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. 2001 Sep 3;154(5):1059–1068. doi: 10.1083/jcb.200105040

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Copyright © 2001, The Rockefeller University Press

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Figure 3. — EMG response of jaw muscle induced by tactile stimulation. (A) The stimulation on the tongue evoked rhythmic EMG responses likely corresponding to suckling in wild-type neonates. Similar responses were detected in the JP-1 knockout neonates (B), although the baseline activity was higher than control and therefore the recording trace was rather noisy. It may be presumed that reduced contractions of jaw muscles did not produce modulative feedback regulation to the reflex system through muscle spindle cells in the mutant neonates. The horizontal bar, upper trace and lower trace show duration of stimulation, rectified and moving average EMG activity, and EMG recording, respectively. The rhythmic EGM recordings of suckling-like responses were detected in 87 out of 116 trials in wild-type mice (n = 5), and 53 out of 69 trials in JP-1 knockout mice (n = 3).