NEW GROUPING OF INTRAFUSAL MUSCLE-FIBERS BASED ON DEVELOPMENTAL STUDIES OF MUSCLE-SPINDLES IN THE CAT

被引：15

作者：

BUTLER, R

机构：

[1] Department of Anatomy, McMaster University, Hamilton, Ontario

来源：

AMERICAN JOURNAL OF ANATOMY | 1979年 / 156卷 / 01期

关键词：

D O I：

10.1002/aja.1001560112

中图分类号：

R602 [外科病理学、解剖学]; R32 [人体形态学];

学科分类号：

100101 ;

摘要：

The development of muscle spindles was studied using the tenuissimus muscle of the cat. Observations show that the intrafusal muscle fibers develop as two separate groups: one group represented by a single nuclear bag fiber while the second group comprises the second nuclear bag fiber in association with all the nuclear chain fibers. This grouping is most pronounced in the fetus and is clearly seen in neonatal kittens (i.e., up to 2 weeks of age). As the intrafusal fibers begin to separate from each other, the groupings become less noticeable, although this basic pattern is often retained in the adult. The pattern of intrafusal fiber grouping is most noticeable in the equatorial regions of the spindle and least noticeable in the polar regions. This is not the grouping of fibers which would have been expected from a consideration of existing reports on muscle spindles. The implications for spindle form and function are considered. Copyright © 1979 Wiley‐Liss, Inc.

引用

页码：115 / 120

页数：6

共 10 条

[1]

Barker D., Emonet-Denand F., Laporte Y., Proske U., Stacey M.J., Morphological identification and intrafusal distribution of the endings of static fusimotor axons in the cat, J. Physiol., 230, pp. 405-427, (1973)

[2]

Barker D., Stacey M.J., Adal M.N., Fusimotor innervation in the cat, Philosophical Transactions of the Royal Society B: Biological Sciences, pp. 315-346, (1970)

[3]

Boyd I.A., The structure and innervation of the nuclear bag and nuclear chain muscle fibres in the muscle spindle of the cat, J. Physiol., 153, pp. 23-24, (1960)

[4]

Boyd I.A., The structure and innervation of the nuclear bag muscle fibre system and the nuclear chain muscle fibre system in mammalian muscle spindles, Philosophical Transactions of the Royal Society B: Biological Sciences, pp. 81-136, (1962)

[5]

Boyd I.A., The response of fast and slow nuclear bag fibres and nuclear chain fibres in isolated cat muscle spindles to fusimotor stimulation, and the effect of intrafusal contraction on the sensory endings, Q. J1. Exp. Physiol., 61, pp. 203-254, (1976)

[6]

Brown M.C., Butler R.G., Studies on the site of termination of static and dynamic fusimotor fibres within muscle spindles of the tenuissimus muscle of the cat, The Journal of Physiology, 233, pp. 553-573, (1973)

[7]

Brown M.C., Butler R.G., An investigation into the site of termination of static gamma fibres within muscle spindles of the cat peroneus longus muscle, J. Physiol., 247, pp. 131-143, (1975)

[8]

Matthews P.B.C., The differentiation of two types of fusimotor fibre by their effects on the dynamic response of muscle spindle primary endings, Q. Jl. Exp. Physiol., 47, pp. 324-333, (1962)

[9]

Matthews P.B.C., Mammalian Muscle Receptors and Their Central Actions, (1972)

[10]

Ovalle W.K., Smith R.S., Histochemical identification of three types of intrafusal muscle fibres in the cat and monkey based on the myosin ATPase reaction, Can. J. Physiol. Pharmacol., 50, pp. 195-202, (1972)

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