人之初，性本善。這句說話在現今科學上究竟站不站著腳呢?586Please respect copyright.ＰＥＮＡＮＡ5eWBKgTa4B
586Please respect copyright.ＰＥＮＡＮＡyMKBia1OKp
586Please respect copyright.ＰＥＮＡＮＡ9N2GgGXFfd
(圖2)我們腦部有一隻蛋白酶名為Monoamine oxidase A (MAOA)，它的功用是分解多巴胺(Dopamine)及血清素(Serotonin)，防止這些物質過量聚集在腦部，避免神經線因這些物質過量聚集而影響正常運作。586Please respect copyright.ＰＥＮＡＮＡva81eq4Q1L
586Please respect copyright.ＰＥＮＡＮＡAmrDARRriA
586Please respect copyright.ＰＥＮＡＮＡOxrl6WfPcz
另一方面來看，若MAOA蛋白酶過量產生在大腦裡頭的話，人們便會因血清素過低而陷入抑鬱症狀，因此早期亦有抗抑鬱藥物的設計是抑制MAOA的運作，盡量減少血清素的分解。586Please respect copyright.ＰＥＮＡＮＡFuidBUphg1
586Please respect copyright.ＰＥＮＡＮＡS6Hj5aYmv5
(圖3)研究發現，無論人類、老鼠及馬騮，若MAOA基因出現先天性的變異，因而導致腦部的MAOA蛋白酶數量偏少的話，腦部相關的神經物質過量類累積，導致暴力舉動及情緒激動等負面傾向的出現，醫學界命名此疾病為Brunner syndrome，病人較大傾向會犯下縱火、暴力及性罪行。586Please respect copyright.ＰＥＮＡＮＡjzhjHx6RpH
586Please respect copyright.ＰＥＮＡＮＡ969JN1mvC9
586Please respect copyright.ＰＥＮＡＮＡ6KgW65yjOG
而基於這MAOA的基因是位於X染色體裡，男性(只有一條X染色體)出現此病的機率會高於女性(擁有兩條X染色體)，這是因為兩條X染色體同時出現變異的機率比一條X染色體出現變異較低。586Please respect copyright.ＰＥＮＡＮＡeeDuR36xsj
586Please respect copyright.ＰＥＮＡＮＡKJd1Hmwu8h
雖則後天教育對個人發展有著極為深厚的影響，但在先天性MAOA基因變異的前提下，有一部份人一出生便已經不是性本善了。586Please respect copyright.ＰＥＮＡＮＡOYoqBXcWn9
586Please respect copyright.ＰＥＮＡＮＡqAp9GKFSKY
586Please respect copyright.ＰＥＮＡＮＡuYZ0V7tv9f
586Please respect copyright.ＰＥＮＡＮＡXrYBGIc97c
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。586Please respect copyright.ＰＥＮＡＮＡlNI2Yo2W1X
586Please respect copyright.ＰＥＮＡＮＡSoKbyLOemB
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/toc586Please respect copyright.ＰＥＮＡＮＡgnRWKZqzV9
586Please respect copyright.ＰＥＮＡＮＡUgA064Dp7f
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。586Please respect copyright.ＰＥＮＡＮＡmn5k2EpD1b
586Please respect copyright.ＰＥＮＡＮＡNMj30dxnqE
Link:586Please respect copyright.ＰＥＮＡＮＡYQ4frE1r5Z
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio586Please respect copyright.ＰＥＮＡＮＡW30eU4UHO5
586Please respect copyright.ＰＥＮＡＮＡbeAIZu4Lqp
586Please respect copyright.ＰＥＮＡＮＡPqEAPXiW0n
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。586Please respect copyright.ＰＥＮＡＮＡSBnNGAOK9r
586Please respect copyright.ＰＥＮＡＮＡVeIPUexPjQ
Ref1:https://science.sciencemag.org/content/304/5672/818.1.full586Please respect copyright.ＰＥＮＡＮＡQ0g68gq3s3
Ref2:https://science.sciencemag.org/content/sci/262/5133/578.full.pdf
586Please respect copyright.ＰＥＮＡＮＡ3Fwjip4qMg
