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快速动眼期（rapid eye movement，REM）是动物睡眠的一个阶段，又称快速动眼睡眠。 在此睡眠阶段中，眼球会快速移动，同时身体肌肉放松。 快速眼动睡眠也被称作 异相睡眠 （paradoxical sleep, PS）或者去同步睡眠（desynchronized sleep），因为在这个阶段，大脑的神经元的活动与清醒的时候相同，呈现快速、低电压去同步化的脑电波。 控制REM睡眠的电化学活动似乎源于脑干，其特征为大量的神经递质乙酰胆碱，同时伴随着单胺类神经递质，包括组织胺、血清素和 …

2021年7月5日 · ram ও rom কি RAM এর কাজ হচ্ছে আপনি যে সফটওয়্যার (Software) ব্যবহার করতে চান তা হার্ডডিস্ক থেকে এনে নির্দেশ অনুযায়ী রান (run) করবে। তবে আমরা সরাসরি RAM কে নিদের্শ প্রদান করতে পারি না, CPU RAM কে নিদের্শ দিয়ে থাকে।.

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2021年2月6日 · रेम स्लीप (REM sleep) के दौरान आपका दिमाग बहुत सक्रिय होता है उतना ही जितना आप जागते समय होते हैं आपकी आंखें तेज़ी से पलक के अंदर चलती हैं और आपकी साँस (breathing), हृदय गति (heart rate) और रक्तचाप (blood pressure) बढ़ जाता है।.

2023年6月10日 · Trong chu kỳ giấc ngủ đầu tiên, sau khoảng 90 phút đi ngủ, giấc ngủ REM bắt đầu xuất hiện và chỉ kéo dài khoảng 10 phút. Vào những chu kỳ giấc ngủ tiếp theo, giấc ngủ REM của chúng ta kéo dài lâu hơn. Giấc ngủ REM cuối cùng có thể kéo dài đến 1 tiếng.

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Giấc ngủ bình thường có 2 chu kỳ: NREM (Non Rapid Eye Movement: giấc ngủ không chuyển động mắt nhanh) và REM (Rapid eye movement: giấc ngủ có chuyển động mắt nhanh). Trong đó, chu kỳ NREM chia thành 4 giai đoạn. Chu kỳ REM xen kẽ giữa các giai đoạn của NREM.