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Fig. 4. Bilateral hindlimb muscle-tone inhibition (A), ipsilateral hindlimb muscle-tone inhibition with contralateral muscle-tone facilitation (B), and contralateral muscle-tone inhibition (C) after OX-A microinjections (A: 1 µM, B: 0.2 µM, C: 1 µM) into pontine reticular formation. See abbreviations in Fig. 2. Top horizontal bars at the left indicate the time and duration of injections. Muscle-tone changes during OX-B microinjections in the pontine reticular formation were similar.

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