Electrical Spinal Imaging: A noninvasive, high-resolution approach that enables electrophysiological mapping of the human spinal cord
Fig 6
Attentional modulation of spinal cord activity.
Top and bottom panels: Neural responses recorded along the somatosensory pathways under the conditions of letter memorization (top panel), and attention to somatosensory stimulation (counting omissions, bottom panel). Both panels show the group-level response distribution on the dorsum and scalp at the eN9, sN13, cN20, sP22, and cP25 peak latencies. Electrode position and responses are color-coded according to the scheme shown in the inset. Middle panel: Difference maps obtained by subtracting the responses elicited during the omission task from those elicited during the letter memorization task, at the same latencies as the maps 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 significant difference in the cluster of spinal electrodes centered on the sP22, and the lack of differences in the early-latency cortical SEPs. The data underlying this figure can be found at https://doi.org/10.17605/OSF.IO/KHJCG.