Segmental level of injury and MEPs.

<p>Schematics of the spinal cord illustrating segments above the injury (white area), at the injury site (black shaded area), within 5 segment below the injury (dark gray shaded area) and greater than 5 segments below the injury site (5-8 segments light shaded area; 17-23 segments light gray-striped area). (B) MEPs recorded from the BB, FDI, and TA in all motor tasks and patients tested are plotted as a function of the segmental level of injury. The abscissa shows the number of segments (grouped by 3 segments) from all muscles tested. The ordinate shows the size of MEPs as a % of the baseline MEPs in all muscles. Note that when the muscle tested was at or within 5 segments below the injury the size of MEPs remained unchanged during 70% of MVC compared to rest. Whereas, when the muscle tested was more than 5 segments below the injury the size of MEPs was increased and aberrantly high at longer distances during 70% of MVC compared to rest. Error bars indicate SEs.