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1、AnalysisoftheEEGofepilepticpatientsofwaveforms(分析癫痫病人脑电图的波形表现) 1,Spikes:spikessuddentransientEEGchangestheobviousprominentinthebackground,isepileptiformwaveformisoneofthemostcharacteristicperformance.Negativephase,andalsofornormal-phaseortwo-phase,three-phase.
2、Itsvolatilityvaryinsize,andmoreinmorethan100microvolts.50microvoltscalledshortspikesorspikes.Cycleinlessthan80milliseconds.Spikespromptedthebrainirritatinglesions.Spikesinslow-wavebackground,oftenrevealfromprimaryepilepticfocusornearthearea,whilethenormalbackgr
3、oundspikes,oftenlowervolatility,longcycle,frommoredistantlesionsspread.TheEEGthethespikesgraduallyincreasingphenomenonortheformationofspinesrhythm,oftenindicatesimpendingclinicalonset.Spikesseeninvarioustypesofepilepsy. 1、棘波:棘波为突发性的一过性脑电图变化,明显突出于背景,乃痫样波形是最具特征性
4、的表现之一。多为负相,亦可为正相或双相、三相。其波幅大小各不相同,多在100微伏以上。50微伏以下者称为短棘波或小棘波。周期在80毫秒以内。棘波的出现提示脑部有刺激性病灶。若在慢波背景上出现的棘波,常揭示来自原发癫痫灶或其附近区域,而在正常背景上出现棘波,波幅常较低,周期长,多由远处病灶传播而来。若在脑电图描记中出现棘波逐渐增多现象或形成棘节律,常预示即将出现临床发作。棘波可见于各型癫痫。 2,sharpwaves:sharpwavesuddentransientEEGchanges,samemeaningwith
5、spikes,isthesynchronousfiringofneurons,oneofthecommonepileptiformwavescharacteristicwaveform.IncreasingbranchedspikesSimilar,moresteeplydescendingbranchmoderate,itsperiodofbetween80to200milliseconds,andthevolatilityof100to200micro-volts,andoftennegativephase.Di
6、schargeitfromthemajorityofneuronsinthelargeroftheepilepticfocusspikesincompletesynchronization,orforlargerlesionsinthelargenumberofnervecellsynchronizationdischargerecoverydelaycanalsolesionsincorticalordeepspikessubcorticallesionsfardistancepropagation,prolong
7、edspikestime.CanbefoundinvarioustypesofepilepsyinterictalEEG. 2、尖波:尖波为突发性一过性脑电图变化,意义与棘波相同,乃神经元同步放电的结果,为常见的痫样波的特征波形之一。其上升支与棘波相似,较陡直,而下降支较缓,其周期在80~200毫秒之间,波幅100~200微伏,常为负相。它由较大的癫痫灶中多数神经元棘波放电的不完全同步,或为较大的病灶中大量神经元同步性放电恢复的延迟,也可以是病灶在皮质深部或皮质下棘波灶远距离传播,为棘波时间上的延长。可见于各型癫痫
8、发作间期脑电图中。 3,spike-slowwavecomplex:spike-slowwavecomplexspikesandcycleconsistingof200to500millisecondsslowwave,arenegativewave,positivewavesappearextremelyrare.Volatilityisg