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老年人臀小肌脂肪浸润。

Fat infiltration in the gluteus minimus muscle in older adults.

机构信息

Graduate School of Health Science, Yamagata Prefectural University of Health Science, Yamagata, Japan.

Department of Anatomy, Yamagata University Faculty of Medicine, Yamagata, Japan.

出版信息

Clin Interv Aging. 2018 May 23;13:1011-1017. doi: 10.2147/CIA.S157402. eCollection 2018.

DOI:10.2147/CIA.S157402
PMID:29872279
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5973399/
Abstract

PURPOSE

Fat infiltration (FI) in the gluteus minimus muscle (GMin) has been reported as being restricted to the anterior part. The aim of this study was to verify whether FI is localized only to the anterior part of the GMin through the dissection of large number of elderly cadavers and to clarify the underlying mechanism of FI localized to a specific region.

MATERIALS AND METHODS

Thirty-eight hips from 20 embalmed elder cadavers were dissected for verification of FI localization. The samples of three regions - the fat infiltrated region of the anterior part (FI), the region without FI (non-FI), and the posterior region - were harvested from nine hips for the histological fiber type assessment.

RESULTS

The FI area was distributed at 2.6°-38° from the anterior border within the anterior part, of which function is responsible for hip extension and internal rotation and is likely reduced by disuse following aging. The number of type I fibers was lowest in FI, followed by non-FI, while the number of type I fibers was highest in the posterior. Meanwhile, the number of type II fibers was equivalent across the three regions. Atrophic type II fibers were observed in overall samples of the three regions, and grouped atrophy, which is evidence of denervation, was observed in FI and non-FI samples. Type grouping, which suggests to be reinnervated, was found in the non-FI and posterior samples but very little in the FI samples.

CONCLUSION

FI in the GMin in older adults restricted to deep within the anterior part is secondary to disuse and is strongly related to impaired denervation-reinnervation process.

摘要

目的

臀小肌（GMin）的脂肪浸润（FI）以前认为仅局限于前部。本研究旨在通过大量老年尸体解剖来验证 FI 是否仅局限于 GMin 的前部分，并阐明局限于特定区域的 FI 的潜在机制。

材料与方法

对 20 具防腐老年尸体的 38 个髋关节进行解剖，以验证 FI 定位。从 9 个髋关节中采集了三个区域（前部分的脂肪浸润区域（FI）、无 FI 区域（非 FI）和后区域）的样本，用于组织学纤维类型评估。

结果

FI 区域在前部的前边界内分布在 2.6°-38°，其功能负责髋关节伸展和内旋，并且由于衰老后的失用而可能减少。FI 中的 I 型纤维数量最低，其次是非 FI，而后部的 I 型纤维数量最高。同时，三个区域的 II 型纤维数量相当。在三个区域的所有样本中均观察到萎缩的 II 型纤维，并在 FI 和非 FI 样本中观察到群集萎缩，这是失神经的证据。在非 FI 和后部样本中发现了 II 型纤维的分组萎缩，提示有再支配，但在 FI 样本中则很少。

结论

老年人 GMin 内的 FI 局限于深部前部分是继发于失用的，与受损的去神经再支配过程密切相关。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/c8d01f8f7ffa/cia-13-1011Fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/0bf2e987c904/cia-13-1011Fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/8a95995bca41/cia-13-1011Fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/5e511947bd70/cia-13-1011Fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/d96ec5f7c1b0/cia-13-1011Fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/acce1c8fbc8b/cia-13-1011Fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/d8883bd3a213/cia-13-1011Fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/c8d01f8f7ffa/cia-13-1011Fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/0bf2e987c904/cia-13-1011Fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/8a95995bca41/cia-13-1011Fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/5e511947bd70/cia-13-1011Fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/d96ec5f7c1b0/cia-13-1011Fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/acce1c8fbc8b/cia-13-1011Fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/d8883bd3a213/cia-13-1011Fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d22/5973399/c8d01f8f7ffa/cia-13-1011Fig7.jpg

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