{"id":707357,"date":"2026-08-09T11:56:03","date_gmt":"2026-08-09T11:56:03","guid":{"rendered":"https:\/\/microscopemedia.com\/?p=707357"},"modified":"2026-08-09T11:56:03","modified_gmt":"2026-08-09T11:56:03","slug":"fantomele-din-creier-care-pastreaza-amintirile-uitate-ce-au-descoperit-cercetatorii","status":"publish","type":"post","link":"https:\/\/microscopemedia.com\/?p=707357","title":{"rendered":"\u201eFantomele\u201d din creier care p\u0103streaz\u0103 amintirile uitate. Ce au descoperit cercet\u0103torii"},"content":{"rendered":"
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A\u0219adar, ceea ce este uitat s-ar putea s\u0103 nu fie pierdut \u2013 cel pu\u021bin \u00een cazul musculi\u021belor de o\u021bet.<\/p>\n

Chiar \u0219i dup\u0103 ce o amintire nu mai poate fi accesat\u0103, aceasta poate persista \u00eentr-o stare ascuns\u0103 \u00een creierul musculi\u021belor de o\u021bet, gata s\u0103 fie reactivat\u0103 de indiciul potrivit, au descoperit cercet\u0103torii.<\/p>\n

Exist\u0103 \u00eens\u0103 o problem\u0103: procesul de recuperare a unei amintiri uitate poate duce \u0219i la apari\u021bia unor amintiri false, potrivit unei echipe de cercet\u0103torii \u00een neuro\u0219tiin\u021be.<\/p>\n

\u201eAm descoperit la Drosophila c\u0103 amintirile uitate pot persista sub forma unor urme de memorie silen\u021bioase \u00een circuite care nu au capacitatea de a ghida comportamentul\u201d, scriu cercet\u0103torii \u00eentr-un studiu publicat \u00een Nature Neuroscience, arat\u0103 ScienceAlert<\/a>.<\/p>\n

Experien\u021bele recente, un factor determinant<\/h2>\n

\u201eConcluzion\u0103m c\u0103 trecerea \u00eentre st\u0103rile de memorie silen\u021bioas\u0103 \u0219i activ\u0103 previne pierderea informa\u021biilor \u0219i creeaz\u0103 un sistem de memorie condi\u021bionat, care permite creierului s\u0103 stabileasc\u0103 \u00een mod flexibil ce amintiri s\u0103 recupereze, \u00een func\u021bie de experien\u021bele recente\u201d.<\/p>\n

Amintirile sunt, \u00een mod notoriu, alunecoase. Putem s\u0103 ne amintim cu o claritate uimitoare momente de acum c\u00e2teva decenii, iar alteori ne putem trezi privind printr-o camer\u0103 \u0219i \u00eencerc\u00e2nd s\u0103 ne d\u0103m seama de ce am intrat acolo cu doar c\u00e2teva secunde \u00eenainte.<\/p>\n

Cercet\u0103torii \u00een neuro\u0219tiin\u021be au ajuns s\u0103 \u00een\u021beleag\u0103 c\u0103, de\u0219i unele amintiri pot fi \u0219terse definitiv, altele pot r\u0103m\u00e2ne \u00eentr-o stare inaccesibil\u0103 \u0219i pot fi recuperate cu ajutorul unor indicii.<\/p>\n

\u00cens\u0103 aceste indicii pot deforma amintirea, \u00een special \u00een cazul \u00eentreb\u0103rilor sugestive. Iar despre procesele cerebrale care stau la baza reconstruc\u021biei amintirilor uitate se cunosc \u00eenc\u0103 foarte pu\u021bine lucruri, inclusiv despre m\u0103sura \u00een care rezultatul este o amintire real\u0103 sau una fals\u0103.<\/p>\n

Pentru a investiga acest fenomen, cercet\u0103torii s-au orientat c\u0103tre unul dintre organismele-model preferate \u00een neuro\u0219tiin\u021b\u0103 \u2013 musculi\u021ba de o\u021bet.<\/p>\n

Musculi\u021bele pot fi antrenate s\u0103 asocieze un anumit miros cu un \u0219oc electric u\u0219or, ceea ce le determin\u0103 s\u0103 evite acel miros. Echipa a constatat c\u0103 aceast\u0103 aversiune \u00eenv\u0103\u021bat\u0103 a disp\u0103rut \u00een aproximativ 24 de ore, suger\u00e2nd c\u0103 amintirea fusese uitat\u0103.<\/p>\n

S-a \u00eent\u00e2mplat ceva nea\u0219teptat<\/h2>\n

C\u00e2nd cercet\u0103torii au pus musculi\u021bele din nou \u00een camera \u00een care avusese loc antrenamentul pentru evitarea mirosului, amintirea a revenit, iar insectele au \u00eenceput din nou s\u0103 evite mirosul respectiv.<\/p>\n

Dar mirosul, singur, nu era suficient. Indiciul trebuia s\u0103 recreeze elemente importante ale experien\u021bei ini\u021biale \u2013 inclusiv textura \u0219i iluminarea camerei \u2013 \u00eenainte ca amintirea uitat\u0103 s\u0103 reapar\u0103.<\/p>\n

Rezultatele sugereaz\u0103 c\u0103 indicii contextuali, precum textura \u0219i lumina, sunt importante pentru recuperarea amintirilor, ceea ce indic\u0103 faptul c\u0103 memoria nu este pur \u0219i simplu \u201ereluat\u0103\u201d, ci reconstruit\u0103.<\/p>\n

Pentru a afla ce se \u00eent\u00e2mpla efectiv \u00een creier \u00een acest proces, cercet\u0103torii au \u00eenregistrat activitatea din centrii memoriei ai creierului musculi\u021belor.<\/p>\n

Ei au descoperit c\u0103, pe m\u0103sur\u0103 ce insectele p\u0103reau s\u0103 uite, urma de memorie care determina comportamentul de evitare se estompa treptat. \u00cen acela\u0219i timp, o alt\u0103 urm\u0103, ascuns\u0103, devenea vizibil\u0103 \u00eentr-un alt grup de neuroni, care \u00een mod normal nu influen\u021beaz\u0103 comportamentul.<\/p>\n

Cercet\u0103torii au numit-o \u201eurm\u0103 de memorie silen\u021bioas\u0103\u201d<\/h2>\n

C\u00e2nd toate indiciile de reamintire se aliniau, activitatea se muta din nou c\u0103tre neuronii implica\u021bi \u00een comportamentul de evitare, permi\u021b\u00e2nd astfel amintirii s\u0103 influen\u021beze din nou comportamentul musculi\u021belor.<\/p>\n

Oamenii de \u0219tiin\u021b\u0103 suspecteaz\u0103, de asemenea, c\u0103 activitatea cerebral\u0103 responsabil\u0103 pentru \u00eengreunarea accesului la anumite amintiri ar putea contribui simultan la crearea acestei versiuni de rezerv\u0103, de\u0219i ipoteza trebuie \u00eenc\u0103 testat\u0103.<\/p>\n","protected":false},"excerpt":{"rendered":"

A\u0219adar, ceea ce este uitat s-ar putea s\u0103 nu fie pierdut \u2013 cel pu\u021bin \u00een cazul musculi\u021belor de o\u021bet. Chiar \u0219i dup\u0103 ce o amintire nu mai poate fi accesat\u0103, … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":707358,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"Default","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/707357"}],"collection":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=707357"}],"version-history":[{"count":0,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/707357\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/media\/707358"}],"wp:attachment":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=707357"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=707357"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=707357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}