In ALS group, fib and psw were found in thoracic paraspinal muscles in 28 of 30 ALS patients (93%), abnormal in sternocleidomastoid muscle in 27 of 30 ALS patients (90%), characterized by having long-duration and high-amplitude.

• 30例ALS患者中,28例(93%25)胸段棘旁肌肌电图可见正锐波和纤颤电位。 胸锁乳突肌肌电图异常27例(90%25),以运动单位时限增宽、波幅增高为特点。