著者

安部 幸雄 土井 一輝 酒井 和裕 深堀 勝之 藤井 裕之 河村 洋行 河合 伸也

出版者

West-Japanese Society of Orthopedics & Traumatology

雑誌

整形外科と災害外科 (ISSN:00371033)

巻号頁・発行日

vol.43, no.3, pp.1020-1022, 1994-09-25 (Released:2010-02-25)

参考文献数

9

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Peripheral nerve trunks are not rigidly fixed to surrounding tissues along their course. They slide longitudinally in their beds over several millimeters with movements of the extremity. This concept of peripheral nerve excurisions helps to explain the pathophysiological events occurring in entrapment neuropathy, chronic nerve irritation and nerve compression. Although this is an important physiological phenomenon, this has not been examined precisely.We examined excursion of the normal sciatic nerves of 10 adult rabbits. The following were investigated:1) Percentage elongation of the sciatic nerve under nomal lower limb motion.2) Excursion between epineurium and gliding floor.3) Excursion between the funiculus.4) Morphological changes of the sciatic nerves under nomal lower limb motion.5) Microanatomical features of the peripheral nerves adapting movements of the extremity.The results were as follows:1) Total percentage elongation of the sciatic nerve was 5.8% in 0° flexion of the knee and 90° flexion of the hip joint. But near the knee joint, the maximum percentage was 9.2%.2) Excursion was found between the epineurium and gliding floor, and between the funiculus.3) It was proven that in the funiculus the nerve fibres have an undulating spiral pattern, which is, after its discoverer, called Fontana's bands. When the nerve was stretched in the course of movement, the undulation straightened out until it disappeared. Microanatomical view represents the wave-like alignment of the nerve fibres.By these features, peripheral nerves can accommodate limb motion.

著者

木戸 健司 河合 伸也 小田 裕胤 石田 洋一郎 深堀 勝之 峯 孝友 日浦 泰博

出版者

West-Japanese Society of Orthopedics & Traumatology

雑誌

整形外科と災害外科 (ISSN:00371033)

巻号頁・発行日

vol.38, no.1, pp.386-388, 1989-10-25 (Released:2010-02-25)

参考文献数

2

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The purpose of this paper is to report morphological features of the cells in the human posterior longitudinal ligament, including its attachment to the vertebral bodies, and of the cultured cells derived from PLL. We used the transmission electron microscopy to observe the cells. Far from its vertebral attachment, the main constituent cells in PLL are fibroblasts. The closer to the vertebral bodies fibroblasts become degenerative, and chondrocytes are observed in the irregular collagen fibers. The closer still more, calcium deposits on the collagen fibers, and osteocytes become the dominant cells. Compared with these three types of cells fibroblast, chondrocyte, and osteocyte in PLL, the cultured cells resemble fibroblasts.