Electrical Spinal Imaging: A noninvasive, high-resolution approach that enables electrophysiological mapping of the human spinal cord
Fig 5
Lateralization of neural responses along the somatosensory pathways.
Top and bottom panels: Neural responses recorded along the somatosensory pathways following the stimulation of the median nerve at the left and right wrist, respectively. Top and bottom panels display the group-level response superimposed from all 97 electrodes, referenced to S64 for the spinal electrodes, and to Fz for the scalp electrodes. Electrode position and responses are color-coded according to the scheme shown in the inset. These panels also contain dorsum and scalp maps at the latency of the eN9, sN13, cN20, sP22, and cP25 peaks. Middle panel: Difference maps obtained by subtracting the right response from the left response, at the same latencies as the maps shown in the top and bottom panels. Yellow circles identify electrodes showing statistically significant effects (p < 0.01, cluster-corrected in both time and space; see Methods for details). Note the clear lateralization of the response recorded from the brachial plexus (eN9) and the brain (cN20 and cP25), and the lack of lateralization of the spinal responses (sN13 and sP22). The data underlying this figure can be found at https://doi.org/10.17605/OSF.IO/KHJCG.