早在1910年,有科學家去除貓隻脊髓連接大腦的某一段落(橙色位置) ,發現貓隻依然能夠勉強地步行,確立了步姿並非由大腦百分百主宰的理論。502Please respect copyright.PENANAH0k5frwXXR502Please respect copyright.PENANA9habJPB0sz
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(圖2)後來經過一系列的證實,發現脊髓(Spinal cord)包含一系列的神經細胞,裡頭包含名為central pattern generator (CPG)的神經網路,負責協調我們的步姿(gait)。502Please respect copyright.PENANAXNhSc3Jzo8502Please respect copyright.PENANAVbBo3GrkDz
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動物的步姿因物種而異,例如袋鼠雙腿一同並行,兔仔慣常前腿左右互行,而後腿則一同並行。502Please respect copyright.PENANAqVxITYOpQN
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(圖3)有一款兔仔的品種名為Sauteur d’Alfort,牠們不但不懂得跳躍,而且經常會做出前腿行走後腿提高的奇異舉動。502Please respect copyright.PENANA7zuxVOrLZO502Please respect copyright.PENANALSxk8w9cJr
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直到最近科學家才剖析得到箇中的因由,原因是該品種的兔仔出現RORB蛋白質變異,導致位於脊髓的神經細胞沒法能夠產生足夠的RORB蛋白質。502Please respect copyright.PENANA9Z27eSQeaz
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含有RORB蛋白質的神經細胞相信是能夠避免神經訊息輸送時產生過激的功效。502Please respect copyright.PENANA7wF1rwxzkN
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而缺乏RORB蛋白質的兔仔大有可能是因為神經細胞所發出的指示不受控制,引致後腿肌肉伸展過激並因而提高的舉動。502Please respect copyright.PENANADY94naLXSp
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影片:https://www.youtube.com/watch?v=pV0SAKY5iTY502Please respect copyright.PENANAbUBenwddlJ
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如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。502Please respect copyright.PENANA6kzQG6DzCY
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc502Please respect copyright.PENANAHKsQZfKAiE
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。502Please respect copyright.PENANAx4OGmEVPEs
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Link:502Please respect copyright.PENANAAo4A4FdTG9
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio502Please respect copyright.PENANApcEgCH6nvx
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除非Facebook及IG重開侵侵的account,否則我的IG將不會再作更新,只會寄居本土LIHKG及Penana。502Please respect copyright.PENANAVNnQGDbDjv
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Ref1:https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1009429502Please respect copyright.PENANAIBPFV40ZHm
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科普專欄–薯不揀單
作者:
薯仔聞茱莉

篇 #197
三十秒科學–動物的步姿
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