时间标签：数据日期 2026-10-31 · 生成时间 2026-11-01 05:30（Asia/Shanghai）｜ 检索窗口 PubMed edat 2026/10/28–2026/10/31 ｜ 情报发生日期 2026-10-31
研究问题
These usages collapse distinct levels of analysis and obscure the central question: what happens to the motor unit when effective neural drive remains depressed for months or years?；A rehabilitation-centered literature has established that AMI can be modified, at least transiently, by interventions that alter afferent input or augment muscle activation., Evidence from related knee injury and reconstruction literature also supports transient reversibility with afferent- or activation-targeted interventions., It has not established whether persistent AMI changes motor-unit number, recruitment territory, discharge behavior or NMJ integrity.；The primary gap is whether objectively measured, sustained joint-related activation failure precedes motor-unit or tissue change within individuals, and whether reduced compensatory and regenerative reserve modifies that relationship.
方法
The novelty of the framework is therefore its separation of observed phenotypes from proposed temporal links, with repeated measurements, anatomical controls and explicit falsification criteria for each link.；Human mechanistic studies, longitudinal cohorts, tissue studies, systematic reviews and experiments perturbing joint afference were prioritized.；Evidence was classified according to both source and inferential distance. “Direct human evidence” refers to observations in KOA or closely defined peri-arthroplasty cohorts. “Translational evidence” refers to human experimental joint perturbation or animal KOA models that inform mechanism. “Mechanistic analogy” refers to findings from aging, disuse, or neuromuscular disease that establish biological plausibility but cannot establish a KOA-specific causal pathway.
核心结论
Motor cortical organization differs from that of controls, but topographic reorganization does not identify whether the change is adaptive or pathogenic.；Increased intracortical inhibition has also been interpreted as compensation for chronic pain rather than as the primary cause of weakness.；These findings are compatible with a system attempting to stabilize output under altered afferent conditions. ‖ 结论：Until then, mechanism-directed care should target measured constraints and functional participation; NMJ-directed treatment remains investigational.
局限
It does not establish that persistent AMI causes denervation–reinnervation or progressive NMJ degeneration; the KOA-specific NMJ extension remains predominantly preclinical.
对本项目的价值
★☆☆☆☆ 衰弱/肌少症是少有的已有监管认可终点的老年综合征，是临床转化的最短路径。设计 cross-sectional。
全文来源
PMC JATS 全文（正文 50,519 字符，已过标题/DOI 逐字归属校验）
原文题录
- 英文标题：Neuromuscular Remodeling in Knee Osteoarthritis Across Aging: An Evidence-Bounded Joint-Afferent-Motor Unit Framework.
- 期刊与标识：Clin Interv Aging · PMID 42953747 · DOI 10.2147/cia.s648376
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