Macroscopic and microscopic analyses in flexor tendons of the tarsometatarso-phalangeal joint of ostrich (Struthio camelus) foot with energy storage and shock absorption
| Autor: | Li Guoyu, Jianqiao Li, Rui Zhang, Ling Lei, Qiaoli Ji, Luo Gang, Dianlei Han |
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| Rok vydání: | 2017 |
| Předmět: |
musculoskeletal diseases
0106 biological sciences 0301 basic medicine Metatarsophalangeal Joint Biology 010603 evolutionary biology 01 natural sciences Tendons 03 medical and health sciences Collagen fiber medicine Animals Joint (geology) Struthioniformes Flexor tendon Foot Anatomy Toes musculoskeletal system biology.organism_classification Tendon body regions 030104 developmental biology medicine.anatomical_structure Flexor Digitorum Longus Animal Science and Zoology Collagen fiber bundle Energy Metabolism Developmental Biology Struthio |
| Zdroj: | Journal of morphology. 279(3) |
| ISSN: | 1097-4687 |
| Popis: | Flexor tendons function as energy storage and shock absorption structures in the tarsometatarso-phalangeal joint (TMTPJ) of ostrich feet during high-speed and heavy-load locomotion. In this study, mechanisms underlying the energy storage and shock absorption of three flexor tendons of the third toe were studied using histology and scanning electron microscopy (SEM). Macroscopic and microscopic structures of the flexor tendons in different positions of TMTPJ were analyzed. Histological slices showed collagen fiber bundles of all flexor tendons in the middle TMTPJ were arranged in a linear-type, but in the proximal and distal TMTPJ, a wavy-type arrangement was found in the tendon of the M. flexor digitorum longus and tendon of the M. flexor perforans et perforatus digiti III, while no regular-type was found in the tendon of the M. flexor perforatus digiti III. SEM showed that the collagen fiber bundles of flexor tendons were arranged in a hierarchically staggered way (horizontally linear-type and vertically linear-type). Linear-type and wavy-type both existed in the proximal TMTPJ for the collagen fiber bundles of the tendon of the M. flexor perforatus digiti III, but only the linear-type was found in the distal TMTPJ. A number of fibrils were distributed among the collagen fiber bundles, which were likely effective in connection, force transmission and other functions. The morphology and arrangement of collagen fiber bundles were closely related to the tendon functions. We present interpretations of the biological functions in different positions and types of the tendons in the TMTPJ of the ostrich feet. |
| Databáze: | OpenAIRE |
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