Figure 10. Simulated effects of the number of stimulated RB neurons on the EPSP in model ipsilateral and contralateral motoneurons (cf. Fig. 3).

A, in a single experiment, the EPSP in the contralateral motoneuron (•) is larger and increases more rapidly with number of RB neurons stimulated than in the ipsilateral motoneuron (○). B and C, in 100 experiments with random variation as specified in Table 2, EPSPs are consistently smaller in the ipsilateral motoneuron (B) than in the contralateral motoneuron (C).