In 6 patients with intramedullaty lesions, abnormal CMCT to the APB was observed in 2 cases (33.3%) and to the AT in 2 cases(33.3%). Abnormal CMCT correlated to cord compression and to upper motor neuron involvement.

• 6例髓内病变者 ；2例 ( 3 3 .；3%25 ) APB肌 CMCT异常；2例 ( 3 3