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Figure 8


Fig. 8. Sensory and central inputs to tibial motoneurons. (A) Intracellular recordings of SETi (left) and SFTi1–3 (right) at rest. No synaptic activity was recorded in SETi, while SFTi1–3 received frequent synaptic inputs. (B) Sensory stimulation during hyperpolarising current injection to unmask any weak inputs. Motoneurons at rest did not respond to auditory or visual inputs, but did respond to wind and tactile inputs. (C) Extracellular electrical stimulation of descending pathways evoked EPSPs and spikes in all motoneurons. Four examples are shown of recordings with increasing stimulation amplitude. (D) Bath application of pilocarpine or picrotoxin elicited motor bursts in all motoneurons.





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