pet mri

With You By My Side - Eight

A/N: Closing in on the end here people. Just two more parts after this. Betaed by the wonderful @thorne93.

Characters: Jensen x Reader, Jared

Warnings: Fluff with a side of angst. 

Wordcount: 1842

Catch up HERE

*not my Gif*

Originally posted by hunterchesters

Because Jensen had to go back to Vancouver just a week after your wedding, you didn’t get a chance to go on a honeymoon. Not that you minded, it was nice just to be able to be with each other, to enjoy each other’s company for as long as you could before he was going back to work. You had also made a deal not to talk about your cancer until you got the results back from Germany, which would happen two weeks after filming started back up. Jensen had already arranged it so he could come with you.

“I want to ask you something,” Jensen said as the two of you lay in bed, stalling for as long as possible before you had to get up. “You can say no if you want.”

“You know I can’t say no to you,” you teased. “Shoot.”

“Do you want to maybe come with me to Vancouver? I just hate the thought of being without you.”

“Of course I’ll come. I’ll start packing when I get home tonight,” you said excitedly. You had wanted to go with him, but you knew how busy he was when filming and you didn’t want to impose.

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手作讓人類更聰明

我大概練習了300小時,才大致學會了阿歇爾晚期巴克斯谷地區工具製作者的類似技術。如果我有老師,或者能參加工具製作團體,學習過程應該可以再快一些。儘管打製研究的實驗已有數十年歷史,但目前仍然沒有任何關於學習過程的系統化研究。2008年,英國艾克斯特大學的考古學教授布萊德雷(Bruce Bradley)以及一位進行打製實驗的研究者一起邀請我,希望能運用我的知識來填補這道鴻溝。布萊德雷計畫訓練出英國學術界下一個世代的打製研究者,他認為我應該會想要順便蒐集一些神經影像,以便研究此學習過程。沒錯,我的確想要這麼做。

我想嘗試「擴散張量造影」(DTI)這種新技術,這種MRI方式可找出大腦白質纖維(也就是腦中的電纜線)的位置。2004年,時任德國雷根斯堡大學的德萊根斯基(Bogdan Draganski)透過DTI發現,學習拋球雜耍的受試者大腦出現了結構性的變化,這項發現挑戰了「成人大腦結構相對上已經定型」的傳統觀點。

我們懷疑,學習打製石器也會導致某種程度的神經重新連結。若真如此,我們就想知道哪些神經網路會改變。如果我們的想法正確,我們會希望知道製作工具是否能夠造成小規模的大腦結構變化,就像人類當初在演化過程中,大腦出現改變一樣。

結果十分確切,大腦確實會改變:我們在PET和MRI中發現,練習打製石器會讓額葉和頂葉區之間的白質纖維增加,包括前額葉的右下額葉回,那是負責認知操控的關鍵區域。大腦改變的程度可以透過受試者練習的時數來進行預測,練習越多,白質變化就越大。

大腦變化(神經科學家稱為「可塑性」)是一種表型調節,可提供演化變遷的原始資料。可塑性讓物種擁有嘗試新行為的彈性,讓自己的適應性有機會可以「突破限制」,如果恰好找到了新的技巧,就會成為牠們的行為之一,演化競賽就會跟著啟動:天擇會偏好那些在變異後能更輕鬆、更有效或更確實的學習者。因此,我們的研究結果提供了重要的證據,支持了「技藝人」假說。製作工具確實可能透過已知的演化機制來驅動大腦產生變化。……全文詳見《科學人》雜誌2016年5月號