인간 은 왜 잠 을 잘까

�ΰ�� ڴ� ��¥ �� . �� ̳� �� ƴ϶� ü�� 鿪ü�� ü ��ɿ�� ߿��ϴٴ� �� ִ�.

�� ΰ�� ڴ�� ؼ�� ο� �ִ�. �뽺��ϴ�� ˶��(Ravi Allada) �� ĺ� �� ߿�� Ͱ� �� Ȱ��ȭ�� ʴ� ��̴�. �׸�� ǽ�� ִ� ��¿� �� Ƿθ� ȸ�� ִٴ� �͵� �ĺ� ��Ҵ�.

�ΰ�� ̳� �ĸ�, �� ĺ�� ռ� �� ĺ� ��Ұ� ��̶�� ĸ�� 浵 �ٰܴ� �� ִ�. �� ִ� �� ̷� �䱸 �� ϴ� �� ܴ�.

�� ̻�� Ҹ�� ӿ�� ڿ� ��µ�� ʰ� �� ߴ��ؿԴٴ� ��̴�. �� ũ�� REM(rapid eye movement sleep) �� REM(slow wave sleep) �� 2�� ִ�. ��ô� �� REM �� ۿ� �� ʾ�� REM �� ϴ� �� Ÿ�� ̴�.

��ִ� ȭ�� Ҹ�� ʱ�� ̴�. �� ߴ� �߻�� ̹� ��ߴ� �� ˷�� ִ� ��ʱ�� REM �� Ѵ�. �ٽ� �� 2�� 2,000�� Ҵ� �ʱ� �� REM �� ɼ�� ִٴ� ��̴�.

�� ñ� ��Ҵ� �� Ϻ� �� ļ�� REM �� Ѵ�. �� REM �� Ѵٰ� �� ִ�.

�׷��ٸ� �� REM �� ɱ�. REM �� ȭ�� λ깰�̶�� ִ�. �� ܱ÷�(Synapsid)�� 縷��(Amniote)��. �縷�� Ȱ��ϰ� �־�� ׿¼�� ༺ �� ȭ�Ѵ�.

��༺ �ܱ÷�� ð�� ϰ� ��ῡ Ȱ��Ѵ�. �̸� �� ڿ� �� ޺��κ�� ڽ�� Ű�� ٸ� �� Ű� ��Ŀ�� ȭ �� ¿��. �ٽ� �� ϰ� �ϴ� �ð�� ̸� ��ϰų� ��ȸ�� Ȱ�� ϰ� ��ڷκ�� ڽ�� ȣ�ϴ� Ȱ�� ð�� κ�� ӵ� ��̴�.

�� ȭ�ϸ鼭 �� ൿ�� ٲ�� 縷�� ϰ� �� ¸� ��REM ��, �� Ȱ�� REM �� ̾�� ֱ� �� Ÿ��ٴ� ��̴�. �� ̷� ��ȭ�� λ깰�� REM �� ¾�ٴ� �� ݾ�� ִ�.

��REM �� ΰ�� ޽� ��°� �� ݴ�� REM �� Ȱ��ȭ�ȴ�. REM �� ϴ� �� پ�� ۾�� Ѵ�. ��￡ �� ϴ� �� ˷�� ִ�. ��  �� س�� ϸ� �ų�� ϰ� ó�� б�� θ�԰� �� κ�� ̺�Ʈ��.

�� ڽ�� ƴϴ�. �̴� REM �� ǿ�� ·� �� ٽ� ��ֱ� ��̴�.

�� 迡�� Ͼ��  �ϳ�� ÷��ù�(flashback)�� ̳� �� ǰ�� ״�� ٽ� ��ϴ� PTSD(�ܻ� �� Ʈ�� )��. PTSD�� δ� �� ڵ�� ø��ų� ��̳� �չٴ�� ٽ� ��ϱ⵵ �Ѵ�. �� ̴� �� и�� Ͼ ��̴�.

�� ɸ��ڴ� ��ȥ�� ¡�İ� �ִ� �� ٴ� �޿� �� ߴ�. 1�⿡ ��ģ �� ȸ�� ٰ� �־�� . �ݴ�� ̷� �ݴ�� ̷� �� ٴ� �� Ⱓ �� ޴� �� ־��. �̷� �� REM �� ϴ� ��ȭ �� Ͼ �׿¼� ȹ�濡 �� ƴ϶� ��ȸ�� ν��ϴ� �� ߴ��߱� �� ִٴ� ��ڵ� �ִ�.

�� κ�� REM �� ü �� 10��15%�� Ѵ�. �ݸ� �ΰ�� 25% �� REM ��̴�. �ΰ�� ȸ�� ȣ �ۿ�� ϱ� ��̶�� м��̴�.

�� REM ��鿡 �ռ� �� REM �� ֵǴ� �� ۿ��̴�. �� Ű漼�� ó�� ϰ� �Ű� �� Ǿ� ��ü�� ̷��. �Ű� �� ó�� ð�� 鼭 ��ü�� ߻��Ѵ�. �� Ű� �� Ĵ�(��) �۾�� ʿ��ϴٴ� ��̴�.

�� 2012�� ӿ� �۸�� ý��(glymphatic system)�̶�� Ҹ�� ϴ� ��ô ��Ŀ�� ִٴ� �� ߰ߵƴ�. 2013�⿡�� ۸�� ý�� REM �� Ȱ��ٴ� �� ߰ߵƴ�. �۸�� ý��ۿ� �� û�ҵǴ� �� ӿ� �� ִ�� м�� ʾҴ�.

https://www.youtube.com/watch?v=ci5NMscKJws

�� ߿�� Ű� �� ԵǾ� �ִٴ� �� ֱ⵵ �ϴ�. �� ׷��ٸ� �� Ҹ�� ڴ�� ǹ�� Ű��޹�� ľ�� ̶�� ո�� ִ�.

�� ý�� ߴ��ϰ� �� ̷� �� ý�� ɼ�� ִ�. �� ظ��Ϸ�� ĸ� �� ϴ� ��ÿ� �� ְų� Ȱ��ϴ� 2�� ð��븸 ��ϴ� �ܼ�� ΰ� �� ظ��ϴ� �� Ʈ�� ִ�. �ٸ� �̷� �� ִ� �� Ʈ�� ü�� ý�� ߻� �ٰŸ� �� ̴�. �� ü�� ߸�� ɼ�� 󸶵�� ִ�. �� ӿ� �۽ο� �ִ�. �� ̰�� Ȯ�� ִ�.

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