It has been almost a week since the cherry blossom declaration was announced, but the nearby cherry blossoms are only about 70% in bloom. The morning temperature is around 5-6 degrees Celsius, and during the day it is around 15 degrees, so there is a feeling of “Hanabie (flower cold)” . It’s too much trouble to go outside when it’s cold, and I tend to stay indoors. However, the sunshine that shines through the window feels warm and I tend to doze off. And the dream I had was like the picture as an image. A dream is a kind of hallucination that feels like a real experience during sleep. There are still many things that are not understood about sleep, but it has been found that there are REM sleep and non-REM sleep in brain activity during sleep, and in 1957 it was revealed that dreams are mainly observed during the REM sleep state. It seems that an average of 3-5 dreams are seen in one night, and incoherent dreams may be a result of overlapping of these 3-5 dreams.

開花宣言が発せられてからほぼ１週間経ちますが、近くの桜はまだせいぜい七分咲きといったところです。朝の気温は5、6度、昼間も15度前後ですから、全く花冷えといった感じなのでしょう。寒いと外に出るのは億劫で、どうしても家の中に引き篭もりがちになります。それでもやはり春、窓から差し込む日差しは暖かく、ついウトウトとしてしまいます。そして見た夢が、イメージとしては写真の様な夢でした。夢とは、睡眠中あたかも現実の経験であるかの様に感じる、一種の幻覚です。睡眠に関してはまだまだ分かっていないことが多いらしいですが、睡眠中の脳活動にはレム睡眠とノンレム睡眠があって、1957年に夢は主にレム睡眠の状態にみられる現象であることが明らかになったそうです。一晩に平均３〜５つの夢を見るそうで、支離滅裂な夢はこの〜５つの夢が重なるからでしょうね。