下丘腦是什麼？

下丘腦是大腦的包含多個具有多種功能的小核的一部分。下丘腦的最重要的功能之一就是要連結到通過腦垂體（垂體) 內分泌系統的中樞神經系統。

下丘腦位於下麵的丘腦、腦幹的正上方。神經解剖學的術語，它構成間腦的腹側部分。所有的脊椎動物大腦中含有下丘腦。在人類中，大約是杏仁的大小。

下丘腦負責某些新陳代謝過程和自主神經系統的其他活動。它合成和分泌神經激素，通常稱為下丘腦釋放激素，和這些反過來刺激或抑制垂體荷爾蒙的分泌。

下丘腦控制人體溫度、饑渴、疲勞和晝夜週期。

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