title: Ipsilateral directional encoding of joystick movements in human cortex.
abstract: The majority of Brain Computer Interfaces have relied on signals related to primary motor cortex and the operation of the contralateral limb. Recently, the physiology associated with same-sided (ipsilateral) motor movements has been found to have a unique cortical physiology. This study sets out to assess whether more complex motor movements can be discerned utilizing ipsilateral cortical signals. In this study, three invasively monitored human subjects were recorded while performing a center out joystick task with the hand ipsilateral to the hemispheric subdural grid array. It was found that directional tuning was present in ipsilateral cortex. This information was encoded in both distinct anatomic populations and spectral distributions. These findings support the notion that ipsilateral signals may provide added information for BCI operation in the future.
authors: Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA.
authors: Mohit
authors: M
authors: Sharma
authors: Charles
authors: C
authors: Gaona
authors: Jarod
authors: J
authors: Roland
authors: Nick
authors: N
authors: Anderson
authors: Zachary
authors: Z
authors: Freudenberg
authors: Eric C
authors: EC
authors: Leuthardt
mesh_terms: D000328:Adult; D000465:Algorithms; D016287:Computer Peripherals; D004562:Electrocardiography / Q000379:methods*; D004827:Epilepsy / Q000503:physiopathology*; D019054:Evoked Potentials, Motor; D006801:Humans; D008875:Middle Aged; D009044:Motor Cortex / Q000503:physiopathology*; D009068:Movement; D013647:Task Performance and Analysis; D014584:User-Computer Interface