author_facet PETERSEN, WOLF
STEIN, VOLKER
BOBKA, TIMM
PETERSEN, WOLF
STEIN, VOLKER
BOBKA, TIMM
author PETERSEN, WOLF
STEIN, VOLKER
BOBKA, TIMM
spellingShingle PETERSEN, WOLF
STEIN, VOLKER
BOBKA, TIMM
Journal of Anatomy
Structure of the human tibialis anterior tendon
Cell Biology
Developmental Biology
Molecular Biology
Ecology, Evolution, Behavior and Systematics
Histology
Anatomy
author_sort petersen, wolf
spelling PETERSEN, WOLF STEIN, VOLKER BOBKA, TIMM 0021-8782 1469-7580 Wiley Cell Biology Developmental Biology Molecular Biology Ecology, Evolution, Behavior and Systematics Histology Anatomy http://dx.doi.org/10.1046/j.1469-7580.2000.19740617.x <jats:p>The structure and vascular pattern of the human tibialis anterior tendon was investigated using injection techniques, light and transmission electron microscopy and immunohistochemistry. From the well vascularised peritenon, blood vessels penetrate the tendon tissue and anastomose with a longitudinally oriented intratendinous network. The distribution of blood vessels within the tibialis anterior tendon was not homogenous. The posterior part of the tendon had a complete vascular network that extends from the musculotendinous junction to the insertion at the first metatarsal and medial cuneiform bones. In the anterior half, the tissue was avascular in a zone with a length of 45–67 mm. This zone was covered by a single layer (∼30 μm) of oval shaped cells. Transmission electron microscopy showed that these cells have the characteristics of chondroid cells. This region was stained by Alcian blue at pH 1 which indicates a high concentration of acid glycosaminoglycans and immunohistochemical staining for chondroitin‐4‐sulphate, chondroitin‐6‐sulphate and aggrecan was positive. However, immunostaining for the typical cartilage specific type II collagen within this zone was negative. The location of the avascular zone corresponds to the region where the tibialis anterior tendon wraps around the superior and inferior retinacula which serve as fibrous pulleys. This is the region where most spontaneous ruptures of the tibialis anterior tendon occur. The presence of fibrocartilage within gliding tendons is a functional adaptation to compressive and shearing forces. In contrast to reports from the literature about the structure of gliding tendons wrapping around a bony pulley, the gliding zone of the tibialis anterior tendon has only a narrow layer of chondroid cells and proof of type II collagen is lacking.</jats:p> Structure of the human tibialis anterior tendon Journal of Anatomy
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series Journal of Anatomy
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title Structure of the human tibialis anterior tendon
title_unstemmed Structure of the human tibialis anterior tendon
title_full Structure of the human tibialis anterior tendon
title_fullStr Structure of the human tibialis anterior tendon
title_full_unstemmed Structure of the human tibialis anterior tendon
title_short Structure of the human tibialis anterior tendon
title_sort structure of the human tibialis anterior tendon
topic Cell Biology
Developmental Biology
Molecular Biology
Ecology, Evolution, Behavior and Systematics
Histology
Anatomy
url http://dx.doi.org/10.1046/j.1469-7580.2000.19740617.x
publishDate 2000
physical 617-625
description <jats:p>The structure and vascular pattern of the human tibialis anterior tendon was investigated using injection techniques, light and transmission electron microscopy and immunohistochemistry. From the well vascularised peritenon, blood vessels penetrate the tendon tissue and anastomose with a longitudinally oriented intratendinous network. The distribution of blood vessels within the tibialis anterior tendon was not homogenous. The posterior part of the tendon had a complete vascular network that extends from the musculotendinous junction to the insertion at the first metatarsal and medial cuneiform bones. In the anterior half, the tissue was avascular in a zone with a length of 45–67 mm. This zone was covered by a single layer (∼30 μm) of oval shaped cells. Transmission electron microscopy showed that these cells have the characteristics of chondroid cells. This region was stained by Alcian blue at pH 1 which indicates a high concentration of acid glycosaminoglycans and immunohistochemical staining for chondroitin‐4‐sulphate, chondroitin‐6‐sulphate and aggrecan was positive. However, immunostaining for the typical cartilage specific type II collagen within this zone was negative. The location of the avascular zone corresponds to the region where the tibialis anterior tendon wraps around the superior and inferior retinacula which serve as fibrous pulleys. This is the region where most spontaneous ruptures of the tibialis anterior tendon occur. The presence of fibrocartilage within gliding tendons is a functional adaptation to compressive and shearing forces. In contrast to reports from the literature about the structure of gliding tendons wrapping around a bony pulley, the gliding zone of the tibialis anterior tendon has only a narrow layer of chondroid cells and proof of type II collagen is lacking.</jats:p>
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author PETERSEN, WOLF, STEIN, VOLKER, BOBKA, TIMM
author_facet PETERSEN, WOLF, STEIN, VOLKER, BOBKA, TIMM, PETERSEN, WOLF, STEIN, VOLKER, BOBKA, TIMM
author_sort petersen, wolf
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description <jats:p>The structure and vascular pattern of the human tibialis anterior tendon was investigated using injection techniques, light and transmission electron microscopy and immunohistochemistry. From the well vascularised peritenon, blood vessels penetrate the tendon tissue and anastomose with a longitudinally oriented intratendinous network. The distribution of blood vessels within the tibialis anterior tendon was not homogenous. The posterior part of the tendon had a complete vascular network that extends from the musculotendinous junction to the insertion at the first metatarsal and medial cuneiform bones. In the anterior half, the tissue was avascular in a zone with a length of 45–67 mm. This zone was covered by a single layer (∼30 μm) of oval shaped cells. Transmission electron microscopy showed that these cells have the characteristics of chondroid cells. This region was stained by Alcian blue at pH 1 which indicates a high concentration of acid glycosaminoglycans and immunohistochemical staining for chondroitin‐4‐sulphate, chondroitin‐6‐sulphate and aggrecan was positive. However, immunostaining for the typical cartilage specific type II collagen within this zone was negative. The location of the avascular zone corresponds to the region where the tibialis anterior tendon wraps around the superior and inferior retinacula which serve as fibrous pulleys. This is the region where most spontaneous ruptures of the tibialis anterior tendon occur. The presence of fibrocartilage within gliding tendons is a functional adaptation to compressive and shearing forces. In contrast to reports from the literature about the structure of gliding tendons wrapping around a bony pulley, the gliding zone of the tibialis anterior tendon has only a narrow layer of chondroid cells and proof of type II collagen is lacking.</jats:p>
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spelling PETERSEN, WOLF STEIN, VOLKER BOBKA, TIMM 0021-8782 1469-7580 Wiley Cell Biology Developmental Biology Molecular Biology Ecology, Evolution, Behavior and Systematics Histology Anatomy http://dx.doi.org/10.1046/j.1469-7580.2000.19740617.x <jats:p>The structure and vascular pattern of the human tibialis anterior tendon was investigated using injection techniques, light and transmission electron microscopy and immunohistochemistry. From the well vascularised peritenon, blood vessels penetrate the tendon tissue and anastomose with a longitudinally oriented intratendinous network. The distribution of blood vessels within the tibialis anterior tendon was not homogenous. The posterior part of the tendon had a complete vascular network that extends from the musculotendinous junction to the insertion at the first metatarsal and medial cuneiform bones. In the anterior half, the tissue was avascular in a zone with a length of 45–67 mm. This zone was covered by a single layer (∼30 μm) of oval shaped cells. Transmission electron microscopy showed that these cells have the characteristics of chondroid cells. This region was stained by Alcian blue at pH 1 which indicates a high concentration of acid glycosaminoglycans and immunohistochemical staining for chondroitin‐4‐sulphate, chondroitin‐6‐sulphate and aggrecan was positive. However, immunostaining for the typical cartilage specific type II collagen within this zone was negative. The location of the avascular zone corresponds to the region where the tibialis anterior tendon wraps around the superior and inferior retinacula which serve as fibrous pulleys. This is the region where most spontaneous ruptures of the tibialis anterior tendon occur. The presence of fibrocartilage within gliding tendons is a functional adaptation to compressive and shearing forces. In contrast to reports from the literature about the structure of gliding tendons wrapping around a bony pulley, the gliding zone of the tibialis anterior tendon has only a narrow layer of chondroid cells and proof of type II collagen is lacking.</jats:p> Structure of the human tibialis anterior tendon Journal of Anatomy
spellingShingle PETERSEN, WOLF, STEIN, VOLKER, BOBKA, TIMM, Journal of Anatomy, Structure of the human tibialis anterior tendon, Cell Biology, Developmental Biology, Molecular Biology, Ecology, Evolution, Behavior and Systematics, Histology, Anatomy
title Structure of the human tibialis anterior tendon
title_full Structure of the human tibialis anterior tendon
title_fullStr Structure of the human tibialis anterior tendon
title_full_unstemmed Structure of the human tibialis anterior tendon
title_short Structure of the human tibialis anterior tendon
title_sort structure of the human tibialis anterior tendon
title_unstemmed Structure of the human tibialis anterior tendon
topic Cell Biology, Developmental Biology, Molecular Biology, Ecology, Evolution, Behavior and Systematics, Histology, Anatomy
url http://dx.doi.org/10.1046/j.1469-7580.2000.19740617.x