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Electromyography (EMG) from temporalis muscle in rats injected with 0. 5 mg/kg of the muscarinic agonist pilocarpine (IP). Raw EMG traces and spectral analyses of the EMG data during periods with tremulous jaw movements (top) and without tremulous jaw movements (bottom). During bouts of jaw movement activity, rats show bursts of muscle activity (raw EMG trace, bottom left); spectral analyses revealed a peak in the 5 to 6-Hz frequency range for this trace (arrow).
