作者:千與
人類不怎么喜歡贊同別人,但是,至少在一個(gè)問題上,絕大多數(shù)人的觀點(diǎn)是相同的:哪一只手更好用。我們中大約有85%的人更愿意選擇右手。英國利物浦大學(xué)的考古學(xué)家娜塔莉 烏米尼(Natalie Uomini)說:“從來沒有發(fā)現(xiàn)任何人類群體中使用左手者占多數(shù)”。圖1.我就要往右邊看
2014年來自中國科學(xué)院的方光戰(zhàn)博士以仙琴蛙(Babina daunchina)為對(duì)象,在其端腦和中腦左右兩側(cè)分別埋植電極,記錄聲音刺激下的腦電(EEG),分析其參數(shù)在不同刺激間、不同腦區(qū)間及不同時(shí)窗間的差異,以此探討蛙類存在右耳優(yōu)勢的可能性及其潛在機(jī)制。結(jié)果顯示對(duì)每種刺激而言,EEG參數(shù)隨時(shí)間的動(dòng)態(tài)變化僅出現(xiàn)在左側(cè)中腦。由于蛙類中腦主要接受對(duì)側(cè)聽神經(jīng)投射,所以蛙類存在右耳優(yōu)勢,而且這一優(yōu)勢受注意調(diào)節(jié)的影響。另外研究發(fā)現(xiàn)青蛙的鳴叫發(fā)聲系統(tǒng)也主要是在左側(cè)中腦。圖2.我是“左撇子”嗎?
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