Activity in the inferior head of the human lateral pterygoid muscle with different directions of isometric force
| Autor: | K. Wanigaratne, S Uchida, Greg M. Murray, Terry Whittle |
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| Rok vydání: | 2002 |
| Předmět: |
Adult
Male Computed tomography Mandible Isometric exercise Biology Lateral pterygoid muscle Bite Force stomatognathic system Isometric Contraction medicine Humans General Dentistry Motor Neurons medicine.diagnostic_test Electromyography Pterygoid Muscles Cell Biology General Medicine Anatomy Middle Aged Otorhinolaryngology Force magnitude Head (vessel) Female Stress Mechanical |
| Zdroj: | Archives of Oral Biology. 47:771-778 |
| ISSN: | 0003-9969 |
| DOI: | 10.1016/s0003-9969(02)00116-4 |
| Popis: | The aim was to test the hypothesis that this head of the muscle plays a part in the generation and fine control of horizontal mandibular forces in a range of directions. Electromyographic activity was recorded from the inferior head of the lateral pterygoid of eight individuals during the generation such forces to a target in contralateral, ipsilateral and protrusive directions, and in two intermediate directions (contralateral–protrusive, ipsilateral–protrusive). The mean electromyographic activity and the mean firing rates of 21 single-motor units were significantly affected by direction, with the highest activity being contralateral, and graded decreases occurring as the direction shifted to the ipsilateral. Firing rates were significantly correlated with force magnitude. The data suggest that the inferior head of the human lateral pterygoid is involved in the creation and fine control of mandibular forces in different horizontal directions. |
| Databáze: | OpenAIRE |
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