Lub hlwb nyob rau hauv electromagnetic teb: qhov thib rau kev nkag siab ntawm kev xaav ntawm lub magnetic teb yog pom

2024 Tus sau: Seth Attwood | [email protected]. Kawg hloov kho: 2023-12-16 16:06

Cov kev sim hauv chav sim tau pom tias peb lub hlwb teb rau cov kev hloov pauv hauv lub ntiaj teb magnetic teb.

Ntau cov ntses, kab thiab, ntawm chav kawm, cov noog muaj peev xwm taug kev los ntawm magnetoreception - ib qho kev paub tshwj xeeb uas tso cai rau koj kom nkag siab txog cov kev taw qhia ntawm lub ntiaj teb magnetic teb. Nws ntseeg tau tias tib neeg tsis muaj nws, tab sis kev sim ua nrog kev tswj xyuas magnetic teb hauv chav kuaj tau pom tias magnetoreception muaj rau peb rau qee yam. Tab sis yog tias qhov tshwj xeeb rhiab protein pab cov noog hauv qhov no, qhov kev nkag siab ntawm cov hlau nplaum hauv peb lub cev tshwm sim li cas tseem yog qhov tsis paub meej.

Ib pab pawg kws tshawb fawb los ntawm Tebchaws Meskas thiab Nyij Pooj tham txog qhov kev sim tshiab hauv ib tsab xov xwm luam tawm hauv phau ntawv journal eNeuro. Shinsuke Shimojo, Joseph Kirschvink thiab lawv cov npoj yaig xaiv 26 tus neeg tuaj yeem pab dawb thiab muab tso rau lawv ib zaug hauv chav tsaus, tsis muaj suab nrov. Sab hauv, cov kws tshawb fawb tau tsim ib qho kev sib nqus hlau nplaum ntawm tib lub zog xws li geomagnetic teb ze ntawm lub ntiaj teb saum npoo, tab sis tib lub sijhawm lawv tuaj yeem hloov pauv kev coj ua ntawm nws txoj kab ntawm lub zog. Thaum lub magnetic teb tau tig, lub hlwb ua haujlwm ntawm txhua tus neeg ua haujlwm pab dawb tau sau tseg siv electroencephalograph (EEG).

Raws li cov kws sau ntawv, xws li kev sim teeb tsa ua rau nws muaj peev xwm simulate kev hloov pauv hauv cov lus qhia ntawm geomagnetic teb thaum lub zog. Nyob rau tib lub sijhawm, lub cev tseem nyob ruaj khov, yog li cov theem ntawm cov cim sensorimotor yog qhov tsawg, uas tso cai rau koj kom pom cov ntsiab lus ntawm lub hlwb zoo dua. Cov ntaub ntawv no tau muab piv nrog EEG cov ntaub ntawv ntawm cov neeg zaum hauv chav tsaus, uas qhov chaw sib nqus tsis hloov pauv txhua txoj kev. Nws tau pom tias thaum lub magnetic teb rotates counterclockwise, nthwv dej ntawm lub paj hlwb alpha atherosclerosis noticeably tsis muaj zog - lawv amplitude poob los ntawm qhov nruab nrab ntawm ib lub hlis twg.

Alpha nthwv dej tau cuam tshuam nrog lub xeev ntawm so kom tsaug zog uas ib tus neeg tsis tsom mus rau qhov muag lossis kev xav. Lawv tsis muaj zog sai li sai tau thaum lub paj hlwb pib nquag ua cov ntaub ntawv kev xav. Xws li ib qho poob tau sau tseg hauv cov neeg tuaj yeem pab dawb thaum lub chaw sib nqus tau hloov hauv tsev. Nyob rau hauv ib feem ntawm ib tug thib ob, alpha nthwv dej yuav tsum attenuated los ntawm mus txog rau 60 feem pua, qhia tias lub paj hlwb yog tibneeg hu tauj coob tsom xam cov ntaub ntawv sensory. Yuav ua li cas sib nqus teb tau pom, thiab yog vim li cas primates loj li peb xav tau qhov "ntxiv" kev xav ntawm tag nrho, tseem tsis meej.

Nws kuj tseem tsis tau xav txog tias lub caij nplooj zeeg ntawm alpha nthwv dej ua rau tsuas yog kev sib hloov ntawm lub magnetic teb counterclockwise (downward direction), raws li nws tshwm sim nyob rau sab qaum teb hemisphere ntawm lub ntiaj teb. Nyob rau hauv qhov kev coj rov qab (nce), tsis muaj kev hloov pauv hauv EEG tau pom - zoo li lub hlwb tsis quav ntsej txog qhov tsis paub tseeb thiab tsis mloog zoo rau nws. Lub peev xwm los "tawm" magnetoreception yog qhov tseeb pom los ntawm qee cov tsiaj thaum lawv ntsib kev cuam tshuam, "khib txawv" magnetic teb - piv txwv li, thaum muaj cua daj cua dub. Kuv xav tsis thoob tias cov txiaj ntsig yuav qhia qhov kev sim zoo sib xws nrog cov neeg nyob hauv sab qab teb hemisphere.

Joseph Kirshvink, tus xibfwb ntawm California Institute of Technology hais tias "Aristotle tau piav txog tsib qhov kev xav, suav nrog pom, hnov, hnov, saj, tsw thiab kov," "Txawm li cas los xij, nws tsis tau xav txog qhov kev xav ntawm lub ntiajteb txawj nqus, qhov kub thiab txias, qhov mob, qhov sib npaug thiab qee qhov stimuli sab hauv, uas, raws li peb tam sim no nkag siab, yog tag nrho ntawm peb lub paj hlwb. Txoj kev kawm ntawm peb cov poj koob yawm txwv tsiaj qhia tau hais tias qhov kev nkag siab ntawm geomagnetic teb kuj tuaj yeem nkag mus rau cov koob no - tsis yog rau thib rau, tab sis 10th, thiab tej zaum qhov kev nkag siab 11."