There are few researches on the modulation effect of transcranial direct current stimulation(tDCS) on complex spatial cognition. Especially, the influence of tDCS on the neural electrophysiological response in spatial cognition is not yet clear. This study selected the classic spatial cognition task paradigm (three-dimensional mental rotation task) as the research object. By comparing the changes in behavior and event-related potentials in different modes of tDCS before, during and after the application of tDCS, this study analyzed the behavioral and neurophysiological effects of tDCS on mental rotation. The comparison between active-tDCS and sham-tDCS showed no statistically significant difference in behavior between different stimulation modes. Still, the changes in the amplitudes of P2 and P3 during the stimulation were statistically significant. Compared with sham-tDCS, the amplitudes of P2 and P3 in active-tDCS mode showed a greater decrease during the stimulation. This study clarifies the influence of tDCS on the event-related potentials of the mental rotation task. It shows that tDCS may improve the brain information processing efficiency during the mental rotation task. Also, this study provides a reference for an in-depth understanding and exploration of the modulation effect of tDCS on complex spatial cognition.
ObjectiveTo observe the effectiveness of core endurance isokinetic strength training on subacromial impingement syndrome (SAIS) rehabilitation.MethodsSAIS patients were selected from the Rehabilitation Department, Second Affiliated Hospital of Inner Mongolia Medical University from January 2018 to June 2019. The patients were randomly divided into observed group and control group by random number table method. The patients in control group were treated by keritherapy, cold, standard physiotherapy (PT) and exercise. At the same time, the patients in observed group were treated by core endurance isokinetic strength training combined with keritherapy, cold and standard PT. Both two groups were treated for 8 weeks. The patients were scored with visual analogue scale (VAS), Shoulder Pain and Disability Index (SPADI), Short Form 36 Healthsurvey Questionnaire (SF-36), flexor peak torque (FPT) and extensor peak torque (EPT) in pre and post treatment.ResultsA total of 59 patients with SAIS were enrolled. No exfoliating cases. There were 31 cases in the observed group and 28 cases in the control group. Pre-treatment, there were no significant difference in FPT, EPF, VAS, SPADI and SF-36 between the two groups (P>0.05). Post-treatment, there were no significant difference in EPT and VAS between the two groups (P>0.05); FPT [(62.65±10.17) N·m], SPADI [(53.18±10.25) points] and SF-36 [(35.54±11.39) points] in the observed group were significantly improved compared with the control group [(56.28±9.55) N·m, (61.05±9.41) points, (42.65±10.74) points] (t=2.473, 3.061, 2.460; P=0.014, 0.003, 0.017); FPT in both groups, and EPT in the observed group were improved compared with that of the pre-treatment (P<0.05); the EPT of the control group was improved compared with that of the pre-treatment, but the difference was not statistically significant (P>0.05); VAS, SPADI and SF-36 in the two groups were improved compared with those of the pre-treatment (P<0.05).ConclusionsCore endurance isokinetic strength training could improve the core stability of subacromial impingement syndrome patients. Satisfactory musculoskeletal dynamic chain plays a vital role in subacromial impingement syndrome rehabilitation.