L5根性疼痛的皮肤区域反映

f the L4 disc herniates into the 'lateral recess' (which is where it usually does) and compresses / irritates the descending L5 nerve root, the patient may suffer an L5 radicular pain (aka: L5 root-pain, or L5 Sciatica).

如果L4椎间盘突入“侧隐窝”且压迫或刺激下行的L5神经根压，该患者有可能表现为L5根性疼痛（又名：L5根性痛，或L5坐骨神经痛）。

If the 'motor portion' (portion of the nerve root which connects to muscle) of the L5 nerve root is damaged or irritated by the disc herniation, the patient my suffer weakness in the Extensor Hallusis Longus muscle (muscle that lifts the big toe - classic finding) or the muscles that dorsi-flex the foot (lift the foot up) upward. If severe, the patient will be unable to 'walk on their heals' with their toes and ball-of-the-foot off the ground. There is no reliable reflex test for this nerve root.

如果L5神经根的“运动支”（连接肌肉的神经根部分）因椎间盘突出而损坏或发生炎性反应，病人可能出现拇长伸肌（使大脚趾背屈的肌肉）、使脚背曲的肌肉（抬脚的肌肉）的无力。如果情况严重，病人将不能像健康时候那样运用脚趾头的方式走路，脚会变得像球一样着地。针对此神经根没有可靠的反射测试。

Fig. # 5 shows the regions in the lower limb where the patient will most likely suffer the symptoms of L5 sciatica (2). As you can see, the majority of patients (75%) suffer the burning, stinging, and numbing pain of sciatica in the top and inner surface (dorsum) of the foot, the outer-front of the leg, and the bottom of the big toe. These pains are the result of damage and irritation to the 'sensory portion' (portion of the nerve root which connects to skin) of the nerve root. 图5表示L5坐骨神经痛患者极有可能出现症状的区域，大部分患者（75％）在足背面、腿的前外侧、大脚趾的底部遭受如烧灼样、针刺样或者麻木样坐骨神经痛。这些疼痛是由神经根的感觉支（连接皮肤的神经根部分）损伤或者受刺激的结果。