Abstract
Clinical and EMG findings in 10 cases of intrinsic brainstem lesions are reported with paradoxical activity of jaw closing muscles during jaw opening, with and without trismus. In five cases with trigeminal anaesthesia, the inverse activity of jaw closers is interpreted as a manifestation of disturbance in the central programming of mastication in the motor trigeminal area of the brainstem. Stretch reflex mechanisms and disinhibition of the trigeminal motor neurones play no part in the origin of inverse activity. The distinct brainstem syndrome can only be detected by EMG and the special clinical features.
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- ANGELONE L., CLAYTON J. A., BRANDHORST W. S. An approach to quantitative electromyography of the masseter muscle. J Dent Res. 1960 Jan-Feb;39:17–23. doi: 10.1177/00220345600390011201. [DOI] [PubMed] [Google Scholar]
- Bratzlavsky M. Segmental reflex control of oral motor activities: an electrophysiological study in man. Acta Neurol Belg. 1973 May-Jun;73(3):145–153. [PubMed] [Google Scholar]
- Jelasic F., Freitag V. Trismus als Symptom motorischer trigeminaler Dyssynergie bei Hirnstammprozessen. J Neurol. 1975 Aug 1;209(4):287–296. doi: 10.1007/BF00314368. [DOI] [PubMed] [Google Scholar]
- STRUPPLER A., STRUPPLER E., ADAMS R. D. Local tetanus in man. Its clinical and neurophysiological characteristics. Arch Neurol. 1963 Feb;8:162–178. doi: 10.1001/archneur.1963.00460020062005. [DOI] [PubMed] [Google Scholar]