科普專欄–薯不揀單 - 三十秒科學–動物的步姿

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。468Please respect copyright.ＰＥＮＡＮＡc4h3WO35yV
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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)。468Please respect copyright.ＰＥＮＡＮＡgxCs0ZzAmh
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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。468Please respect copyright.ＰＥＮＡＮＡ6MaXuVJd5B
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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。468Please respect copyright.ＰＥＮＡＮＡw1IXwPcpzU
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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。468Please respect copyright.ＰＥＮＡＮＡqLQKoVxRwx
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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。468Please respect copyright.ＰＥＮＡＮＡGrKd5E0EsA
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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。468Please respect copyright.ＰＥＮＡＮＡ8KdYAWnlzP
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影片:https://www.youtube.com/watch?v=pV0SAKY5iTY468Please respect copyright.ＰＥＮＡＮＡk00P2LzyKU
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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。468Please respect copyright.ＰＥＮＡＮＡgkNaGtm2qA
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Ref1:https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1009429468Please respect copyright.ＰＥＮＡＮＡ8vpMSGzvmA

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