简介:TheP300,anendogenoussubcomponentoftheevent-relatedpotential,isthoughttoreflectcognitiveprocesses.Theevent-relatedpotentialevokedbytheold-newmemoryrecognitiontaskintheoddballparadigmissuitableforexaminingtheneuralprocessesinvolvedinmalingeredneurocognitivedeficits.Forty-fourundergraduateswererandomlyassignedtoasimulatedmalingeringgroupandatruth-tellinggroup.Another22patientswithheadinjurieswereenrolledasacontrolgroup.Allparticipantscompletedtheold-newmemoryrecognitiontaskintheoddballparadigm.ThemeanP300amplitudeofthesimulatedmalingeringgroupwassignificantlyreducedcomparedwiththetruth-tellinggroup(P<0.01),butwasincreasedcomparedwiththecontrolgroup(P<0.01).TheseresultsrevealedthattheP300,evokedbytheold-newmemoryrecognitiontaskoftheoddballparadigm,maybeahelpfulindicatorfordeterminingcognitivemalingering.
简介:目的研究运动再学习训练对缺血性卒中患者运动功能及其认知电位P500的影响。方法52名缺血性卒中患者运动再学习前后,对Berg平衡积分、Sheikh躯干控制积分、简式Fugl-Meyer运动功能评分及步行能力等指标进行评价,观察在运动功能改善的同时认知电位P300是否有改善。共治疗12周。结果运动再学习后缺血性卒中患者运动功能和认知功能显著改善,Berg平衡积分、Sheikh躯干平衡积分、简式Fugl-Meyer运动功能评分及步行能力等各指标治疗前后比较差异有统计学意义(P〈0.01),同时认知电位P300潜伏期比训练前明显缩短(P〈0.01),波幅较治疗前显著增高(P〈0.01)。结论运动疗法在改善缺血性卒中者运动功能的同时对认知功能的有积极的恢复作用。