基于行走模式的功能性电刺激对健康青年体感诱发电位的影响

目的 观察基于人体正常行走模式的四通道功能性电刺激(FES)对健康青年下肢体感诱发电位的影响,并与双通道FES比较.方法 健康青年受试者13名,男6名,女7名,分成双通道FES组(双通道组)和四通道FES组(四通道组).双通道组先接受30 min双通道FES治疗,四通道组先接受15 min四通道FES,间隔3 d后,2组互换接受第2次刺激.每次刺激前、后均接受体感诱发电位(SEP)检测,记录N9及P40的潜伏期和波幅.所有受试者均刺激右侧下肢.结果 2组受试者在接受2种FES后,与组内刺激前比较,刺激侧的SEP值潜伏期缩短,波幅增高,差异有统计学意义(P＜0.05),非刺激侧潜伏期和波幅变化不明显(P>0.05);四通道组与双通道组比较,FES后刺激侧N9潜伏期差异有统计学意义(P＜0.01),非刺激侧潜伏期和波幅变化并不明显(P>0.05).结论 健康青年下肢接受四通道FES后,刺激侧N9潜伏期较双通道显著性缩短,提示基于行走模式的FES能更快地激活脑细胞.

Abstract：

Objective To observe the effects on somatosensory evoked potentials (SEPs) of multichannel functional electrical stimulation (FES) of the legs based on a normal walking pattern,and to compare the effects with two-channel functional electrical stimulation.Methods Thirteen healthy young volunteers (6males and 7 females) were randomly assigned to receive 2 sessions of either two-channel FES for 30 minutes or four-channel FES for 15min with a 3-day interval between the two treatment sessions.The latencies and amplitudes of the N9 and P40 SEPs were recorded before and after every treatment.All the treatments were carried out on the right lower limbs.Results Thirteen healthy young volunteers (6males and 7 females) were randomly assigned to receive 2 sessions of either two-channel FES for 30 minutes or four-channel FES for 15 min with a 3-day interval between the two treatment sessions.The latencies and amplitudes of the N9 and P40 SEPs were recorded before and after every treatment.All the treatments were carried out on the right lower limbs.Conclusions The N9 latency with four-channel FES is remarkably shorter than that with two-channel FES on the legs of healthy young subjects,suggesting that multichannel functional electrical stimulation based on the normal human walking pattern can activate brain cells faster.

Effects of walking-pattern-based functional electrical stimulation on somatosensory evoked potentials in healthy young subjects