GRIA2 and Spasticity: PS-NSFA revealed a drop in the single-channel AMPAR-conductance (γ): from 19.9 ± 3.7 pS (n = 6 AFNs, 453 AMPAR-currents) in control to 6.05 ± 1.32 pS (n = 4 cells, 670 AMPAR-currents) in spasticity (p < 0.001, bootstrap hypothesis test; Fig. 3g), confirming the lack of GluA2-lacking AMPARs from synapses of AFNs post-SCI.