图 1.

Schematic diagram of single-level disc herniation (L_{4, 5} or L₅, S₁) compress double nerve roots

单节段椎间盘突出（L_4、5 或 L₅、S₁）压迫同侧双根示意图

a. L_4、5 椎间盘突出向内侧移位（同时有向下移位）压迫 L₅ 和 S₁ 神经根；b. L₅、S₁ 椎间盘突出向外侧移位压迫 L₅ 和 S₁ 神经根；c. L₅、S₁ 椎间盘突出向头侧和内侧移位压迫 L₅ 和 S₁ 神经根；d. 椎间孔内 L_4、5 椎间盘突出导致 L₄ 和 L₅ 神经根受压表现

a. Both L₅ and S₁ nerve roots were compressed by medial and downward displacement of L_{4, 5} disc herniation; b. Both L₅ and S₁ nerve roots were compressed by lateral displacement of L₅, S₁ disc herniation; c. Both L₅ and S₁ nerve roots were compressed by medial and upward displacement of L₅, S₁ disc herniation; d. Both L₄ and L₅ nerve roots were compressed by intraforaminal L_{4, 5} disc herniation