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。531Please respect copyright.PENANAY1MDcKfc1s531Please respect copyright.PENANAtyPFs1ikpb
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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)。531Please respect copyright.PENANAEsqwK3hbMT531Please respect copyright.PENANALDvg24Ml7w
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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。531Please respect copyright.PENANAkMMuXIdenl
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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。531Please respect copyright.PENANAhz9Q9arwPV531Please respect copyright.PENANAOMdNNJUin0
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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。531Please respect copyright.PENANABsfn5oRtPH
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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。531Please respect copyright.PENANADWh5WfJVov
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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。531Please respect copyright.PENANAs1t00C0hVr
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影片:https://www.youtube.com/watch?v=pV0SAKY5iTY531Please respect copyright.PENANAxGL4QoDuAy
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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。531Please respect copyright.PENANA4ZxoepLTr5
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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/toc531Please respect copyright.PENANA4ua1Sdeihw
531Please respect copyright.PENANAPYRQlheAWd
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。531Please respect copyright.PENANAT6GcKo0lxk
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Link:531Please respect copyright.PENANAWjcsCRGSMl
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio531Please respect copyright.PENANAX3jgqJqcK4
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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。531Please respect copyright.PENANAiK9KyxC23u
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Ref1:https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1009429531Please respect copyright.PENANAWqTZ7RDAwj
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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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