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Itโ€™s Whatโ€™s On the Inside That Matters

So far, attempts to correlate sheer brain size with intelligence (whether by size or by ratio) have not been successful. Experiments have turned to other theories, and we have now stumbled across one that seems to fit pretty well: itโ€™s not about the brain size, itโ€™s about whatโ€™s inside.

The powercells of the brain are the neurons. So maybe itโ€™s as simple as counting the number of neurons, rather than looking at the overall size of the brain. Across all my research so far in trying to understand intelligence, Iโ€™ve come across many impressive researchers, but a psychologist named </svg>");">Suzana Herculano-Houzel stood out by far due to her unique techniques to linking brain composition and intelligence: </svg>");">making brain soup.



์ง€๊ธˆ๊นŒ์ง€, ์ˆœ์ „ํ•œ ๋‘๋‡Œ์˜ ํฌ๊ธฐ์™€ ์ง€๋Šฅ(ํฌ๊ธฐ ๋˜๋Š” ๋น„์œจ)์„ ์—ฐ๊ด€์‹œํ‚ค๋ ค๋Š” ์‹œ๋„๋Š” ์„ฑ๊ณตํ•˜์ง€ ๋ชปํ–ˆ๋‹ค. ์‹คํ—˜์€ ๋‹ค๋ฅธ ์ด๋ก ์œผ๋กœ ๋ฐ”๋€Œ์—ˆ๊ณ , ์šฐ๋ฆฌ๋Š” ์ด์ œ ์•„์ฃผ ์ž˜ ๋งž๋Š” ๊ฒƒ ๊ฐ™์€ ์ด๋ก  ํ•˜๋‚˜๋ฅผ ์šฐ์—ฐํžˆ ๋ฐœ๊ฒฌํ•˜๊ฒŒ ๋˜์—ˆ๋‹ค. ๊ทธ๊ฒƒ์€ ๋‡Œ์˜ ํฌ๊ธฐ์— ๊ด€ํ•œ ๊ฒƒ์ด ์•„๋‹ˆ๋ผ ๋‚ด๋ถ€์˜ ๊ฒƒ์— ๊ด€ํ•œ ๊ฒƒ์ด๋‹ค.

๋‡Œ์˜ ๋™๋ ฅ ์„ธํฌ๋Š” ๋‰ด๋Ÿฐ์ด๋‹ค. ๊ทธ๋ž˜์„œ ์•„๋งˆ๋„ ๋‡Œ์˜ ์ „์ฒด์ ์ธ ํฌ๊ธฐ๋ฅผ ๋ณด๋Š” ๊ฒƒ๋ณด๋‹ค ๋‰ด๋Ÿฐ์˜ ์ˆ˜๋ฅผ ์„ธ๋Š” ๊ฒƒ๋งŒํผ ๊ฐ„๋‹จํ•  ๊ฒ๋‹ˆ๋‹ค. ์ง€๊ธˆ๊นŒ์ง€ ์ง€๋Šฅ์„ ์ดํ•ดํ•˜๋ ค๊ณ  ๋…ธ๋ ฅํ•˜๋ฉด์„œ ๋งŽ์€ ์ธ์ƒ์ ์ธ ์—ฐ๊ตฌ์ž๋“ค์„ ๋งŒ๋‚ฌ์ง€๋งŒ, ์ˆ˜์ž”๋‚˜ ์—๋ฅดํ˜๋ผ๋…ธ-ํ›„์ ค์ด๋ผ๋Š” ์‹ฌ๋ฆฌํ•™์ž๋Š” ๋‡Œ ๊ตฌ์„ฑ๊ณผ ์ง€๋Šฅ์„ ์—ฐ๊ฒฐ์‹œํ‚ค๋Š” ๋…ํŠนํ•œ ๊ธฐ์ˆ ๋กœ ๋‹จ์—ฐ ๋‘๊ฐ์„ ๋‚˜ํƒ€๋ƒˆ๋‹ค.

์–‘ํŒŒ ์„ธํฌ์˜ ํ•ต์„ ์ฐŒ๋ฅด๋Š” ๊ฒƒ - ์ •ํ™•ํžˆ ๋‰ด๋Ÿฐ์€ ์•„๋‹ˆ์ง€๋งŒ, ํ•ต์˜ ๊ฐœ์ˆ˜์˜ ๋ฐœ๊ฒฌ์„ ๋” ์‰ฝ๊ฒŒ ํ•  ์ˆ˜ ์žˆ๋‹ค๋Š” ๊ฒƒ์„ ์•Œ ์ˆ˜ ์žˆ๋‹ค.
๋‰ด๋Ÿฐ ์นด์šดํŠธ ๋…ผ๋ฆฌ๋กœ ๋ณผ ๋•Œ, ์ธ๊ฐ„์ด ์ง„์ •์œผ๋กœ ์ง€์„ฑ์˜ ์ตœ๊ณ ๋ผ๋ฉด ๋ชจ๋“  ๋™๋ฌผ ์ค‘์—์„œ ๊ฐ€์žฅ ๋งŽ์€ ๋‰ด๋Ÿฐ์„ ๊ฐ€์ ธ์•ผ ํ•œ๋‹ค. ๋ถˆํ–‰ํžˆ๋„, ์ฝ”๋ผ๋ฆฌ ๋‡Œํƒ•์„ ๋งŒ๋“  ํ›„, Suzana๋Š” ์•„ํ”„๋ฆฌ์นด ์ฝ”๋ผ๋ฆฌ ๋‡Œ๊ฐ€ ์ธ๊ฐ„์˜ ๋‡Œ๋ณด๋‹ค 3๋ฐฐ ๋งŽ์€ ๋‰ด๋Ÿฐ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค๊ณ  ๊ณ„์‚ฐํ–ˆ๋‹ค. ๊ทธ ๊ณ„์‚ฐ์— ์˜ํ•˜๋ฉด ์ธ๊ฐ„์€ ๊ฒฝ์Ÿ์ž๋กœ ์ „๋ฝํ•œ๋‹ค.
๊ทธ๋Ÿฌ๋‚˜ ์ž์„ธํžˆ ์‚ดํŽด๋ณธ ํ›„, ๋‹ค๋ฅธ ๋” ์ค‘์š”ํ•œ ๊ฒฐ๊ณผ๋“ค์ด ๋‚˜ํƒ€๋‚˜๊ธฐ ์‹œ์ž‘ํ–ˆ๋‹ค: ๋ชจ๋“  ์‹ ๊ฒฝ์„ธํฌ ์ค‘ ์˜ค์ง 2%๋งŒ์ด ๋” ์ง„๋ณด๋œ ์‚ฌ๊ณ ๋ฅผ ๋‹ด๋‹นํ•˜๋Š” ๋Œ€๋‡Œํ”ผ์งˆ์— ์œ„์น˜ํ–ˆ๋‹ค. ์ด์— ๋น„ํ•ด ์ธ๊ฐ„์€ ๊ฐ™์€ ์œ„์น˜์— ์•ฝ 160์–ต ๊ฐœ์˜ ๋‰ด๋Ÿฐ์„ ๊ฐ€์ง€๊ณ  ์žˆ์—ˆ๋‹ค. ์•„ํ”„๋ฆฌ์นด ์ฝ”๋ผ๋ฆฌ๊ฐ€ ์ „์ฒด์ ์œผ๋กœ 3๋ฐฐ ๋” ๋งŽ์€ ๋‰ด๋Ÿฐ์„ ๊ฐ€์ง€๊ณ  ์žˆ๋Š” ๋ฐ˜๋ฉด, ์ธ๊ฐ„์€ ์ง€๋Šฅ์— ์ค‘์š”ํ•œ ๋‰ด๋Ÿฐ์„ ๊ฑฐ์˜ 3๋ฐฐ ๊ฐ€์ง€๊ณ  ์žˆ์—ˆ๋‹ค.
์ด์ œ ๋‡Œ์™€ ์ง€๋Šฅ์˜ ์ƒ๊ด€๊ด€๊ณ„๋Š” ๋‡Œ ์ž์ฒด์˜ ํฌ๊ธฐ๊ฐ€ ์•„๋‹ˆ๋ผ ๊ทธ ๋‚ด์šฉ์— ์ดˆ์ ์ด ๋งž์ถฐ์ ธ ์žˆ๋‹ค. ์ƒˆ๋กœ์šด ์—ฐ๊ตฌ๋Š” ํ”ผ์งˆ ๋‰ด๋Ÿฐ(๋Œ€๋‡Œํ”ผ์งˆ์˜ ์‹ ๊ฒฝ)์˜ ์ˆ˜์™€ ๋‚ด๋™๋งฅ ๊ฑฐ๋ฆฌ๋ฅผ ์‚ดํŽด๋ณด๋Š” ๊ฒƒ์ด๋‹ค. ๋˜ ๋‹ค๋ฅธ ์ดˆ์ ์œผ๋กœ๋Š”, ๋‰ด๋Ÿฐ ์‚ฌ์ด์˜ ๊ฑฐ๋ฆฌ.. ์ฆ‰, ์ปดํ“จํ„ฐ์™€ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ ๋‰ด๋Ÿฐ ์‚ฌ์ด์˜ ๋ฌผ๋ฆฌ์ ์ธ ๊ฑฐ๋ฆฌ๋„ ์ •๋ณด๊ฐ€ ํ•œ ์žฅ์†Œ์—์„œ ๋‹ค๋ฅธ ๊ณณ์œผ๋กœ ์–ผ๋งˆ๋‚˜ ๋นจ๋ฆฌ ๋ณด๋‚ด์งˆ ์ˆ˜ ์žˆ๋Š”๊ฐ€๋ฅผ ๊ฒฐ์ •ํ•œ๋‹ค๋Š” ๊ฒƒ์ด๋‹ค. ๊ฒฐ๊ตญ ์ •๋ณด๋Š” ๋งค์šฐ ๋น ๋ฅด๊ฒŒ ์ด๋™ํ•  ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ๋” ๋ฉ€๋ฆฌ ์ด๋™ํ•ด์•ผ ํ• ์ˆ˜๋ก ๋ชฉ์ ์ง€์— ๋„๋‹ฌํ•˜๋Š” ๋ฐ ๋” ์˜ค๋ž˜ ๊ฑธ๋ฆฐ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ์—ฌ๋Ÿฌ ์ข…์„ ์ œ์™ธํ•˜๊ณ , ๋” ๋˜‘๋˜‘ํ•œ ์ธ๊ฐ„์ด ๋” ํฐ ๋‰ด๋Ÿฐ์„ ๊ฐ€์ง€๊ณ  ์žˆ๊ณ  ๋˜ํ•œ ๋” ๋น ๋ฅธ ์ „๊ธฐ ์‹ ํ˜ธ๋ฅผ ๊ฐ€์ง€๊ณ  ์žˆ๋‹ค๋Š” ๊ฒƒ์„ ํ™•์ธํ•˜๊ธฐ ์œ„ํ•ด ์ธ๊ฐ„๋งŒ์˜ ์—ฐ๊ตฌ์— ์ ์šฉ๋˜์—ˆ๋‹ค.

์ง€๋Šฅ์—ฐ๊ตฌ ๋ถ„์•ผ๋Š” ๋งค์šฐ ๋น ๋ฅด๊ฒŒ ํ™•์žฅ๋˜๊ณ  ์žˆ์œผ๋ฉฐ, ๊ทธ ์‹œ๊ธฐ๊ฐ€ ํฅ๋ฏธ์ง„์ง„ํ•œ ์‹œ์ ์ด๋‹ค. AI์˜ ์ถœํ˜„๊ณผ ํ•จ๊ป˜, ์ง€๋Šฅ ์—ฐ๊ตฌ๋Š” ๊ทธ ๊ฒฐ๊ณผ๋“ค์ด ๋” ๋‚˜์€ ์‹ ๊ฒฝ๋ง๊ณผ ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ ๋งŒ๋“ค๊ธฐ ์œ„ํ•ด ์ ์šฉ๋  ์ˆ˜ ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ๊ทธ ์–ด๋А ๋•Œ๋ณด๋‹ค ์ค‘์š”ํ•ด์ง€๊ณ  ์žˆ๋‹ค. MIT์™€ ๊ฐ™์€ ์„ ๋„์ ์ธ ๊ธฐ๊ด€๋“ค์€ AI ๊ฐœ๋ฐœ ๋ฐ ์‹ ๊ฒฝ ์—ฐ๊ตฌ๋ฅผ SenseTime์ด๋‚˜ IBM๊ณผ ๊ฐ™์€ ํŒŒํŠธ๋„ˆ๋“ค๊ณผ ๊ฒฐํ•ฉํ•˜๊ณ  ์žˆ๋‹ค.
์ด ๋ถ€๋ถ„์—์„œ๋Š” ์ง€์„ฑ์ด ์–ด๋–ป๊ฒŒ ์ž‘์šฉํ•˜๋Š”์ง€(์ ์–ด๋„ ํ˜„์žฌ๋กœ์„œ ์–ด๋–ป๊ฒŒ ์ดํ•ดํ•˜๋Š”์ง€) ํƒ๊ตฌํ–ˆ๋‹ค. ๋‹ค์Œ ํŒŒํŠธ์—์„œ, ๋‚˜๋Š” ๊ทธ๊ฒƒ์ด ์–ด๋””์„œ ์™”๋Š”์ง€ ์ •ํ™•ํ•˜๊ฒŒ ํƒ๊ตฌํ•  ๊ฒƒ์ด๋‹ค. ์ง„ํ™”๊ฐ€ ์ธ๊ฐ„์˜ ์ง€๋Šฅ์„ ํ–ฅ์ƒ์‹œํ‚ค๋Š” ๋ฐ ๊ธฐ์—ฌํ–ˆ์ง€๋งŒ, ๊ทธ ๊ธฐ์› ์‚ฌ๊ฑด์€ ์—ฌ์ „ํžˆ ๊ฝค ํฅ๋ฏธ๋กœ์šด ๋ฏธ์Šคํ„ฐ๋ฆฌ๋‹ค.