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鸭肌梭的被膜。

Capsules of duck muscle spindles.

作者信息

Adal M N, Cheng S B

出版信息

Cell Tissue Res. 1980;211(3):465-74. doi: 10.1007/BF00234400.

DOI:10.1007/BF00234400
PMID:6448090
Abstract

Duck muscle spindles show a large outer capsule enclosing a number of intrafusal muscle fibres which are individually encircled by an inner capsule. The outer capsule consists of a multilayer of 4-6 flattened cells with elongated nuclei, and are usually lined by a basement membrane. They resemble and are linked with perineural cells of the nerve bundle that innervates the spindle. There is overlapping and interdigitation between branching processes of these cells. Some apposing surfaces develop junctional complexes in the form of hemi-desmosomes and desmosomes. The cytoplasmic content shows numerous pinocytotic vesicles, some polyribosomes, lamellated cisternae of rough endoplasmic reticulum and microfilaments. The inner capsule consists of cells showing, at the mid-equatorial region, a large ovoid nucleus and extensive branching of thin and long processes that overlap, forming numerous layers around each intrafusal muscle fibre. Bundles of collagen fibrils in a crescent-shaped configuration occur circumferentially between the multilayer of processes and the muscle fibre. Some linkages between the inner and the outer capsule cell processes provide a network that subdivides the large periaxial space into compartments. There is no basement material lining the inner capsule cells and the processes. Some cytoplasmic area occurs around the ovoid nucleus and the cytoplasm varies in density, showing some dilated short profiles of rough endoplasmic reticulum, a few pinocytotic vesicles and microfilaments.

摘要

鸭的肌梭有一个大的外囊，包裹着许多梭内肌纤维，每个梭内肌纤维又被一个内囊单独环绕。外囊由4 - 6层扁平细胞组成，细胞核呈细长形，通常有一层基底膜衬里。它们与支配肌梭的神经束的神经周细胞相似并相连。这些细胞的分支过程之间存在重叠和相互交错。一些相对的表面形成了半桥粒和桥粒形式的连接复合体。细胞质内含物有许多胞饮小泡、一些多核糖体、粗面内质网的板层状池和微丝。内囊由细胞组成，在赤道中部区域，有一个大的卵圆形细胞核，细长的突起广泛分支并相互重叠，在每个梭内肌纤维周围形成许多层。新月形排列的胶原纤维束周向分布在多层突起与肌纤维之间。内囊和外囊细胞突起之间的一些连接形成一个网络，将大的轴周间隙分隔成小室。内囊细胞及其突起没有基底膜物质衬里。卵圆形细胞核周围有一些细胞质区域，细胞质密度不同，可见一些扩张的粗面内质网短轮廓、一些胞饮小泡和微丝。

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本文引用的文献

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Electron microscopy of the motor end-plate and the neuromuscular spindle.运动终板和神经肌肉纺锤体的电子显微镜检查。
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HYPOTHESIS FOR A PRESSURE-SENSITIVE MECHANISM IN MUSCLE SPINDLES.肌梭中压力敏感机制的假说。
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MUSCLE SPINDLES IN MAN; THEIR MORPHOLOGY IN THE LUMBRICALS AND THE DEEP MUSCLES OF THE NECK.人类的肌梭；其在蚓状肌和颈部深层肌肉中的形态学
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The connective tissue of peripheral nerve: an electron microscope study.周围神经的结缔组织：一项电子显微镜研究
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Electron microscopic demonstration of the perineural epithelium in rat peripheral nerve.大鼠周围神经中神经周上皮的电子显微镜显示
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[The fine structure of the human neuromuscular spindle].
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[Studies on the histochemistry of muscle spindles. II. On the topochemistry and function of spindle spaces and spindle capsules].[肌梭的组织化学研究。II. 梭内间隙和梭囊的拓扑化学与功能]
Acta Histochem. 1961 Dec 30;12:277-88.
8
The fine structure of muscle spindles in the lumbrical muscles of the rat.大鼠蚓状肌中肌梭的精细结构
J Biophys Biochem Cytol. 1960 Jul;7(4):725-42. doi: 10.1083/jcb.7.4.725.
9
The histological fine structure of perineurium.神经束膜的组织学精细结构。
Anat Rec. 1967 Jun;158(2):177-89. doi: 10.1002/ar.1091580207.
10
The membranous coverings of neural tissues: an electron microscopy study.神经组织的膜性覆盖物：一项电子显微镜研究。
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