Fig. 7. Microdialysis for spinal noradrenaline release. Normal (n = 6) and spinal nerve–ligated (SNL; n = 6) rats received intravenous saline or gabapentin (GBP, 50 mg/kg). Data are presented over time as percentage of baseline. GBP groups significantly differ from saline group by two-way repeated-measures analysis of variance ( P < 0.05). * P < 0.05 versus time 0 by one-way analysis of variance.