Fig. 2
From: Maintenance of contractile force of the hind limb muscles by the somato-lumbar sympathetic reflexes
Effect of lumbar sympathetic trunk transection on the tetanic force of the triceps surae muscles. a, b Typical responses of the tetanic force of the triceps surae muscles (lower traces) and mean arterial pressure (upper traces) induced by tetanic stimulation of the intact tibial nerve before (a) and 20 min after (b) lumbar sympathetic trunk (LST) transection. Each upper horizontal bar indicates the tetanic stimulation (0.2 ms, 2T, 10 pulses at 100 Hz) repeated 10 times at 1 Hz. c Averaged waveform of the 30 tetanic contractions before (dotted line) and after (solid line) LST transection. d Summary (n = 6 from six rats) of the changes in the amplitude of the tetanic force, expressed as a percentage of the mean of two controls obtained before LST transection. Each column, vertical bar, or circle indicates the median, interquartile range, and individual data. **p < 0.01 (Mann–Whitney U test)