تدريب Shadowing: What is Narcolepsy? - تعلم التحدث بالإنجليزية عبر الفيديو

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And how to kind of try to describe it to them.

I found over time it's really difficult for people to understand it.

It's just very complicated with this tiredness, the cataplexy, the fragmented sleep at night.

If you're a normal person, you've got sleep and you've got your waking life.

And occasionally they'll overlap a little bit.

For me, I live in this world that is very rarely am I fully awake and very rarely am I fully asleep.

I live in the in-between.

I'm Tom Scanlon.

I'm a professor of neurology at Harvard Medical School.

Narcolepsy is a neurologic disorder.

It is one of the most common sleep disorders.

It affects about one in two thousand people.

It doesn't matter how much sleep they get at night, they're going to feel sleepy every day.

People also can have a variety of other symptoms.

These include hypnagogic hallucinations, where they can have very vivid dreamlike hallucinations just as they're drifting off to sleep

or just when they awaken.

They can have something called sleep paralysis, where as they're falling asleep or sometimes when they wake up, they can't move.

And then there's cataplexy, which is similar to sleep paralysis.

The distinction is that cataplexy occurs right in the middle of the day, and it's triggered by strong emotions.

And then the last thing, which is perhaps sort of one of the strangest of all,

is that, considering that somebody with narcolepsy is often very sleepy through the day, they often have fragmented sleep at night.

They can wake up four or five times for 10 or 20 minutes for no clear reason.

And so in the same way that they have trouble maintaining wakefulness through the day, they they can have trouble maintaining sleep through the night.

Somewhere between age 10 and age 20 or so is when narcolepsy begins.

People usually start off with sleepiness and then the other symptoms follow.

So there's a number of different systems in the brain that are involved in promoting arousal or wakefulness and sleep.

Up here is the cortex.

This is the front near the forehead.

Here's the back.

This is the brainstem coming down here.

And this is the cerebellum, which is involved in balance.

The brainstem is the site that most of these arousal promoting signals come from.

And those cells send connections up throughout the whole front part of the brain,

and they help turn on the cortex and other parts of the brain when you're awake.

There's also some cells in a small region called the hypothalamus

that are involved in promoting sleep

and these sleep promoting cells one of the things they do is they actually turn off the wake promoting cells

and so that allows you to be fully asleep without any hint of consciousness.

This is called the mammillary body and just above it right here is where the hypocretin neurons sit.

And this is a really critical collection of neurons,

brain cells, that makes very particular and special neurotransmitters known as hypocretin or orexin.

Those are just two names for the same thing.

The hypocretin producing cells help activate and sustain activity in the other weight promoting brain regions across the day.

The brain contains billions of neurons and And only a very, very small number of these produce hypocretin.

It's probably somewhere between 100,000 and 200,000, which sounds like a large number, but when you compare it to 10 billion neurons, it's really very small.

In narcolepsy, those hypocretin-producing cells die off.

When you look closely at the brain of somebody who has narcolepsy, what you see is about a 90 to 95% loss of the hypocretin-producing neurons.

So there's two broad themes that are being pursued in narcolepsy research right now.

One theme is to understand what goes wrong in the brain when the hypocretin-producing cells die off.

How does that lead to sleepiness and cataplexing and other symptoms?

Another big theme is trying to understand what actually kills the hypocretin neurons in the first place.

Because if we could understand that, then it's possible that if one could diagnose and recognize narcolepsy right at the earliest stages,

we might be able to get in and stop that process.

As we've discovered more and more about what's actually causing the hypocretin neurons to die off,

and as we've discovered more about the consequences of that for the brain,

it's really given us a lot of hope for new opportunities for coming up with better therapies for people with narcolepsy.

If we could get hypocretin back in the brain somehow, that would be potentially as great is giving insulin to people with diabetes.

It would really be the missing factor coming back into play.

And it could, in theory, cure their sleepiness and cure their cataplexy in the most thorough fashion.

Right now, scientists are working with a variety of techniques to try to get hypocretin signaling back into the brain.

But the hope is that in 5, 10, or 15 years, we may see those hypocretin replacement therapies coming into clinical practice.

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المفردات وملاحظات التحدث لهذا الدرس

هذا الدرس في المحادثة مبني على الفيديو “What is Narcolepsy?”. أكثر الكلمات تكرارًا في الفيديو: hypocretin, sleep, brain, narcolepsy, cells. يحتوي هذا الفيديو على 61 جملة و843 كلمة للتدرب على الترديد. مدة الكلام 4:59. يتكلم المتحدث بسرعة طبيعية، نحو 169 كلمة في الدقيقة، قريبة من المحادثة اليومية. 83% من الكلمات ضمن أكثر 3,000 كلمة شيوعًا في الإنجليزية، ويُستحسن مراجعة الباقي قبل البدء.

أهم المفردات في هذا الفيديو

15 كلمة من الفيديو تستحق التعلّم، مع النطق والمعنى:

الكلمة	النطق	المعنى
asleep صفة	/əˈsliːp/	نَائِم
symptom اسم	/ˈsɪm(p)təm/	عَرَض, عَلَامَة
rarely ظرف	/ˈɹɛəɹli/	قَلِيلًا, قَلِيلًا مَا
discover فعل	/dɪˈskʌvə/	اِكْتَشَفَ
cure فعل	/kjɔː/	شَفَى
disorder اسم	/dɪsˈɔɹdɚ/	اِخْتِلال, اِضْطِراب
awake فعل	/əˈweɪk/	صَحَى, اِسْتَيَقَظَ
sleepy صفة	/ˈsliːpi/	نَعْسَان, نَاعِس
fragment اسم	/ˈfɹæɡmənt/	قِطْعَة, شَقَفَة
complicated صفة	/ˈkɑm.plɪˌkeɪ.tɪd/	مُعَقَّد, مُرَكَّب
occur فعل	/əˈkɜː/	حَدَثَ, وَقَعَ
technique اسم	/tɛkˈniːk/	أُسْلُوب, تِقْنِيَة
compare فعل	/kəmˈpɛɚ/	قَارَنَ
occasionally ظرف	/əˈkeɪʒənəli/	أَحْيَانًا
pursue فعل	/pɚˈsu/	لَاحَقَ

الأفعال المركبة التي ستسمعها

الكلمة	النطق	المعنى
wake up فعل	/ˌweɪk ˈʌp/	صَحَا, اِسْتَيْقَظَ
come up with فعل		جَاءَ بِـ, أَتَى بِـ

القواعد في هذا الفيديو

أكثر التراكيب التي يستخدمها المتحدث، مع العبارات نفسها من الفيديو:

التركيب	في الفيديو
المبني للمجهول be + اسم المفعول — التركيز على ما يحدث لا على من يفعله	are involved · is involved · is called
جمل الوصل who / which + جملة — معلومة إضافية عن شخص أو شيء	cataplexy, which is · thing, which is · cerebellum, which is
المضارع التام have/has + اسم المفعول — حدث ماضٍ ما زال له أثر الآن	have fragmented · we've discovered

نطق يحتاج إلى انتباه

يستخدم المتحدث 14 من الصيغ المختصرة، مثل they're, I'm, we've. انطقها بصيغتها القصيرة كما تسمعها.

أصوات “sh” و“zh”: occasionally /əˈkeɪʒənəli/, potentially /pəˈtɛnʃ(ə)li/, emotion /ɪˈməʊ.ʃən/, consciousness /ˈkɑnʃəsnəs/, distinction /dɪˈstɪŋkʃən/
الكلمات الطويلة — انتبه لموضع النبر: complicated /ˈkɑm.plɪˌkeɪ.tɪd/, occasionally /əˈkeɪʒənəli/, potentially /pəˈtɛnʃ(ə)li/, neurological /nɝəˈlɑd͡ʒɪkəl/, hypocretin /ˌhaɪ.poʊˈkɹiː.tən/

أصوات يجدها متحدثو العربية صعبة:

/p/ — ليس /b/: انطقه مع نفخة هواء: asleep /əˈsliːp/, symptom /ˈsɪm(p)təm/, sleepy /ˈsliːpi/, complicated /ˈkɑm.plɪˌkeɪ.tɪd/, compare /kəmˈpɛɚ/
/v/ — ليس /f/: مع اهتزاز الأوتار الصوتية: discover /dɪˈskʌvə/, activate /ˈæktɪˌveɪt/, vivid /ˈvɪvɪd/, overlap /ˌəʊvəˈlæp/
تتابع الصوامت — لا تضف حركة بينها: symptom /ˈsɪm(p)təm/, cure /kjɔː/, sleepy /ˈsliːpi/, cortex /ˈkɔɹtɛks/, fragment /ˈfɹæɡmənt/

كيف تتدرب بهذا الفيديو

استمع إلى الفيديو كاملًا مرة واحدة دون أن تتكلم، ودوّن الكلمات التي لا تعرفها.
ابدأ بسرعة 0.75×، وردّد جملة جملة، ثم عُد إلى السرعة العادية عندما يصبح الأمر سهلًا.
سجّل صوتك وقارنه بالأصل، مع الانتباه إلى كلمات مثل asleep, symptom, rarely.

ما هي تقنية التظليل الصوتي؟

التظليل الصوتي (Shadowing) تقنية تعلم لغة مدعومة علمياً، طُورت أصلاً لتدريب المترجمين الفوريين المحترفين. الطريقة بسيطة لكنها قوية: تستمع لصوت إنجليزي أصلي وتكرره فوراً بصوت عالٍ — كظل يتبع المتحدث بتأخير 1-2 ثانية. تُظهر الأبحاث تحسناً كبيراً في دقة النطق والتنغيم والإيقاع وربط الأصوات والاستماع والطلاقة.

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تدريب Shadowing: What is Narcolepsy? - تعلم التحدث بالإنجليزية عبر الفيديو

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