Research Paper Volume 18

Experimental protocol. The figure shows the study protocol consisting of two sessions, each lasting approximately two hours. The first session included a screening and BTT familiarization in a dummy MR scanner. During this session, participants were introduced to the Bimanual Tracking Task (BTT) and performed three task conditions - Line 1:1, Line 3:1, and Angle 3:1 - in all possible directions. The task setup was placed over the participants' hips while they lay supine in the scanner. In the second session, participants underwent an MR protocol comprising several sequences. Each trial of the BTT during fMRI included a 1-second preparation phase, a 6-second execution phase, and a 1-second interstimulus interval. The same three BTT conditions were used during the fMRI scan, but only in a single direction, as shown in the figure. Abbreviations: BTT = Bimanual Tracking Task; fMRI = functional Magnetic Resonance Imaging; MR = Magnetic Resonance; MRS = Magnetic Resonance Spectroscopy; rs-fMRI = resting-state fMRI; T1 = T1-weighted.