ECoG_Hemispheric_Asymmetry_dataset

Intracranial recordings were obtained from six patients implanted with subdural grids as part of their treatment for intractable epilepsy. Data were recorded at three hospitals: University of California, Irvine, University of California, San Francisco Medical Center and California Pacific Medical Center, San Francisco.

Patients performed an instructed-delay reaching task to targets on a touchscreen that was placed on their overbed table while they were seated upright in their hospital bed. Each block of trials (separated into different datasets) consisted of 40 trials performed with either their left or their right arm. Each patient performed two blocks per arm, with the order counterbalanced. For each block, every patient has two datafiles, one that contains a structure with the neural data which is titled by the patient ID, hemisphere of implantation, arm that was used to reach and the block number (i.e., R4_RightHemisphere_RightHand_1) and a separate file of the kinematics that also states the patient number, but then says 'Kin", the arm they reached with and the block number (i.e., R4_Kin_Righthand_1). For the neural dataset it is a matlab structure called SDATA that contains the neural time series for each electrode (time x elec) under SDATA.data. There is information about the sampling rate and channel labels under SDATA.info. For the kinematics, it is a matlab matrix called kin_mat that has seven different kinematics by time. The seven different kinematic variables are: position (across all three dimensions), speed, position in the X direction, position in the Y direction, position in the Z direction, spherical angle Theta which separates targets horizontally and spherical angle Phi which separates targets vertically. 

Please see our biorxiv preprint for more information about the task setup: 

https://www.biorxiv.org/content/10.1101/2021.05.01.442295v1