{"id":3490,"date":"2015-09-14T00:24:54","date_gmt":"2015-09-13T21:24:54","guid":{"rendered":"http:\/\/bilimvegelecek.com.tr\/?p=3490"},"modified":"2015-09-14T00:24:54","modified_gmt":"2015-09-13T21:24:54","slug":"beyindeki-hafiza-bolumu-sorunlarin-cozumunde-de-rol-aliyor","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2015\/09\/14\/beyindeki-hafiza-bolumu-sorunlarin-cozumunde-de-rol-aliyor","title":{"rendered":"Beyindeki haf\u0131za b\u00f6l\u00fcm\u00fc sorunlar\u0131n \u00e7\u00f6z\u00fcm\u00fcnde de rol al\u0131yor"},"content":{"rendered":"

G\u00f6rsel a\u00e7\u0131klamas\u0131:<\/strong> Hipokampus, problemlerin ba\u015far\u0131l\u0131 bir \u015fekilde \u00e7\u00f6z\u00fcld\u00fc\u011f\u00fc zamanlarda k\u0131smen aktif durumda.<\/p>\n

Hipokampus sayesinde h\u0131zl\u0131 ve ba\u015far\u0131l\u0131 kararlar verebiliyoruz. Beynin temporal lobunda yer alan hipokampus b\u00f6lgesi, sadece uzun d\u00f6nemli haf\u0131zayla ilintili de\u011fil. Ara\u015ft\u0131rmac\u0131lar ilk defa hipokampusun anla\u015fmazl\u0131klar\u0131n \u00e7\u00f6z\u00fcmlenmesinde de rol ald\u0131\u011f\u0131n\u0131 ortaya \u00e7\u0131kard\u0131. Bochum Ruhr \u00dcniversitesi\u2019nden Nikolai Axmacher, \u00e7al\u0131\u015fma arkada\u015flar\u0131 ile birlikte, ara\u015ft\u0131rmalar\u0131n\u0131n sonu\u00e7lar\u0131n\u0131 Current Biology<\/em> (G\u00fcncel Biyoloji) dergisinde yay\u0131mlad\u0131.<\/p>\n

Karars\u0131zl\u0131klar g\u00fcn i\u00e7inde s\u0131kl\u0131kla kar\u015f\u0131m\u0131za \u00e7\u0131kmakta<\/em><\/strong><\/p>\n

\u0130nsanlar g\u00fcnl\u00fck ya\u015fam\u0131nda s\u0131k s\u0131k karars\u0131zl\u0131klarla kar\u015f\u0131la\u015fmakta, \u00f6zellikle normalde yapacaklar\u0131 \u015feyleri yapmamalar\u0131 gerekti\u011finde, \u00f6rne\u011fin yayalara ye\u015fil yanarken h\u0131zl\u0131ca yakla\u015fan bir arabay\u0131 g\u00f6rmek ve kar\u015f\u0131ya ge\u00e7ip ge\u00e7memenin sorgulanmas\u0131nda oldu\u011fu gibi. Deneyde bu karar mekanizmas\u0131n\u0131n nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 anlamak i\u00e7in kat\u0131l\u0131mc\u0131lara \u201csesli\u201d ve \u201csessiz\u201d kelimeleri, sesli ya da sessiz bir bi\u00e7imde s\u00f6ylendi ve ve s\u00f6ylenen kelime ne olursa olsun, onun g\u00fcr\u00fclt\u00fc d\u00fczeyini belirtmeleri istendi. E\u011fer durum s\u00f6ylenen kelime ile z\u0131tl\u0131k i\u00e7erisinde ise, kat\u0131l\u0131mc\u0131lar kararlar\u0131n\u0131 daha yava\u015f verme e\u011filiminde oldu ve daha \u00e7ok hata yapmaya meyilliydiler.<\/p>\n

Sonu\u00e7lar iki farkl\u0131 \u00f6l\u00e7\u00fcm metoduyla onayland\u0131<\/em><\/strong><\/p>\n

Axmacher, hipokampusun zor se\u00e7imler s\u0131ras\u0131nda \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 iki farkl\u0131 y\u00f6ntemle test etti. Bunlardan biri olan fonksiyonel manyetik rezonans g\u00f6r\u00fcnt\u00fcleme (fMRI) sa\u011fl\u0131kl\u0131 kat\u0131l\u0131mc\u0131lara uyguland\u0131. Di\u011fer y\u00f6ntem olan elektro ensefalogram (EEG) ise beyninde elektrotlar ba\u011fl\u0131 olan epilepsi hastas\u0131 kat\u0131l\u0131mc\u0131lara uyguland\u0131. \u0130ki farkl\u0131 \u00f6l\u00e7\u00fcm tekni\u011finden al\u0131nan sonu\u00e7lar \u00f6rt\u00fc\u015f\u00fcyordu, hipokampus zor se\u00e7imlere dahil oluyordu.<\/p>\n

Haf\u0131za sistemi, problem \u00e7\u00f6z\u00fcm y\u00f6nteminden yola \u00e7\u0131karak ayd\u0131nlat\u0131labilir<\/em><\/strong><\/p>\n

Bonn \u00dcniversitesi Hastanesi\u2019nde epileptoloji dal\u0131nda g\u00f6rev alan Carina Oehrn, \u00e7al\u0131\u015fmayla ilgili \u201cElde etti\u011fimiz bilgiler, \u00f6ncelikle hipokampusun daha \u00f6nceki fark edilmemi\u015f bir i\u015flevini -karars\u0131zl\u0131klar\u0131 \u00e7\u00f6z\u00fcmlemek- a\u00e7\u0131\u011fa \u00e7\u0131kartt\u0131\u201d diyor.<\/p>\n

Axmacher ise sonu\u00e7lar hakk\u0131nda \u00a0\u015f\u00f6yle konu\u015ftu: \u201cYine de bu i\u015flevin haf\u0131za sistemi ile -varsa- etkile\u015fimlerini \u00e7\u00f6zmek i\u00e7in yeni deneyler yapmak zorunday\u0131z. Belki haf\u0131za sistemi, bir problem ba\u015far\u0131yla \u00e7\u00f6z\u00fcld\u00fc\u011f\u00fcnde, k\u0131smen aktif konuma ge\u00e7iyor olabilir. \u00c7\u00f6z\u00fclmemi\u015f problemler, gelecekte kullan\u0131lmak \u00fczere deneyimler olarak kaydedilmiyor. Bizim g\u00f6r\u00fc\u015f\u00fcm\u00fcze g\u00f6re beyin burada bir \u00e7e\u015fit filtre rol\u00fcn\u00fc oynuyor. Standart olaylarda ve \u00e7\u00f6z\u00fclmemi\u015f problemlerle ilgilenmeyip \u00e7\u00f6z\u00fclen b\u00fcy\u00fck problemleri se\u00e7iyor. Tabii ki bu hipotezimizi desteklemek i\u00e7in daha fazla deney yapmal\u0131y\u0131z.\u201d<\/p>\n

\u00a0<\/strong><\/p>\n

\u00c7eviren: Nazif Ta\u015fba\u015f<\/strong><\/p>\n

\u0130T\u00dc Molek\u00fcler Biyoloji ve Genetik B\u00f6l\u00fcm\u00fc<\/strong><\/em><\/p>\n

Kaynak: http:\/\/www.sciencedaily.com\/releases\/2015\/08\/150820134704.htm<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

G\u00f6rsel a\u00e7\u0131klamas\u0131: Hipokampus, problemlerin ba\u015far\u0131l\u0131 bir \u015fekilde \u00e7\u00f6z\u00fcld\u00fc\u011f\u00fc zamanlarda k\u0131smen aktif durumda. Hipokampus sayesinde h\u0131zl\u0131 ve ba\u015far\u0131l\u0131 kararlar verebiliyoruz. Beynin temporal lobunda yer alan hipokampus b\u00f6lgesi, sadece uzun d\u00f6nemli haf\u0131zayla ilintili de\u011fil. Ara\u015ft\u0131rmac\u0131lar ilk defa hipokampusun anla\u015fmazl\u0131klar\u0131n \u00e7\u00f6z\u00fcmlenmesinde de rol ald\u0131\u011f\u0131n\u0131 ortaya \u00e7\u0131kard\u0131. Bochum Ruhr \u00dcniversitesi\u2019nden Nikolai Axmacher, \u00e7al\u0131\u015fma arkada\u015flar\u0131 ile birlikte, ara\u015ft\u0131rmalar\u0131n\u0131n sonu\u00e7lar\u0131n\u0131 Current […]<\/p>\n","protected":false},"author":1,"featured_media":3494,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,35],"tags":[],"class_list":["post-3490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","category-noroloji"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t