種子骨

骨: 種子骨
足の第1中足骨の遠位端にある種子骨
名称
日本語 種子骨
英語 Sesamoid bone
ラテン語 ossa sesamoideum
関連情報
テンプレートを表示
成人女性の左足のレントゲン写真。親指側第一中足骨関節にある種子骨

種子骨（しゅしこつ、英: sesamoid bone、ラテン語：Ossa sesamoidea）は、筋肉や腱の中に形成される骨である[1]。多くの場合、骨の歪に応じて形成される[2]。

役割として、頻繁に移動する部位（手や足）に生じ、腱や靱帯の方向を変える滑車のようにふるまい、骨と腱の間の摩擦を減らし、筋力を伝達する腱の能力を高める[1]。また、脱臼するのを防いでいる[3]。骨化の程度はまちまちである。

名前

英語のsesamoidは種子骨のサイズが小さいことから、ラテン語の"sesamum"（ゴマの種）を由来とする。

種子骨の例

種子骨の疾病

動物の例

馬やパンダなどにみられる。

出典

  1. ^ a b “Sesamoid Injuries”. aofas.org. 2017年3月10日閲覧。
  2. ^ a b Kenneth S. Saladin, Anatomy and Physiology, 6th edition (New York:McGraw Hill, 2012), 234.
  3. ^ 世界大百科事典 第２版 種子骨の解説
  4. ^ Tim D. White, Human Osteology, 2nd edition (San Diego: Academic Press, 2000), 199, 205.
  5. ^ Kenneth S. Saladin, Anatomy and Physiology, 6th edition (New York:McGraw Hill, 2012), 263.
  6. ^ White, Human Osteology, 2nd edition, 257-261.

関連項目

ウィキメディア・コモンズには、種子骨に関連するカテゴリがあります。
軟骨
骨
骨化
細胞
種類
  • 海綿質
  • 皮質骨
部位
構造
形状
その他
疾患等
学問
スタブアイコン

この項目は、医学に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めています（プロジェクト:医学／Portal:医学と医療）。

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