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B1 中級 英語 14:37 Educational

The most important lesson from 83,000 brain scans | Daniel Amen | TEDxOrangeCoast

TEDx Talks · 23,390,357 回視聴 · 追加日 3週間前

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00:00

Transcriber: Ilze Garda Reviewer: Denise RQ

00:07

In this talk, I'm going to give you the single most important lesson

00:13

my colleagues and I have learned from looking at 83,000 brain scans.

00:19

But first, let me put the lesson into context.

00:23

I am in the middle of seven children.

00:25

Growing up, my father called me a maverick

00:29

which to him was not a good thing.

00:32

(Laughter)

00:33

In 1972, the army called my number,

00:37

and I was trained as an infantry medic where my love of medicine was born.

00:43

But since I truly hated the idea of being shot at or sleeping in the mud,

00:50

I got myself retrained as an X-ray technician

00:53

and developed a passion for medical imaging.

00:57

As our professors used to say: "How do you know, unless you look?"

01:03

In 1979, when I was a second-year medical student,

01:07

someone in my family became seriously suicidal,

01:12

and I took her to see a wonderful psychiatrist.

01:15

Over time, I realized if he helped her, which he did,

01:20

it would not only save her life,

01:24

but it would also help her children and even her future grandchildren,

01:29

as they would be shaped by someone who is happier and more stable.

01:36

I fell in love with psychiatry

01:38

because I realized it had the potential to change generations of people.

01:47

In 1991, I went to my first lecture on brain SPECT imaging.

01:51

SPECT is a nuclear medicine study that looks at the blood flow and activity,

01:56

it looks at how your brain works.

02:00

SPECT was presented as a tool to help psychiatrists

02:04

get more information to help their patients.

02:09

In that one lecture, my two professional loves,

02:13

medical imaging and psychiatry,

02:15

came together, and quite honestly, revolutionized my life.

02:21

Over the next 22 years, my colleagues and I would build

02:24

the world's largest database of brain scans related to behavior

02:29

on patients from 93 countries.

02:33

SPECT basically tells us three things about the brain:

02:37

good activity, too little, or too much.

02:41

Here's a set of healthy SPECT scans.

02:43

The image on the left shows the outside surface of the brain,

02:48

and a healthy scan shows full, even, symmetrical activity.

02:53

The color is not important, it's the shape that matters.

02:58

In the image on the right, red equals the areas of high activity,

03:03

and in a healthy brain, they're typically in the back part of the brain.

03:10

Here's a healthy scan compared to someone who had two strokes.

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