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Figure 12


Fig. 12. An example of a Slow assistance (SA) depressor motor neuron (Dep MN). (A) The branches of this neuron are relatively sparse and are restricted to the posterior-medial and anterior-medial quadrants. This neuron receives only polysynaptic inhibition. The orthodromic delay is 5.6 ms. (B) In response to sinusoidal movement (mvt), this neuron hyperpolarized during the release phase and depolarized during the stretch phase, which is consistent with an assistance response. The ramp movement stimuli reveal that the input to this neuron is inhibitory. Similarly electrical stimulation of the CBCO nerve revealed only IPSPs (I). The resting membrane potential indicated by the dotted lines was –55 mV.





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