Why does hitting your funny bone feel so horrible? - Cella Wright

691,944 views ใƒป 2024-07-23

TED-Ed


์•„๋ž˜ ์˜๋ฌธ์ž๋ง‰์„ ๋”๋ธ”ํด๋ฆญํ•˜์‹œ๋ฉด ์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค.

๋ฒˆ์—ญ: Jinsol Song ๊ฒ€ํ† : DK Kim
00:07
Whatever you were doing, there was no way to anticipate what came next.
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๋ฌด์Šจ ์ผ์„ ํ•˜๋“  ๊ฐ„์— ๋‹ค์Œ์— ๋ฌด์Šจ ์ผ์ด ์ƒ๊ธธ์ง€๋Š” ์•Œ ์ˆ˜ ์—†์ฃ .
00:12
The back of your elbow smacked against a hard surface
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ํŒ”๊ฟˆ์น˜ ๋’ค์ชฝ์ด ๋”ฑ๋”ฑํ•œ ํ‘œ๋ฉด์— ๋ถ€๋”ชํ˜”์„ ๋•Œ
00:15
and the impact sent a sensation so distinctly disquieting
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์ฐŒ๋ฆฟํ•˜๊ณ  ๋ถˆํŽธํ•œ ์ถฉ๊ฒฉ์ด ํŒ”์„ ํ†ตํ•ด ๋‚ด๋ ค๊ฐ€
00:19
shooting down your arm that it took several moments to regain composure.
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๊ทธ ์ถฉ๊ฒฉ์—์„œ ์ •์‹ ์ฐจ๋ฆฌ๋ ค๋ฉด ํ•œ์ฐธ ๊ฑธ๋ ธ๋˜ ์ ์ด ์žˆ์ฃ .
00:24
So, why does hitting this spot on your elbowโ€”
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๊ทธ๋ ‡๋‹ค๋ฉด ํŒ”๊ฟˆ์น˜์˜ ์ด ๋ถ€๋ถ„์„ ๋ถ€๋”ชํžˆ๋ฉด,
00:28
often referred to as your funny boneโ€” feel so weird?
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ํ”ํžˆ ์ฒ™๊ณจ๋‹จ์ด๋ผ ํ•˜๋Š” ๋ถ€๋ถ„์„ ๋ถ€๋”ชํžˆ๋ฉด ์™œ ์ด๋ ‡๊ฒŒ ๋А๋‚Œ์ด ์ด์ƒํ•œ ๊ฑธ๊นŒ์š”?
00:32
Well, to start, your elbow is one of the most complicated joints in your body.
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์šฐ์„ , ํŒ”๊ฟˆ์น˜๋Š” ์‹ ์ฒด์—์„œ ์•„์ฃผ ๋ณต์žกํ•œ ๊ด€์ ˆ ์ค‘ ํ•˜๋‚˜์ž…๋‹ˆ๋‹ค.
00:38
It's where your upper arm bone, the humerus,
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์ด๊ณณ์€ ํŒ”๋š ์œ„์ชฝ ๋ผˆ์ธ ์ƒ์™„๊ณจ์ด
00:41
meets the two bones of your forearm.
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ํŒ”๋š์˜ ๋‘ ๋ผˆ์™€ ๋งŒ๋‚˜๋Š” ์ง€์ ์ž…๋‹ˆ๋‹ค.
00:43
Three main nerves run through your elbow.
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์ฃผ์š” ์‹ ๊ฒฝ ์„ธ ๊ฐœ๊ฐ€ ์—ฌ๊ธฐ๋ฅผ ์ง€๋‚˜ ํŒ”๊ฟˆ์น˜์— ์ด์–ด์ง€๊ณ  ์žˆ์ฃ .
00:45
One of them, the ulnar nerve, is particularly relevant for our purposes.
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ํŠนํžˆ๋‚˜ ๊ทธ์ค‘ ํ•˜๋‚˜์ธ ์ฒ™๊ณจ ์‹ ๊ฒฝ์ด ์ด ํ˜„์ƒ๊ณผ ๊ด€๋ จ์ด ์žˆ์Šต๋‹ˆ๋‹ค.
00:50
Your ulnar nerve is composed of both sensory and motor nerve fibers.
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์ฒ™๊ณจ ์‹ ๊ฒฝ์€ ๊ฐ๊ฐ ์‹ ๊ฒฝ ์„ฌ์œ ์™€ ์šด๋™ ์‹ ๊ฒฝ ์„ฌ์œ ๋กœ ๊ตฌ์„ฑ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.
00:55
It extends from your spine to the tips of your fourth and fifth fingers,
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์ฒ™์ถ”์—์„œ ๋‚˜์™€ ๋„ค ๋ฒˆ์งธ์™€ ๋‹ค์„ฏ ๋ฒˆ์งธ ์†๊ฐ€๋ฝ ๋๊นŒ์ง€ ์ด์–ด์ ธ
01:00
providing them with sensation along with swaths of your forearm and hand.
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ํŒ”๋š๊ณผ ์†์˜ ๊ฐ๊ฐ, ๊ทธ๋ฆฌ๊ณ  ์›€์ง์ž„์„ ๋А๋ผ๊ฒŒ ํ•˜์ฃ .
01:05
So, say your little finger gets crushed by a car door.
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์ƒˆ๋ผ ์†๊ฐ€๋ฝ์ด ์ž๋™์ฐจ ๋ฌธ์— ๋ผ์—ˆ๋‹ค๊ณ  ๊ฐ€์ •ํ•ด๋ด…์‹œ๋‹ค.
01:09
Sensory receptors in your pinky finger's tissues
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์ƒˆ๋ผ ์†๊ฐ€๋ฝ ์กฐ์ง์— ์žˆ๋Š” ๊ฐ๊ฐ ์ˆ˜์šฉ์ฒด๊ฐ€
01:12
register that unfortunate information
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์ด ๊ณ ํ†ต์Šค๋Ÿฌ์šด ์ •๋ณด๋ฅผ ์ธ์ง€ํ•ด์„œ
01:15
and send electrical impulses up the ulnar nerve,
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์ฒ™๊ณจ ์‹ ๊ฒฝ์œผ๋กœ ์ „๊ธฐ ์ž๊ทน์„ ๋ณด๋‚ด๊ณ 
01:18
which are then processed in your central nervous system.
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์ด ์ž๊ทน์€ ์ค‘์ถ” ์‹ ๊ฒฝ๊ณ„์—์„œ ์ฒ˜๋ฆฌ๋ฉ๋‹ˆ๋‹ค.
01:22
This leads to the perception of acute, sharp pain,
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๊ทธ๋ž˜์„œ ๊ทน์‹ฌํ•˜๊ณ  ๋‚ ์นด๋กœ์šด ํ†ต์ฆ์„ ๋จผ์ € ๋А๋‚€ ๋‹ค์Œ์—
01:25
followed by aching.
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์•„ํ””์„ ๋А๋ผ๊ฒŒ ๋˜๋Š” ๊ฒƒ์ด์ฃ .
01:27
So that's how your ulnar nerve generally works.
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์ฒ™๊ณจ ์‹ ๊ฒฝ์€ ์ผ๋ฐ˜์ ์œผ๋กœ ์ด๋ ‡๊ฒŒ ์ž‘์šฉํ•ฉ๋‹ˆ๋‹ค.
01:30
But your elbow has an anatomical quirk that leaves your ulnar nerve vulnerable
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ํ•˜์ง€๋งŒ ํŒ”๊ฟˆ์น˜์— ์žˆ๋Š” ํ•ด๋ถ€ํ•™์  ํŠน์„ฑ์œผ๋กœ ์ธํ•ด
์ฒ™๊ณจ ์‹ ๊ฒฝ์€ ๋‹ค๋ฅธ ๋ฐฉ์‹์œผ๋กœ ํ™œ์„ฑํ™”๋˜๊ธฐ๊ฐ€ ์‰ฝ์Šต๋‹ˆ๋‹ค.
01:34
to getting activated in a different way.
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01:37
Along almost all of its length, your ulnar nerve is protected,
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์ฒ™๊ณจ ์‹ ๊ฒฝ์€ ๊ฑฐ์˜ ๋ชจ๋“  ๊ตฌ๊ฐ„์—์„œ
๊ทผ์œก, ์ง€๋ฐฉ, ๋ผˆ ์•„๋ž˜์— ์ˆจ์–ด์„œ ๋ณดํ˜ธ๋ฐ›์Šต๋‹ˆ๋‹ค.
01:42
hidden beneath muscle, fat, and bone.
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01:45
Thankfully, this is generally true of your nerves.
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๋‹คํ–‰ํžˆ๋„ ์‹ ๊ฒฝ๋“ค์€ ๋Œ€๊ฐœ ๊ทธ๋ ‡์ฃ .
01:47
But when your ulnar nerve reaches your elbow,
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๊ทธ๋Ÿฐ๋ฐ ์ฒ™๊ณจ ์‹ ๊ฒฝ์ด ํŒ”๊ฟˆ์น˜๋ฅผ ์ง€๋‚  ๋•Œ๋Š”
01:50
it runs beneath the bony bump at the bottom of your humerus,
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๋‚ด์ธก ์ƒ๊ณผ๋ผ๊ณ  ๋ถ€๋ฅด๋Š”
์ƒ์™„๊ณจ ์•„๋ž˜์ชฝ์˜ ๋ผˆ ๋Œ๊ธฐ๋ฅผ ์ง€๋‚˜๊ณ ,
01:54
named the medial epicondyle,
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01:56
and it passes through a tunnel of ligament and muscle tissue
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ํŒ”๊ฟˆ์น˜ ํ„ฐ๋„์ด๋ผ๊ณ  ํ•˜๋Š” ์ธ๋Œ€์™€ ๊ทผ์œก์œผ๋กœ ๋œ ํ„ฐ๋„์„ ์ง€๋‚ฉ๋‹ˆ๋‹ค.
01:59
called the cubital tunnel.
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02:01
When you bend your elbow,
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ํŒ”๊ฟˆ์น˜๋ฅผ ๊ตฌ๋ถ€๋ฆฌ๋ฉด ์ฒ™๊ณจ ์‹ ๊ฒฝ์ด ๋‚ด์ธก ์ƒ๊ณผ์— ๋‹ฟ์•„ ๋‚ฉ์ž‘ํ•ด์ง€๋Š”๋ฐ
02:02
your ulnar nerve gets flattened against the medial epicondyle
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02:06
and the protective tissue in the area gets displaced,
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์ด๋•Œ ํ•ด๋‹น ๋ถ€์œ„์˜ ๋ณดํ˜ธ ์กฐ์ง์ด ๋ฐ€๋ ค๋‚˜๋ฉด์„œ
02:09
bringing the nerve especially close to the skin's surface.
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์‹ ๊ฒฝ์ด ํ”ผ๋ถ€ ํ‘œ๋ฉด์— ๋งค์šฐ ๊ฐ€๊นŒ์›Œ์ง€๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.
02:13
In this position, the ulnar nerve is covered only by skin
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์ด๋Ÿฐ ์ž์„ธ์—์„œ๋Š” ์ฒ™๊ณจ ์‹ ๊ฒฝ์„ ๋ณดํ˜ธํ•˜๊ณ  ์žˆ๋Š” ๊ฒŒ
ํ”ผ๋ถ€์™€ ์–‘์ธก ํ„ฐ๋„ ์ธ๋Œ€ ์กฐ์ง๋ฟ์ด๋ผ
02:17
and cubital tunnel ligament tissue,
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02:19
making it perhaps the longest area of semi-exposed nerve in your body.
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์‹ ์ฒด์—์„œ ๊ฐ€์žฅ ๊ธธ๊ฒŒ ๋ฐ˜๋…ธ์ถœ ์ƒํƒœ์ธ ์‹ ๊ฒฝ ๋ถ€์œ„๊ฐ€ ๋˜๋Š” ๊ฑฐ์ฃ .
02:24
So, when the area is struck at the right angle with enough force,
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๋”ฐ๋ผ์„œ ์ •ํ™•ํ•œ ๊ฐ๋„์™€ ์ถฉ๋ถ„ํ•œ ํž˜์œผ๋กœ ๊ทธ ๋ถ€๋ถ„์„ ๋ถ€๋”ชํžˆ๊ฒŒ ๋˜๋ฉด
02:29
something interesting happens.
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์ฐŒ๋ฆฟํ•œ ๊ธฐ๋ถ„์„ ๋А๋ผ๊ฒŒ ๋˜๋Š” ๊ฑฐ์ฃ .
02:31
Instead of the sensation simply activating peripheral receptors
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์ž๊ทน์ด ๋‹จ์ˆœํžˆ ๋ง์ดˆ ์ˆ˜์šฉ์ฒด๋ฅผ ํ™œ์„ฑํ™”ํ•ด์„œ
02:35
that send electrical signals along your ulnar nerve,
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์ฒ™๊ณจ ์‹ ๊ฒฝ์„ ๋”ฐ๋ผ ์ „๊ธฐ ์‹ ํ˜ธ๋ฅผ ๋ณด๋‚ด๋Š” ๊ฒŒ ์•„๋‹ˆ๋ผ
02:39
the nerve's fibers are stimulated directly.
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์‹ ๊ฒฝ ์„ฌ์œ ๊ฐ€ ์ง์ ‘ ์ž๊ทน์„ ๋ฐ›์Šต๋‹ˆ๋‹ค.
02:42
This is why hitting your so-called funny bone hits different.
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๊ทธ๋ž˜์„œ ์ฒ™๊ณจ๋‹จ์„ ๋ถ€๋”ชํžˆ๋ฉด ์ฐŒ๋ฆฟํ•œ ๋А๋‚Œ์ด ๋“œ๋Š” ๊ฑฐ์ฃ .
02:47
The exact mechanisms aren't yet fully understood.
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์ •ํ™•ํ•œ ๋งค์ปค๋‹ˆ์ฆ˜์€ ์•„์ง ์™„์ „ํžˆ ์ดํ•ด๋˜์ง€ ์•Š์•˜์Šต๋‹ˆ๋‹ค.
02:50
But the impact alters the ulnar nerve's signaling,
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ํ•˜์ง€๋งŒ ์ถฉ๊ฒฉ์ด ์‹ ๊ฒฝ ์‹ ํ˜ธ์˜ ์ฆ์‹์„ ์œ ๋ฐœํ•˜์—ฌ
02:53
perhaps by causing a proliferation of nerve signals,
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์ฒ™๊ณจ ์‹ ๊ฒฝ์˜ ์‹ ํ˜ธ ์ „๋‹ฌ์ด ๋ณ€ํ™”ํ•˜๋ฉด์„œ
02:56
leading to that intense pins-and-needles sensation
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๊ทธ ๊ฐ•๋ ฌํ•˜๊ณ  ์ฐŒ๋ฆฟํ•œ ๋А๋‚Œ์„ ์œ ๋ฐœํ•  ์ˆ˜๋„ ์žˆ๋Š” ๊ฑฐ์ฃ .
02:59
called transient paresthesia,
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์ด๊ฒƒ์€ ์ผ์‹œ์  ์ด์ƒ ๊ฐ๊ฐ์ด๋ผ ํ•˜๋Š”๋ฐ
03:01
which radiates down the length of your arm.
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์ด ๊ฐ๊ฐ์€ ํŒ” ์ „์ฒด๋กœ ํผ์ง‘๋‹ˆ๋‹ค.
03:04
In rare cases, whacks to this special spot
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๋“œ๋ฌธ ๊ฒฝ์šฐ์ด๊ธด ํ•˜์ง€๋งŒ, ์ด ํŠน๋ณ„ํ•œ ๋ถ€์œ„๋ฅผ ๋ถ€๋”ชํžˆ๋ฉด
03:07
have led to temporary loss of consciousness,
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์ผ์‹œ์ ์œผ๋กœ ์˜์‹์„ ์žƒ์„ ์ˆ˜๋„ ์žˆ๋Š”๋ฐ,
03:10
perhaps because a hard enough strike could disrupt nerve signaling
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์„ธ๊ฒŒ ๋ถ€๋”ชํžˆ๋ฉด ์‹ ๊ฒฝ ์‹ ํ˜ธ์™€ ํ˜ˆ์•ก ํ๋ฆ„์„ ๋ฐฉํ•ดํ•˜๊ธฐ ๋•Œ๋ฌธ์ผ ์ˆ˜๋„ ์žˆ์ฃ .
03:14
and blood flow.
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03:15
In addition to these more immediately distressing moments,
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์ด๋ ‡๊ฒŒ ์ˆœ๊ฐ„์ ์œผ๋กœ ์•„ํ”ˆ ๊ฒฝ์šฐ๋„ ์žˆ์ง€๋งŒ
03:19
regular bent-elbow activities are thought to put pressure
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์ง€์†์ ์œผ๋กœ ํŒ”๊ฟˆ์น˜๋ฅผ ๊ตฝํžˆ๋Š” ํ™œ๋™์€
์‹œ๊ฐ„์ด ์ง€๋‚ ์ˆ˜๋ก ์ฒ™๊ณจ ์‹ ๊ฒฝ์— ์••๋ ฅ์„ ๊ฐ€ํ•˜๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.
03:22
on the ulnar nerve over time.
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03:24
Ulnar nerve entrapment is a relatively common condition.
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์ฒ™๊ณจ ์‹ ๊ฒฝ ์••๋ฐ•์€ ๋น„๊ต์  ํ”ํ•œ ์งˆํ™˜์ž…๋‹ˆ๋‹ค.
03:28
It happens when the ulnar nerve becomes compressed and obstructed,
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์ด๋Š” ์ฒ™๊ณจ ์‹ ๊ฒฝ์ด ์••๋ฐ•๋˜๊ณ  ๋ง‰ํžˆ๋ฉด์„œ ๋ฐœ์ƒํ•˜๋ฉฐ,
03:32
most commonly with the cubital tunnel.
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ํŒ”๊ฟˆ์น˜ ํ„ฐ๋„์—์„œ ๊ฐ€์žฅ ํ”ํ•˜๊ฒŒ ๋ฐœ์ƒํ•ฉ๋‹ˆ๋‹ค.
03:34
The result of this chronic ulnar nerve pain can be persistent paresthesia,
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๋งŒ์„ฑ ์ฒ™๊ณจ ์‹ ๊ฒฝํ†ต์€ ์ง€์†์ ์ธ ๊ฐ๊ฐ ์ด์ƒ๋ฟ ์•„๋‹ˆ๋ผ
03:39
as well as weakness in the forearm and hand.
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ํŒ”๋š๊ณผ ์†์ด ์•ฝํ•ด์ง€๋Š” ๊ฒฐ๊ณผ๋ฅผ ๋‚ณ์„ ์ˆ˜๋„ ์žˆ์ฃ .
03:42
In the hopes of preventing such conditions,
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์ด๋Ÿฌํ•œ ์งˆ๋ณ‘์„ ์˜ˆ๋ฐฉํ•˜๊ธฐ ์œ„ํ•ด
03:44
doctors recommend conscientious elbow usage.
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์˜์‚ฌ๋“ค์€ ์˜์‹์ ์œผ๋กœ ํŒ”๊ฟˆ์น˜๋ฅผ ์‚ฌ์šฉํ•˜๊ธธ ๊ถŒ์žฅํ•˜์ฃ .
03:47
That includes stretching your arms and straightening your elbows,
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์ด์—๋Š” ํŒ”์„ ๋ป—๊ณ  ํŒ”๊ฟˆ์น˜๋ฅผ ๊ณง๊ฒŒ ํŽด๋Š” ๊ฒƒ,
03:51
and generally taking breaks that help provide regular relief
66
231185
3295
๊ทธ๋ฆฌ๊ณ  ์ „๋ฐ˜์ ์ธ ํœด์‹์„ ์ทจํ•ด์„œ
์ฒ™๊ณจ ์‹ ๊ฒฝ์— ๊ทœ์น™์ ์ธ ํœด์‹๊ณผ ์ตœ๋Œ€ํ•œ์˜ ํ˜ˆ๋ฅ˜๋ฅผ ๊ณต๊ธ‰ํ•˜๋Š” ๊ฒŒ ์žˆ์Šต๋‹ˆ๋‹ค.
03:54
and maximal blood flow to your ulnar nerve.
67
234480
2586
์ด ์›น์‚ฌ์ดํŠธ ์ •๋ณด

์ด ์‚ฌ์ดํŠธ๋Š” ์˜์–ด ํ•™์Šต์— ์œ ์šฉํ•œ YouTube ๋™์˜์ƒ์„ ์†Œ๊ฐœํ•ฉ๋‹ˆ๋‹ค. ์ „ ์„ธ๊ณ„ ์ตœ๊ณ ์˜ ์„ ์ƒ๋‹˜๋“ค์ด ๊ฐ€๋ฅด์น˜๋Š” ์˜์–ด ์ˆ˜์—…์„ ๋ณด๊ฒŒ ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๊ฐ ๋™์˜์ƒ ํŽ˜์ด์ง€์— ํ‘œ์‹œ๋˜๋Š” ์˜์–ด ์ž๋ง‰์„ ๋”๋ธ” ํด๋ฆญํ•˜๋ฉด ๊ทธ๊ณณ์—์„œ ๋™์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค. ๋น„๋””์˜ค ์žฌ์ƒ์— ๋งž์ถฐ ์ž๋ง‰์ด ์Šคํฌ๋กค๋ฉ๋‹ˆ๋‹ค. ์˜๊ฒฌ์ด๋‚˜ ์š”์ฒญ์ด ์žˆ๋Š” ๊ฒฝ์šฐ ์ด ๋ฌธ์˜ ์–‘์‹์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ฌธ์˜ํ•˜์‹ญ์‹œ์˜ค.

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