Biomedical Engineering Reference
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Figure 6. Behavioral plasticity. (A) Post-lesional plasticity. 1. Time course of the decline in sensory-
evoked PSPs at days (D) after the CBCO nerve had been cut in vivo. 2. Sequential restoration of the
IPSPs (1) and then EPSPs (2) by a tonic electrical stimulation (>1h) of the sensory nerve. (B) Seroto-
nergic neuromodulation. In the presence of serotonin (5HT), the resistance reflex response evoked by
mechanical stimulations of the CBCO strand in the intracellularly recorded Dep MN is increased (1),
as well as the motoneuron input resistance (2) and the excitability of the resistance reflex interneuron
(IN, 3). This increase in interneuron excitability leads to an increase in the polysynaptic EPSPs evoked
in the Dep MN by a single identified CBCO unit (4).
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