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脊柱腰段，更多时被称为腰椎，包含5个椎体，分别称为腰1至腰5。腰段位于胸椎（脊柱胸段）与骶骨之间。  警告：请在有WIFI的场所观看视频，土豪请随意。
lumbar spine anatomy 腰椎解剖 The lumbar region of the spine, more commonly known as the lower back, consists of five vertebrae labeled L1 through L5. The lumbar region is situated between the thoracic, or chest, region of the spine, and the sacrum. 脊柱腰段，更多时被称为腰椎，包含5个椎体，分别称为腰1至腰5。腰段位于胸椎（脊柱胸段）与骶骨之间。 The lumbar spine typically has a slight inward curve known as lordosis. 腰椎正常情况下有轻度向前的弧度，称为前凸。 The lower back region contains large muscles that support the back and allow for movement in the trunk of the body. These muscles can spasm or become strained, which is a common cause of lower back pain. 腰部有强大的肌肉，支持部位并允许身体躯干的运动。这些肌肉有时会痉挛或扭伤，是引起腰痛的主要原因。 The five vertebrae of the lumbar spine are connected in the back by facet joints, which allow for forward and backward extension, as well as twisting movements. The two lowest segments in the lumbar spine, L5-S1 and L4-L5, carry the most weight and have the most movement, making the area prone to injury. 五节腰椎在后方通过关节突关节相连，可允许前后伸屈以及扭转运动。腰椎最下面的两个节段，腰5-骶1和腰4-5，承重最大，活动最多，因此容易损伤。 In between vertebrae are spinal discs, which cushion the joints of the spine and provide support. Discs in the lumbar region of the spine are most likely to herniate or degenerate, which can cause pain in the lower back, or radiating pain to the legs and feet. 在椎体之间是椎间盘，它是脊柱关节之间的软垫，并提供支撑。脊柱腰段的椎间盘更易于突出或退变，由此可引起腰痛或腿和足的放射痛。 The spinal cord travels from the base of the skull to the joint at T12-L1, where the thoracic spine meets the lumbar spine. At this segment, nerve roots branch out from the spinal cord, running from the lower back through the back of the leg, and down to the toes. 脊髓从颅底移行于胸12-腰1节段，此处胸椎与腰椎相连，在这个节段，从脊髓分出神经根，从腰椎经过下肢后方，下达足趾。 Some lower back conditions may compress these nerve roots, resulting in pain that radiatesto the lower extremities, known as radiculopathy. 有些腰背疾病会压迫这些神经根，引起放射到下肢的疼痛，称为神经根性病变。 （高晨珉 转） |
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