Department of Physical Medicine & Rehabilitation, College of Medicine, Korea University, 516 Gojan-dong, Danwon-gu, Ansan City, Gyeonggi Province, 425-707 Seoul, Republic of Korea.
Muscle Nerve. 2010 Apr;41(4):566-8. doi: 10.1002/mus.21601.
L1 radiculopathy is very rare and difficult to diagnose with needle electromyography. A patient presented with pain and hypesthesia on the anterolateral aspect of the left thigh. Nerve conduction studies and needle electromyography were normal, except for the quadratus lumborum and iliopsoas muscles, which showed abnormal spontaneous activity and polyphasic motor unit potentials with reduced recruitment patterns. Magnetic resonance imaging of the lumbar spine showed disc extrusion of the L1-2 intervertebral space with upward migration. This case demonstrates the usefulness of examination of the quadratus lumborum in the diagnosis of L1 radiculopathy.
L1 神经根病非常罕见，用针肌电图诊断也很困难。一位患者表现为左大腿前外侧疼痛和感觉减退。神经传导研究和针肌电图除腰方肌和髂腰肌外均正常，这些肌肉显示异常的自发性活动和多相运动单位电位，募集模式减少。腰椎磁共振成像显示 L1-2 椎间盘突出伴向上移位。本例说明了检查腰方肌在诊断 L1 神经根病中的作用。
