FIG. 5.

Inhibition of a primate spinothalamic tract cell by baclofen administered in the spinal cord by microdialysis. A: Background activity of the neuron is shown before and during the administration of the GABAB receptor agonist baclofen and (left) right during the coadministration of baclofen and the GABAB receptor antagonist, phaclofen (right).B: Responses of the cell to brush, pinch, and heat stimuli applied to the receptive field before and during baclofen administration and during coadministration of baclofen and phaclofen. C: Antidromic and orthodromic action potentials of the neuron at different times during the experiment. (From Lin et al., 1996c.)