Common sense


50?€ ์ค‘๋ฐ˜๋ถ€?ฐ๋Š” ?ฌ๊ธฐ๊พ?๋ช??Œ์•„๋ณธ๋‹ค 12/13/2012


??๊ธฐ๋Šฅ ?€?˜๋กœ ?ฌ๋žŒ ๋ณด๋Š” ???๋ ค??

?˜์ด ???ฌ๋žŒ?€ ???ฌ๊ธฐ๋ฅ????นํ• ๊น? ๊ท??ด์œ ????๊ธฐ๋Šฅ ?€?˜์— ?ˆ๋Š” ๊ฒƒ์œผ๋ก?๋ฐํ?์กŒ๋‹ค. 50?€ ์ค‘๋ฐ˜๋ถ€?ฐ๋Š” ?Œ์—???์˜ค๊ฐ์„ ๊ด€?ฅํ•˜???˜์ „์ธก๋‡Œ?ฌ์—ฝ??๋ถ€?„๊? ?œ๋?๋ก?๊ธฐ๋Šฅ?˜์? ๋ชปํ•œ?ค๋Š” ๊ฒƒ์ด??

??๋ถ€?„๋Š” ? ์šฉ?????†๋Š” ?ผ๊ตด???๋ณ„?˜๋Š” ??์ค‘์š”????• ???œ๋‹ค. ๊ทธ๋Ÿฌ???ฌ๋žŒ ๋ณด๋Š” ?ˆ์ด ?๋ ค์ง€??๊ฒƒ์? ?„์—ฐ?ด๋‹ค. ์ง€??์ฃ?๋ฏธ๊ตญ UCLA ?ฌ๋ฆฌ?™๊ณผ???ฐ๊ตฌ?€???˜๋? ๊ต?ฆฝ๊ณผํ•™???Œ๋ณด(Proceedings of the National Academy of Sciences)?™์— ๋ฐœํ‘œ??2?ธ์˜ ?ผ๋ฌธ??๋ณด์ž.

์ฒ??คํ—˜?€ 55~84?ธ์˜ ?ฑ์ธ 119๋ช??‰๊ท  68??๊ณ??Š์???24๋ช??‰๊ท  23?????€?์œผ๋ก??ˆ๋‹ค. ?ด๋“ค?๊ฒŒ 30๋ช…์˜ ?ผ๊ตด ?ฌ์ง„??๋ณด์—ฌ์ฃผ๊ณ  ?ผ๋งˆ??๋ฏฟ์Œ์งํ•˜๋ฉ??ค๊?๊ฐˆ๋งŒ???ฌ๋žŒ?ผ๋กœ ๋ณด์ด?”์? ?‰๊??˜๊ฒŒ ?ˆ๋‹ค. ?ผ๊ตด ?ฌ์ง„?€ ๊ฐ๊??์œผ๋ก?๋ณ????˜๋??Œ์ง?œโ€??˜๊ทธ?€ ๊ทธ๋Ÿฐ???˜์‹ ?ฉํ•  ???†๋Š”?™์˜ 3์ข…๋ฅ˜๋ฅ?๊ณจ๋ผ???œ์‹œ?ˆ๋‹ค.

๊ท?๊ฒฐ๊ณผ ?‘์ธก???‰๊????˜์‹ ?ฉํ•  ???†๋Š”???ผ๊ตด???€?ด์„œ๋ง???์ฐจ์ด๋ฅ?๋ณด์ด??๊ฒƒ์œผ๋ก??˜ํ??ฌ๋‹ค. ?€๋ถ€๋ถ„์˜ ?˜์ด ??์ธต์? ?Š์? ์ธต์— ๋น„ํ•ด ?ด๋Ÿฐ ?ผ๊ตด???”์šฑ ๋ฏฟ์Œ์งํ•˜๋ฉ??ค๊?๊ฐˆ๋งŒ?˜๋‹ค๊ณ??๋‹จ?ˆ๋‹ค. ?ฐ๊ตฌ?€?€ ?œ์‹ ?ฉํ•  ???†๋Š” ?ผ๊ตด?๋Š” ?ฝ๊ฒŒ ?Œ์•„์ฐจ๋ฆด๋งŒํ•œ ?จ์„œ๊ฐ€ ?˜ํ????ˆ๋Š” ?ฐ๋„ ?˜์ด ??์ธต์? ?ด๋? ๊ฐ„๊ณผ?ˆ๋‹ค?๊ณ  ?ค๋ช…?ˆ๋‹ค.

??๋ฒ?์ง??คํ—˜?์„  ?ผ๊ตด ?ฌ์ง„??๋ณด๋Š” ?ฌ๋žŒ?ค์˜ ?Œ๋? ๊ธฐ๋Šฅ?ฑMRI๋ก?์ดฌ์˜?ˆ๋‹ค. ์ฐธ๊??๋Š” 55~80?ธ์˜ ?ฑ์ธ 23๋ช??‰๊ท  66??๊ณ??Š์???21๋ช??‰๊ท  33???ด์—ˆ?? ๋ถ„์„ ๊ฒฐ๊ณผ ?Š์? ์ธต์? ??๊ณผ์ •?์„œ ?„์ธก?Œ์„ฌ??๋ถ€?„๊? ?œ์„ฑ?”๋˜??๊ฒƒ์œผ๋ก??˜ํ??ฌ๋‹ค. ?˜์‹ ?ฉํ•  ???†๋Š”???ผ๊ตด??๋ณ????นํžˆ ๊ทธ๋žฌ?? ?˜์?๋ง??˜์ด ??์ธต์? ?ด๋‹น ๋ถ€?„์˜ ?œ๋™??๋ฏธ๋??ˆ๋‹ค.

?ฐ๊ตฌ?€?€ ?œ์ Š?€ ์ธต์˜ ?Œ๋Š” ?˜์กฐ?ฌํ•˜?? ?ฌ๊ธฐ??๋ญ”๊? ?˜๋ชป??๊ฒƒ์ด ?ˆ๋‹ค?™๋Š” ๊ฒฝ๊ณ  ? ํ˜ธ๋ฅ?๋ณด๋‚ด??๋ฐ˜๋ฉด ?˜์ด ??์ธต์˜ ?Œ๋Š” ๊ทธ๋Ÿฌ์ง€ ๋ชปํ•˜??๊ฒƒ์œผ๋ก??˜ํ??ฌ๋‹ค?๊ณ  ?ค๋ช…?ˆ๋‹ค. ??๊ฐ™์? ??๊ธฐ๋Šฅ???€?˜์—???จ๋? ์ฐจ์ด๊ฐ€ ?†๋Š” ๊ฒƒ์œผ๋ก??˜ํ??ฌ๋‹ค.

๊ฑด๊ฐ•?ฌ๋ฆฌ??๋ถ„์•ผ??์ฐฝ์‹œ?์ธ ?ฐ๊ตฌ?€???ธ๋ฆฌ ?Œ์ผ??๊ต์ˆ˜???œ์‚ฌ?Œ์˜ ?ฌ์ •???๋‹จ?ฅ๋ ฅ?€ 50?€ ์ดˆ์ค‘๋ฐ˜๋???? ํ‡ด?˜๋Š” ๊ฒƒ์œผ๋ก?๋ณด์ธ?คโ€๋ฉด???œ์‚ฌ๊ธฐ์— ๊ฑธ๋ ค?œ๋Š” ?„ํ˜•???ฌ์ƒ?๋Š” ?ฌ์ž๊ฒฝํ—˜???๋???55?ธ์˜ ?จ์„ฑ?์ด?ผ๊ณ  ๋งํ–ˆ??

๊ทธ๋????œ์ด?ค์? ?ˆ์ด ?ˆ์œผ๋ฉ??ธํ•œ ๋งˆ์Œ?ผ๋กœ ?ฌ์ž?????ˆ๋Š” ?ฌ๋žŒ?คโ€์ด?ผ๋ฉฐ ?œ๊ทธ?ฐ๋ฐ???Œ์—???˜์˜ค??์ดˆ๊ธฐ ? ํ˜ธ ์ฆ??˜๊ทธ ?ํ™”???ฌ์ž?˜์? ๋ง๋ผ???˜์? ๋ถ€?™์‚ฐ???ฌ์? ๋ง๋ผ?™๋Š” ๊ฒฝ๊ณ ๋ฅ??ฃ์? ๋ชปํ•˜??๊ฒฝํ–ฅ???ˆ๋‹ค?๊ณ  ๋งํ–ˆ??

?˜์ด ???ฌ๋žŒ???€??๊ทธ๋???์ถฉ๊ณ ??๋ช…ํ™•?˜๋‹ค. ?œํˆฌ?๋? ๊ถŒ์œ ?˜๋Š” ?ธ์ผ์ฆˆ๋งจ๊ณ??์ข…?˜์? ๋ง๋ผ. ๊ฒฐ๋‹จ์ฝ??˜๋…ธ?™๋ผ๊ณ?๋งํ•˜?? ๊ณต์งœ ?์‹ฌ??์ฃผ๋Š” ?ฌ์ž?ค๋ช…?Œ์— ๊ฐ€์ง€ ๋ง๋ผ. ?ด๋Ÿฐ ?ฌ๋žŒ?ค์„ ๋ฉ€๋ฆ??˜๋ผ. ?น์‹ ???ˆ์„ ๊ทนํžˆ ์กฐ์‹ฌ?ด์„œ ?ค๋ฃจ?? ???์‹ ???ฌ์ž๋ฅ?๊ถŒ์œ ?˜๋Š” ?„ํ™”??๋ฐ”๋กœ ?Š์–ด๋ฒ„๋ฆฐ?คโ€?

๊ทธ๋Ÿฐ??? ๋ขฐ?????†๋Š” ?ผ๊ตด?€ ?ด๋–ค ๋ชจ์Šต?ผ๊นŒ? ?ฐ๊ตฌ?€?€ ?ด๋ฒˆ ?ฐ๊ตฌ???ฌ์šฉ???ผ๊ตด?ฌ์ง„???˜์—ฐ๊ต?์กฐ๊ฑด???œ์•ฝ ?Œ๋ฌธ?โ€??ธ๋ก ??๊ณต๊ฐœ?˜์? ?Š์•˜?? ?Œ์ผ??๊ต์ˆ˜??๊ฐœ๊ด„?์ธ ?น์ง•??๋งํ•œ?? ?œ์›ƒ?Œ์ด ์ง„์‹ค?˜์? ๋ชปํ•˜๊ณ??ˆ์„ ๋งˆ์ฃผ์น˜๋Š” ๊ฒƒ์„ ?ผํ•œ?? ?œ์ • ?„์ฒด๋ฅ?์ข…ํ•ฉ?์œผ๋ก??๋‹จ?ด์•ผ ?œ๋‹ค.??

๊ธฐ์กด ?ฐ๊ตฌ???ฐ๋ฅด๋ฉ?์ง„์งœ ?ƒ์Œ???น์ง•?€ ?ˆ์ด ๋น›๋‚˜๋ฉ?๊ฐ€?˜์–ด์ง€๊ณ?๋บจ์˜ ๊ทผ์œก???ฌ๋ผ๊ฐ„๋‹ค???์ด?? ??๊ฐ™์? ๋ฏธ์†Œ??๋ช…๋ช…?์˜ ?ด๋ฆ„?????˜๋’ค???ƒ์Œ?™์ด??๋ถˆ๋ฆฐ?? ?ด์— ๋น„ํ•ด ?์…ˆ??๊ฐ์ถ”??๊ฐ€์ง??ƒ์Œ?€ ?…๋งŒ ?ƒ๋Š” ๊ฒƒ์ด ?น์ง•?ด๋‹ค.