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Natsuyama Y, Zhang M, Yang T, Shimada K, Ren K, Kamikawa Y, Tokita K, Fujiwara M, Chen J, Yi SQ. The continuous structure of the joint capsule and meniscus in the pig knee. Anat Histol Embryol 2023; 52:789-797. [PMID: 37306076 DOI: 10.1111/ahe.12938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/27/2023] [Accepted: 05/31/2023] [Indexed: 06/13/2023]
Abstract
The knee joint capsules composed of a fibrous layer and a synovial layer. The knee meniscus consists of the superficial network, lamellar layer, tie fibre and circumferential bundles. However, the continuous structure of the knee joint capsule and meniscus has not been reported. Fetal and adult pigs were used to investigate the structural relationship between the stifle joint capsule and meniscus based on the gross anatomy and histological findings. In the gross anatomical examination, the joint capsule appeared to have separated attachments to the meniscus, except for the lower aspect of the popliteal hiatus. Histologically, the lower half of the popliteal hiatus was found to have separated attachments, with vessels running between the attachments of the joint capsules. The synovial layer of the joint capsule continued to the superficial network, and the fibrous layer of the joint capsule continued to the lamellar layer and tie fibres. There were two routes of arterial entry into the meniscus: intracapsular and intercapsular. It appeared that the presence of separated attachments of the joint capsule was necessary to allow the intercapsular route. This study clarified for the first time the routes of feeding vessels entering the meniscus and proposed to call this entry point the meniscus hilum. We consider that this detailed anatomical information is important for understanding the continuation between the joint capsule and the meniscus.
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Affiliation(s)
- Yutaro Natsuyama
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
- Department of Anatomy, Tokyo Medical University, Tokyo, Japan
| | - Mingshou Zhang
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Ting Yang
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Kazuyuki Shimada
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Ke Ren
- Faculty of Physical Education, Qu Jing Normal University, Yun Nan, China
| | - Yasuko Kamikawa
- Department of Maxillofacial Diagnostic and Surgical Science Field of Oral and Maxillofacial Rehabilitation, Graduate School of medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Konosuke Tokita
- Department of Physical Therapy, Faculty of Health Sciences, Saitama Medical University, Saitama, Japan
| | - Motoi Fujiwara
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Juefei Chen
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
| | - Shuang-Qin Yi
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University, Tokyo, Japan
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