肩甲切痕の乾燥人骨における変異:肩甲上神経絞扼への影響
Parul Upadhayay1, Ranjeeta Hansdak2, Nikhil Aggarwal1
1Anatomy, Army College of Medical Sciences, New Delhi, IND.
Cureus
|February 23, 2026
まとめ
この研究では、乾燥した人骨において、肩甲切痕(SSN)のIII型が最も一般的であることが判明した。SSNの変異を理解することは、肩甲上神経絞扼などの肩の状態の診断と治療に不可欠である。
科学分野:
- 解剖学
- 整形外科学
- 放射線学
背景:
- 肩甲切痕(SSN)は肩甲骨上の重要な解剖学的ランドマークであり、肩甲上神経が通過する。
- SSNの形態学的変異、特に上横肩甲靭帯(STSL)の骨化は、肩甲上神経絞扼を引き起こす可能性がある。
- SSNの変異に関する知識は、肩領域における正確な診断と外科的処置に不可欠である。
研究 の 目的:
- 乾燥した成人人骨の肩甲切痕の形態学的変異を調査すること。
- 修正Rengachary分類を用いてSSN型を分類し、それらの頻度分布を決定すること。
主な方法:
- 記述的研究により、70個の乾燥した成人人骨を分析した。
- 上縁が損傷した肩甲骨は除外された。
- 各SSNは、修正Rengacharyシステムに基づいてI~VI型に分類され、SPSSを用いて統計分析が行われた。
主要な成果:
- III型SSNが最も一般的で、標本の57.10%に見られた。
- 観察された他の型には、VI型(15.71%)、I型(14.28%)、II型(7.14%)、IV型(5.71%)が含まれた。
- V型SSNは存在せず(0%)、SSN型の分布は統計的に有意であった(p<0.05)。
結論:
- III型肩甲切痕は、調査対象集団における主要な形態学的パターンを表す。
- SSNの狭窄やSTSLの骨化を含む解剖学的変異は、肩甲上神経絞扼の潜在的な原因である。
- これらのSSN変異の認識は、肩の病状を管理する整形外科医、放射線科医、および臨床医にとって臨床的に重要である。
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