Michael Tonndorf

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In the human masseter, motor-unit (MU) territories are reportedly focal and it is possible that they are confined to the muscle's internal aponeuroses. However, previous electromyographic (EMG) investigations of MU sizes have not correlated them with the muscle's internal architecture. In this study, 162 single-MU territories were assessed by scanning EMG(More)
BACKGROUND The craniomandibular muscles control jaw position and forces at the teeth and temporomandibular joints, but little is known regarding their biomechanical behaviour during dynamic function. The objective of this study was to determine how jaw muscle insertions alter position during different jaw movements in living subjects. METHODS Computer 3D(More)
A new approach is presented for recording regional muscle responses by means of a single intramuscular wire electrode. The technique exploits differences in impedance due to the locations of the recording and indifferent electrodes and also relies upon bandpass filtering. The method is demonstrated by recording the activity of the right masseter muscle at(More)
A method is presented for locating the positions of moving electromyographic needle electrodes relative to internal tendinous boundaries within the human masseter muscle. It combines scanning electromyography, needle electrode tracking, magnetic resonance imaging, and three-dimensional stereotactic reconstruction. The technique is useful for investigating(More)