肩関節術後における脊髄前角細胞興奮性の変動−Ｆ波の経時的観察−

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The purpose of this study was to evaluate the modulation of excitability of spinal motor neuron function. We investigated F waves after arthroscopic shoulder surgery. We evaluated 7 subjects who underwent an arthroscopic shoulder surgery. There were 5 men and 2 women, the mean age at the time of surgery was 33.6 years old. In our study, F waves were recorded from the abductor pollicis muscle after transcutaneous median nerve stimulation at bilateral wrists. Stimulation current was gradually increased to exceed that needed to evoke a maximum M wave. This supramaximal current was used for all subsequent stimulations. An amplification for F wave analysis of 16 consecutive stimuli were delivered. Preoperation, after 1 day, 3 days and 7 days, F waves were recorded. The mean F-wave amplitudes were determined in each time period, and statistical analyses were performed. F wave amplitudes, after 1 day recorded at each wrist were significantly lower than at pre-operation. F wave amplitude gradually increased in time in the postoperative period. However, in case 4, the F wave amplitude was lower than that of preoperation. F-wave amplitude can be considered a variable reflecting the functional integrity of the motor system from the spinal portion of a motor neuron to the neuromuscular junction. These results suggested that inexcitability of spinal motor neuron function is potentially caused by the rest after the operation. F wave monitoring could provide additional information on the state of rehabilitation in the early postoperative period.
日本肩関節学会の論文

肩関節術後における脊髄前角細胞興奮性の変動−Ｆ波の経時的観察−

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