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Fig. 6. Effect of quisqualate (QU) injection into the pons on muscle activity. A: microinjection of QU (10 mM/0.1 µl) into pons produced suppression of muscle tone in the neck (RNM and LNM) and hindlimb (RHM and LHM). B: the specific non-N-methyl-D-aspartate (non-NMDA) antagonist, 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX, 10 µM/0.1 µl) microinjected into the same site does not have an effect on muscle activity. However, prior CNQX injection blocked the QA effect on muscle activity (C). RFM, right forelimb muscle.

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