects based on similarity was detected, following both 1 Hz and 10 Hz treatment of the right as well as 1 Hz rTMS of the left DLPFC . 1 Hz rTMS treatment of the right DLPFC also triggered a significant im provement in visuospatial working memory performance on the veridical task. The effects induced by prefrontal TMS mimicked those of posterior lesions, suggesting that prefrontal stimulation influenced neuronal act ivity in remote cortical regions interconnected with the stimulation site via longitudinal fasciculi.

Publication Type Journal Article.