对106例肌萎缩侧索硬化(ALS)与颈椎病性脊髓病(CSM),及两病鉴别困难者进行胸锁乳突肌、肢体肌及舌肌EMG检查。结果ALS组胸锁乳突肌神经源性损害的异常率高于三肢体肌、舌肌;CSM组胸锁乳突肌无1例异常。表明该肌神经源性损害能明显提高ALS亚临床的阳性率,有助于ALS的早期诊断及ALS与CSM两病的鉴别。 106 cases of amyotrophic lateral sclerosis (ALS) and cervical spondylotic myelopathy (CSM), and the identification of two patients with sternocleidomastoid, limb muscle and tongue EMG examination. Results The abnormal rate of neurogenic damage of sternocleidomastoid in ALS group was higher than that in the three limbs and tongue muscle. There was no abnormal sternocleidomastoid muscle in CSM group. The neurogenic damage of the muscle can significantly improve the positive rate of subclinical ALS, contribute to the early diagnosis of ALS and the identification of ALS and CSM two diseases.