冬天到來,各動物均出盡渾身解數迎接大自然給予的挑戰,譬如老生常談的燕子南遷及松鼠冬眠等等。883Please respect copyright.PENANAR4D7Pr8ZVT883Please respect copyright.PENANAauhtvzF5O9
883Please respect copyright.PENANAhnUrQaSqr6
(圖2)而今次將要介紹的主角,就是體積非常細小的小臭鼩(Etruscan shrew)。883Please respect copyright.PENANAQVGiCzT4gL883Please respect copyright.PENANAvlPA6gVD7s
883Please respect copyright.PENANAv1k5dfzA18
(圖3)冬天期間,小臭鼩(Etruscan shrew)的大腦皮層厚度會相應減少。883Please respect copyright.PENANALxs3ssexkj
從圖中可見,唯獨是L4區域有所縮細,其他區域並無顯著改變。883Please respect copyright.PENANA3CveIcLkcd883Please respect copyright.PENANAszU42TmuaB
883Please respect copyright.PENANAVTM9yCrSJH
(圖4)有趣的是,在夏天期間,若果食物供應不足夠的話,小臭鼩(Etruscan shrew)的大腦皮層厚度亦會相應減少。883Please respect copyright.PENANAusYQI1yV9t
但若果食物供應足夠的話,則不會出現「腦細」的情況。883Please respect copyright.PENANADtkPbwqdCO883Please respect copyright.PENANAPL9sBXkdUR
883Please respect copyright.PENANAv1ZEDI2K2P
(圖5)之所出現「腦細」的其中一個原因,相信是與新陳代謝有關。883Please respect copyright.PENANAMZKacunYZj
對比其他區域,L4區域含有最高濃度的Cytochrome oxidase(CO)蛋白酶,883Please respect copyright.PENANAbRoAZF3CFV
而CO蛋白酶的功用則為製造能源。883Please respect copyright.PENANAdpOTtEUCPc883Please respect copyright.PENANAOWhJ0aoETk
883Please respect copyright.PENANA0VJC84YLKu
這暗示出可能小臭鼩為了應對冬天食物短缺問題,所以索性盡量棄用與新陳代謝有關的部份,以作節省資源。883Please respect copyright.PENANARD6Y7WGUQC
883Please respect copyright.PENANAt7Wx7BzYoP
當然,亦不排除有其他的可能性。883Please respect copyright.PENANAsJRtW0mb0r
883Please respect copyright.PENANAsK9OZkfoQH
(圖6)圖中為大腦皮層磁力共振得出的影像。883Please respect copyright.PENANAnpXoa3W6qI
藍綠色為冬天的時候,而橙黃色則為夏天時候。883Please respect copyright.PENANA32X56Oh1XA883Please respect copyright.PENANAyGD3O1ySr0
883Please respect copyright.PENANA8vg6hsssjM
冬天和夏天的影像互相重疊後,橙黃色的區域較多,顯示夏天的腦部體積較冬天的為大。883Please respect copyright.PENANAN6kTG2pGR5
883Please respect copyright.PENANAe5gbRjVJBT
平均來說,小臭鼩在冬天時候的大腦皮層厚度會縮減28%左右,但在下一年夏天的時候則會完全恢復回原有的厚度。883Please respect copyright.PENANAwNJkg11xgI
883Please respect copyright.PENANABCybEOE0cb
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。883Please respect copyright.PENANAnS1cHe8fZO
883Please respect copyright.PENANAkEsp4cmpQ7
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/toc883Please respect copyright.PENANAuNVImBwjIC
883Please respect copyright.PENANA0UfHmWcU5v
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。883Please respect copyright.PENANAGDIGuVTWGx
883Please respect copyright.PENANALtzoK8758n
Link:883Please respect copyright.PENANAhI8nNA9G4I
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio883Please respect copyright.PENANAci6fuSCDE9
883Please respect copyright.PENANAQdBPCz4TQi
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。883Please respect copyright.PENANAuUULuBUOUW
883Please respect copyright.PENANAgkKhrqVGoP
https://www.instagram.com/potatopigtongue/883Please respect copyright.PENANAiuiWU4k5RL
883Please respect copyright.PENANATmjG1PuUSP
Ref1:https://www.pnas.org/content/early/2020/11/24/1922888117883Please respect copyright.PENANAcgLZvoLiZL
arrow_back
科普專欄–薯不揀單
more_vert
-
info_outline 資料
-
toc 目錄
-
share 分享
-
format_color_text 介面設置
-
exposure_plus_1 推薦
-
打賞
-
report_problem 檢舉
-
account_circle 登入
X
科普專欄–薯不揀單
作者:
薯仔聞茱莉

篇 #117
深入淺出–動物過冬的一道奇謀
喜歡 2
閱讀 879
書籤 150
campaign
催更 0
打賞

按此加載下一章
X
每次催更後,作者都會收到通知!
smartphone100 → 催更
×
寫下你喜歡這個故事的地方
×
對此喜歡的人