Résumé
Objective To propose A brain computer interface paradigm based on the combination of the motion-onset visual evoked potential(mVEP) and the steady state visual evoked potential(SSVEP).Methods By designing a 3 ×3 character spelling matrix,a vertical white bar in the column of matrix which flicks at a pre-set frequency induced the corresponding SSVEP.The vertical white bar also randomly moved horizontally so as to induce mVEP.Then the two types of features were extracted by time frequency analysis.Finally the support vector machine was applied to compare the target character identification rate between the proposed paradigm and the single mVEP paradigm.Results The target character identification accuracy of subject S1 and S6 was improved by about 2％ comparing the proposed paradigm to the single paradigm.Other subjects achieved the improvement of 6％ for the same performance comparison.The averaged identification accuracy of the proposed paradigm could reach 91.4％ if the same stimulus repeated for more than 3 times,while the accuracy of single paradigm achieved 85.6％.Conclusions The proposed brain computer interface paradigm could effectively induce many kinds of brain feature signals.The identification accuracy by the proposed paradigm is higher than that by the single paradigm for various numbers of repeated trials.The proposed paradigm of combined visual stimulus merges the motion induction and the flash frequency modulation together and hence reduces the stimulation time and increases the efficiency of the feature extraction.
Résumé
Objective To study the changes of the mood states at different time point of one-time exhaustive exercise.Methods16 participants were tested by POMS at the moments before,at,after recovery and after recovery 20 min of one-time exhaustive exercise.Results The scores of the 7 subscales got by 4 measures were used for one-way repeated measures analysis of variance.The results were showed that tension subscale scores (F (3.45) =0.335,P＞0.05,ES =0.022),anger subscale scores (F(3.45) =3.683,P＞0.05,ES =0.197),fatigue subscale scores (F(3.45 =0.863,P＞0.05,ES =0.054),depression subscale scores (F(3.45) =1.905,P＞ 0.05,ES =0.113 ),confusion subscale scores (F( 3.45) =0.601,P ＞ 0.05,ES =0.039 ) and self-esteem subscale scores (F(3.45) =2.804,P ＞ 0.05,ES =0.157 ) had no significant differences,but vigor subscale scores increased significantly (F(3.45) =8.778,P ＜ 0.01,ES =0.369).Conclusion One-time exhaustive exercises enhanced individual' s positive mood states.
Résumé
<p><b>OBJECTIVE</b>To study the effects of improving the neuromuscular transmission (NMT), "non-AChE-reactivating effects", by oximes in treating acute isocarbophos poisoning.</p><p><b>METHODS</b>The effect of pralidoxime chloride(PAM-Cl) on the neuromuscular transmission(NMT) in rats exposed to isocarbophos was studied by using the stimulation single fiber electromyography (SSFEMG) to determine the single fiber action potential.</p><p><b>RESULTS</b>After the rats exposed to isocarbophos were treated by PAM-Cl, the mean consecutive difference(MCD) value [(25.99 +/- 5.84) microsecond] of single fiber action potential was significantly lower than that before PAM-Cl treatment [(33.21 +/- 4.09) microsecond, (P < 0.01)], but no AChE reactivation in blood and gastrocnemius was observed.</p><p><b>CONCLUSION</b>PAM-Cl has "non-AChE-reactivating effects", it could markedly improve isocarbophos-induced NMT block of gastrocnemius.</p>