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脊髓背角是脊髓後角嗎
脊髓背角是脊髓後角嗎
更新时间:2026-01-18 04:15:42

  脊髓背角是脊髓後角,二者在本質上是一樣的,它是痛覺傳遞的重要起始部位。脊髓是前後稍扁的圓柱體,其全長粗細不等,位于椎管内,上端在枕骨大孔處與延髓相連,下端尖削呈圓錐狀,稱為脊髓圓錐,圓錐的尖端延續為一細絲,稱為終絲,終絲向下經骶管終于第2尾椎的背面,成人脊髓的全長約為42~45厘米。

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