Umgaqo we-EEG?

Ukuveliswa kunye nokurekhodwa kwe-EEG:

I-EEG ifumaneka ngokubanzi ngama-electrodes phezu kwentloko yentloko.Indlela yokuvelisa i-scalp enokwenzeka ngokubanzi ikholelwa ukuba: xa ithule, i-apical dendrites yeeseli ze-pyramidal - iseli yonke kwi-axis ye-cell body ikwimo ye-polarized;xa impembelelo igqithiselwa kwelinye icala leseli, ibangela ukuba isiphelo sisuswe.Umahluko onokuthi ubekho kwiseli udala inkqubo yombane ye-bipolar, kunye noqukuqela langoku ukusuka kwelinye icala ukuya kwelinye.Ekubeni zombini i-cytoplasm kunye ne-extracellular fluid iqulethe i-electrolytes, yangoku iphinda idlule ngaphandle kweseli.Lo msebenzi wombane unokurekhodwa usebenzisa i-electrodes ye-scalp.Enyanisweni, utshintsho olunokwenzeka kwi-EEG kwi-scalp ludibaniso lweendawo ezininzi zombane ze-bipolar.I-EEG ayibonisi umsebenzi wombane weseli yemithambo-luvo, kodwa endaweni yoko irekhoda isixa somsebenzi wombane wamaqela amaninzi eeseli zemithambo-luvo kummandla wobuchopho omelwe zii-electrodes.
Amacandelo asisiseko e-EEG: I-waveform ye-EEG ayiqhelekanga kakhulu, kwaye i-frequency yayo iyatshintsha kuluhlu malunga ne-1 ukuya kumaxesha angama-30 ngesekhondi.Ngokuqhelekileyo olu tshintsho lwefrikhwensi luhlulahlulwe kwii-4 bands: i-frequency of delta wave yi-0.5 ukuya ku-3 amaxesha./ sec, i-amplitude yi-20-200 microvolts, abantu abadala abaqhelekileyo banokubhala kuphela eli gagasi xa belele ubuthongo obukhulu;i-frequency of theta wave ngamaxesha angama-4-7 ngesekhondi, kwaye i-amplitude imalunga ne-100-150 microvolts, abantu abadala bahlala belala Le wave ingarekhodwa;Amaza e-theta kunye ne-delta abizwa ngokudibeneyo njengamaza acothayo, kwaye amaza e-delta kunye namaza e-theta awabhalwanga ngokubanzi kubantu abaqhelekileyo abaphaphileyo;i-frequency yamaza e-alpha yi-8 ukuya kwi-13 amaxesha ngomzuzwana, kwaye i-amplitude yi-20 ukuya kwi-100 microvolts.Sisingqisho esisisiseko samaza obuchopho obuqhelekileyo obudala, okwenzeka xa amehlo evukile kwaye evaliwe;Ukuphindaphinda kwamaza e-beta ngama-14 ukuya kwangama-30 ngesibini, kwaye i-amplitude yi-5 ukuya kwi-20 microvolts.Umda wokucinga ubanzi, kwaye ukubonakala kwamaza e-beta kubonisa ukuba i-cerebral cortex ikwimo yochulumanco.I-EEG yabantwana abaqhelekileyo yahlukile kweyabantu abadala.Iintsana zilawulwa ngamaza asezantsi-amplitude acothayo, kwaye ukuphindaphindwa kwamaza obuchopho ngokuthe ngcembe kukhula ngokukhula.
①α wave: frequency 8～13Hz, amplitude 10～100μV.Yonke imimandla yobuchopho inayo, kodwa eyona nto ibonakalayo kwingingqi ye-occipital.Isingqisho se-alpha ngowona msebenzi wesiqhelo we-EEG kubantu abadala nakubantwana abadala xa amehlo abo ephaphile kwaye evaliwe, kwaye isingqisho samaza e-alpha ebantwaneni sibonakala ngokuthe ngcembe ngokwabudala.
②β wave: i-frequency yi-14～30Hz, kwaye i-amplitude imalunga ne-5～30/μV, ebonakala ngakumbi kwindawo engaphambili, yesikhashana kunye neyombindi.Ukonyuka komsebenzi wengqondo kunye nemincili yeemvakalelo.Malunga ne-6% yabantu abaqhelekileyo basene-beta rhythm kwi-EEG erekhodiweyo naxa bezinzile ngengqondo kwaye amehlo evaliwe, ebizwa ngokuba yi-beta EEG.
③Theta wave: frequency 4～7Hz, amplitude 20～40μV.
④δ wave: frequency 0.5～3Hz, amplitude 10～20μV.Idla ngokuvela ebunzi.