Figure 13.

Twenty grams of extensor force extends the hindlimb farther in test animals than in control animals with hemisection only. A, Bar graphs showing the difference between knee angle at the flexor force criterion (20 gm) in spinal hemisected controls (gray column) and in test animals with T13 nerve insertion at the time of hemisection (black column). Measurements were collected during weeks 3 and 4 and combined because mean forces at these two survival times were not significantly different. B, Regression of static knee angle (data from weeks 3 and 4) and knee angle at the force criterion of 20 gm.