The Guardian<\/a>.<\/p>\nUrm\u0103re\u0219te cele mai noi produc\u021bii video G4Media
\n– articolul continu\u0103 mai jos –<\/p>\n
P\u00e2n\u0103 de cur\u00e2nd, nici oamenii de \u0219tiin\u021b\u0103 nu aveau un r\u0103spuns clar. Explica\u021bia clasic\u0103 \u2014 c\u0103 ajut\u0103 la oxigenarea creierului \u2014 p\u0103rea logic\u0103. Dar, potrivit profesorului Andrew Gallup, specialist \u00een biologie comportamental\u0103 la Universitatea Johns Hopkins, aceast\u0103 teorie a fost demontat\u0103 de mult.<\/p>\n
\u201eC\u00e2nd \u00eei \u00eentreb pe oameni de ce cred c\u0103 c\u0103sc\u0103m, aproape to\u021bi spun c\u0103 are leg\u0103tur\u0103 cu respira\u021bia\u201d, explic\u0103 Gallup. \u201eDar experimentele arat\u0103 c\u0103 modificarea nivelului de oxigen sau de dioxid de carbon din aer nu schimb\u0103 frecven\u021ba c\u0103scatului.\u201d<\/p>\n
A\u0219adar, dac\u0103 nu are leg\u0103tur\u0103 cu aerul, atunci cu ce?<\/p>\n
Se pare c\u0103 c\u0103scatul este un fel de \u00eentindere localizat\u0103 a craniului \u2014 un mecanism fizic care stimuleaz\u0103 circula\u021bia s\u00e2ngelui la nivelul capului.<\/p>\n
\u201eC\u00e2nd \u00ee\u021bi \u00eentinzi mu\u0219chii, \u00ee\u021bi \u00eembun\u0103t\u0103\u021be\u0219ti circula\u021bia \u00een acea zon\u0103. Acela\u0219i lucru pare s\u0103 se \u00eent\u00e2mple \u0219i \u00een cazul craniului atunci c\u00e2nd c\u0103sc\u0103m\u201d, explic\u0103 Gallup.<\/p>\n
Cercet\u0103rile recente arat\u0103 c\u0103 acest gest m\u0103re\u0219te fluxul arterial spre creier \u0219i accelereaz\u0103 \u00eentoarcerea venoas\u0103, adic\u0103 circula\u021bia s\u00e2ngelui dinspre cap c\u0103tre inim\u0103. Practic, ajut\u0103 la \u201er\u0103cirea\u201d creierului \u2014 un fel de sistem natural de ventila\u021bie biologic\u0103.<\/p>\n
C\u00e2nd inspir\u0103m ad\u00e2nc, aerul trece peste suprafe\u021bele umede ale gurii, limbii \u0219i nasului, cre\u00e2nd un efect de \u201eradiator\u201d care disip\u0103 c\u0103ldura. Este motivul pentru care c\u0103scatul devine mai frecvent atunci c\u00e2nd afar\u0103 e cald, dar nu canicular \u2014 iar c\u00e2nd aerul devine prea fierbinte, corpul prefer\u0103 alte mecanisme de r\u0103cire, cum ar fi transpira\u021bia.<\/p>\n
O alt\u0103 teorie solid\u0103, complet\u00e2nd-o pe cea a termoregl\u0103rii, este cea a schimb\u0103rii st\u0103rii de con\u0219tien\u021b\u0103. C\u0103scatul ar ajuta creierul s\u0103 treac\u0103 de la somnolen\u021b\u0103 la vigilen\u021b\u0103, de la plictiseal\u0103 la aten\u021bie, regl\u00e2nd fluxul de s\u00e2nge \u0219i temperatura neuronal\u0103.<\/p>\n
\u201eEste posibil ca c\u0103scatul s\u0103 faciliteze trecerea de la re\u021belele cerebrale implicate \u00een visare \u0219i introspec\u021bie la cele responsabile de concentrare \u0219i ac\u021biune\u201d, explic\u0103 dr. Olivier Walusinski, istoric al medicinei.<\/p>\n
Pe scurt, ne preg\u0103te\u0219te pentru o nou\u0103 stare \u2014 un \u201ebuton de reset\u201d \u00eentre relaxare \u0219i activare.<\/p>\n
R\u0103m\u00e2ne misterul cel mai amuzant: de ce e c\u0103scatul molipsitor? De ce, c\u00e2nd cineva casc\u0103 l\u00e2ng\u0103 noi \u2014 sau chiar pe ecran \u2014 sim\u021bim nevoia s\u0103 facem la fel?<\/p>\n
Unii cercet\u0103tori cred c\u0103 acest fenomen ar fi un mecanism de coordonare social\u0103. \u00centr-un grup de animale, un val de c\u0103scate ar putea sincroniza nivelul de vigilen\u021b\u0103 sau de relaxare al membrilor, preg\u0103tindu-i fie pentru ac\u021biune, fie pentru odihn\u0103.<\/p>\n
Gallup sugereaz\u0103 \u0219i o alt\u0103 explica\u021bie: c\u0103scatul contagios ar putea fi un efect secundar al empatiei. Creierul nostru are a\u0219a-numi\u021bii neuroni oglind\u0103, care se activeaz\u0103 at\u00e2t c\u00e2nd facem o ac\u021biune, c\u00e2t \u0219i c\u00e2nd vedem pe altcineva f\u0103c\u00e2nd-o. Astfel, dac\u0103 vedem pe cineva c\u0103sc\u00e2nd, creierul nostru \u201eimita\u201d reflex acel comportament.<\/p>\n
Studiile pe lei, babuini \u0219i alte animale confirm\u0103 aceast\u0103 ipotez\u0103: atunci c\u00e2nd un individ casc\u0103 \u0219i apoi se ridic\u0103, ceilal\u021bi \u00eel urmeaz\u0103. C\u0103scatul devine, astfel, un semnal social subtil \u2014 o form\u0103 de empatie biologic\u0103.<\/p>\n
Departe de a fi un semn de plictiseal\u0103, c\u0103scatul este un mecanism benefic. El \u00eembun\u0103t\u0103\u021be\u0219te circula\u021bia, regleaz\u0103 temperatura creierului \u0219i ajut\u0103 la tranzi\u021bia dintre st\u0103ri mentale.<\/p>\n","protected":false},"excerpt":{"rendered":"Dimensiune text Mic\u0103 Normal\u0103 Mare O facem cu to\u021bii. De la copii la profesori, de la papagali la…\n","protected":false},"author":2,"featured_media":28461,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[32,33,12820,31,3018,36,37,27,74,34,35,25,12821,41,40,38,39,26,28,29,30,71,72,73],"class_list":{"0":"post-28460","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-international","8":"tag-breaking-news","9":"tag-breakingnews","10":"tag-cascat","11":"tag-cele-mai-populare-subiecte","12":"tag-creier","13":"tag-featured-news","14":"tag-featurednews","15":"tag-headlines","16":"tag-international","17":"tag-latest-news","18":"tag-latestnews","19":"tag-news","20":"tag-oboseala","21":"tag-ro","22":"tag-romana","23":"tag-romania","24":"tag-romanian","25":"tag-stiri","26":"tag-titluri","27":"tag-top-stories","28":"tag-topstories","29":"tag-world","30":"tag-world-news","31":"tag-worldnews"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@ro\/115441474161334361","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/posts\/28460","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/comments?post=28460"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/posts\/28460\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/media\/28461"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/media?parent=28460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/categories?post=28460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ro\/wp-json\/wp\/v2\/tags?post=28460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}