Fig. 1.

(A) A series of spinally evoked responses (mean of five responses at each intensity) from proximal and distal muscles from one subject 491863 at rest with increasing intensities of stimulation at pre-intervention. In (B), the thick black line represents the average control response when stimulated at 110 mA, while the red trace was generated during a maximal voluntary effort to generate a grip force. (C) Mean ± standard deviation (n = 5 response) spinally evoked middle responses (latency ∼15 msec) in (B). (D) Area under the curve of the rectified long latency electromyography (latency 30 msec-100 msec) in B.