Posture and mechanics of the forelimbs of Brachiosaurus brancai (Dinosauria: Sauropoda)
The posture and mechanics of the forelimbs of Brachiosaurus brancai were analysed with the help of biomechanical models. Peak forces in the joints due to acceleration of the fraction of body weight carried on the shoulder joints are critical in models with completely straight, column-like limbs and...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Pensoft Publishers
1999-01-01
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| Series: | Fossil Record |
| Online Access: | https://fr.pensoft.net/article/30183/download/pdf/ |
| _version_ | 1827393831985741824 |
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| author | A. Christian W.-D. Heinrich W. Golder |
| author_facet | A. Christian W.-D. Heinrich W. Golder |
| author_sort | A. Christian |
| collection | DOAJ |
| description | The posture and mechanics of the forelimbs of Brachiosaurus brancai were analysed with the help of biomechanical models. Peak forces in the joints due to acceleration of the fraction of body weight carried on the shoulder joints are critical in models with completely straight, column-like limbs and a rigid shoulder girdle. During fast walking, either the forelimbs were flexed at the elbows during the middle of the support phase or the apparently rigid shoulder girdle allowed movements of the shoulder joints relative to the trunk. The overall construction of Brachiosaurus was related to an extreme task, browsing high above the ground. Consequently, versatility was very restricted.Die Stellung und die Mechanik der Vorderbeine von Brachiosaurus brancai wurden mit Hilfe von biomechanischen Modellen untersucht. Kraftspitzen aufgrund von Beschleunigungen des von den Schultern getragenen Anteils der Körpermasse erscheinen in Modellen mit völlig geraden, säulenförmigen Vorderbeinen und einem unbeweglichen Schultergürtel problematisch. Während des schnellen Gehens waren entweder die Vorderbeine in der Mitte der Stützphase in den Ellenbogengelenken gebeugt oder der scheinbar rigide Schultergürtel erlaubte Bewegungen der Schultergelenke relativ zum Brustkorb. Die Gesamtkonstruktion von Brachiosaurus war auf die Ausübung einer extremen Tätigkeit, die Nahrungsaufnahme in großer Höhe, ausgerichtet. Die Konsequenz war eine geringe Vielseitigkeit.doi:10.1002/mmng.1999.4860020103 |
| first_indexed | 2024-03-08T17:57:09Z |
| format | Article |
| id | doaj.art-4cb09eb263ce4179818fcbdd0863ca52 |
| institution | Directory Open Access Journal |
| issn | 2193-0074 |
| language | English |
| last_indexed | 2024-03-08T17:57:09Z |
| publishDate | 1999-01-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | Fossil Record |
| spelling | doaj.art-4cb09eb263ce4179818fcbdd0863ca522024-01-02T04:12:38ZengPensoft PublishersFossil Record2193-00741999-01-0121637310.1002/mmng.1999.486002010330183Posture and mechanics of the forelimbs of Brachiosaurus brancai (Dinosauria: Sauropoda)A. Christian0W.-D. Heinrich1W. Golder2Museum für Naturkunde, Institut für Paläontologie, Invalidenstr. 43Institut für Palaeontologie, Museum für Naturkunde, Humboldt Universität, Invalidenstraße 43Freie Universität Berlin, Universitätsklinikum Benjamin Franklin, Fachbereich Humanmedizin, Radiologische Klinik und Poliklinik, Hindenburgdamm 30The posture and mechanics of the forelimbs of Brachiosaurus brancai were analysed with the help of biomechanical models. Peak forces in the joints due to acceleration of the fraction of body weight carried on the shoulder joints are critical in models with completely straight, column-like limbs and a rigid shoulder girdle. During fast walking, either the forelimbs were flexed at the elbows during the middle of the support phase or the apparently rigid shoulder girdle allowed movements of the shoulder joints relative to the trunk. The overall construction of Brachiosaurus was related to an extreme task, browsing high above the ground. Consequently, versatility was very restricted.Die Stellung und die Mechanik der Vorderbeine von Brachiosaurus brancai wurden mit Hilfe von biomechanischen Modellen untersucht. Kraftspitzen aufgrund von Beschleunigungen des von den Schultern getragenen Anteils der Körpermasse erscheinen in Modellen mit völlig geraden, säulenförmigen Vorderbeinen und einem unbeweglichen Schultergürtel problematisch. Während des schnellen Gehens waren entweder die Vorderbeine in der Mitte der Stützphase in den Ellenbogengelenken gebeugt oder der scheinbar rigide Schultergürtel erlaubte Bewegungen der Schultergelenke relativ zum Brustkorb. Die Gesamtkonstruktion von Brachiosaurus war auf die Ausübung einer extremen Tätigkeit, die Nahrungsaufnahme in großer Höhe, ausgerichtet. Die Konsequenz war eine geringe Vielseitigkeit.doi:10.1002/mmng.1999.4860020103https://fr.pensoft.net/article/30183/download/pdf/ |
| spellingShingle | A. Christian W.-D. Heinrich W. Golder Posture and mechanics of the forelimbs of Brachiosaurus brancai (Dinosauria: Sauropoda) Fossil Record |
| title | Posture and mechanics of the forelimbs of Brachiosaurus brancai (Dinosauria: Sauropoda) |
| title_full | Posture and mechanics of the forelimbs of Brachiosaurus brancai (Dinosauria: Sauropoda) |
| title_fullStr | Posture and mechanics of the forelimbs of Brachiosaurus brancai (Dinosauria: Sauropoda) |
| title_full_unstemmed | Posture and mechanics of the forelimbs of Brachiosaurus brancai (Dinosauria: Sauropoda) |
| title_short | Posture and mechanics of the forelimbs of Brachiosaurus brancai (Dinosauria: Sauropoda) |
| title_sort | posture and mechanics of the forelimbs of brachiosaurus brancai dinosauria sauropoda |
| url | https://fr.pensoft.net/article/30183/download/pdf/ |
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