Twist and chew: three-dimensional tongue kinematics during chewing in macaque primates
| Autor: | Kara L. Feilich, J. D. Laurence-Chasen, Courtney Orsbon, Nicholas J. Gidmark, Callum F. Ross |
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| Rok vydání: | 2021 |
| Předmět: |
Primates
Movement digestive oral and skin physiology Agricultural and Biological Sciences (miscellaneous) Biomechanical Phenomena X-ray reconstruction of moving morphology stomatognathic diseases Tongue stomatognathic system Animals Macaca Mastication Biomechanics General Agricultural and Biological Sciences Research Articles feeding |
| Zdroj: | Biology Letters |
| ISSN: | 1744-957X |
| DOI: | 10.1098/rsbl.2021.0431 |
| Popis: | Three-dimensional (3D) tongue movements are central to performance of feeding functions by mammals and other tetrapods, but 3D tongue kinematics during feeding are poorly understood. Tongue kinematics were recorded during grape chewing by macaque primates using biplanar videoradiography. Complex shape changes in the tongue during chewing are dominated by a combination of flexion in the tongue's sagittal planes and roll about its long axis. As hypothesized for humans, in macaques during tongue retraction, the middle (molar region) of the tongue rolls to the chewing (working) side simultaneous with sagittal flexion, while the tongue tip flexes to the other (balancing) side. Twisting and flexion reach their maxima early in the fast close phase of chewing cycles, positioning the food bolus between the approaching teeth prior to the power stroke. Although 3D tongue kinematics undoubtedly vary with food type, the mechanical role of this movement—placing the food bolus on the post-canine teeth for breakdown—is likely to be a powerful constraint on tongue kinematics during this phase of the chewing cycle. The muscular drivers of these movements are likely to include a combination of intrinsic and extrinsic tongue muscles. |
| Databáze: | OpenAIRE |
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