SIGforum.com    Main Page  Hop To Forum Categories  The Lounge    Well, now we know the physics behind knuckle-cracking - WSJ
Go
New
Find
Notify
Tools
Reply
  
Well, now we know the physics behind knuckle-cracking - WSJ Login/Join 
Don't Panic
Picture of joel9507
posted
I always wondered about what made the sound when knuckles were cracked, and now technology has gotten to where they have figured it out...
quote:
People pull their finger away from the rest of their hand until there’s a deep, muffled click. When medical imaging finally improved to the point where it could spy on the inside of a finger during the process, the true culprit was revealed: a bubble.

quote:
X-rays and MRI scans show that at the moment of cracking, a gas-filled cavity pops into existence

non-paywalled link - "How Knuckles Get Cracking" - WSJ

Within the article was this bit of good news to finger-crackers everywhere:
quote:
there has been a persistent myth that regular joint-cracking can cause arthritis. This has been debunked, both by systematic scientific studies and by allergist Donald L. Unger.
 
Posts: 15235 | Location: North Carolina | Registered: October 15, 2007Reply With QuoteReport This Post
Run Silent
Run Deep

Picture of Patriot
posted Hide Post
I always knew it was air…

Don’t know when I learned it, but this isn’t news.


_____________________________
Pledge allegiance or pack your bag!
The problem with Socialism is that eventually you run out of other people's money. - Margaret Thatcher
Spread my work ethic, not my wealth
 
Posts: 7100 | Location: South East, Pa | Registered: July 04, 2002Reply With QuoteReport This Post
Tinker Sailor Soldier Pie
Picture of Balzé Halzé
posted Hide Post
Well, it's news to me.

Cool info.


~Alan

Acta Non Verba
NRA Life Member (Patron)
God, Family, Guns, Country

Men will fight and die to protect women... because women protect everything else. ~Andrew Klavan

 
Posts: 31163 | Location: Elv. 7,000 feet, Utah | Registered: October 29, 2012Reply With QuoteReport This Post
Run Silent
Run Deep

Picture of Patriot
posted Hide Post
quote:
Originally posted by Balzé Halzé:
Well, it's news to me.

Cool info.


Well bully for you…


_____________________________
Pledge allegiance or pack your bag!
The problem with Socialism is that eventually you run out of other people's money. - Margaret Thatcher
Spread my work ethic, not my wealth
 
Posts: 7100 | Location: South East, Pa | Registered: July 04, 2002Reply With QuoteReport This Post
Run Silent
Run Deep

Picture of Patriot
posted Hide Post
https://en.wikipedia.org/wiki/Cracking_joints


_____________________________
Pledge allegiance or pack your bag!
The problem with Socialism is that eventually you run out of other people's money. - Margaret Thatcher
Spread my work ethic, not my wealth
 
Posts: 7100 | Location: South East, Pa | Registered: July 04, 2002Reply With QuoteReport This Post
Member
posted Hide Post
I am a joint cracking addict. Knuckles, wrist, knees, ankles, neck, scapula, etc. I can even crack my nose. (been broken 4x)

Drives my wife crazy. Razz
 
Posts: 4979 | Registered: April 20, 2010Reply With QuoteReport This Post
I Deal In Lead
Picture of Flash-LB
posted Hide Post
quote:
Originally posted by Patriot:
I always knew it was air…

Don’t know when I learned it, but this isn’t news.


Nope, I used to crack my knuckles back in the 60s and I read about why back then.

Must be a slow news day at the WSJ.
 
Posts: 10626 | Location: Gilbert Arizona | Registered: March 21, 2013Reply With QuoteReport This Post
His diet consists of black
coffee, and sarcasm.
Picture of egregore
posted Hide Post
I like to say no knowledge is ever useless, but this comes close.
 
Posts: 29050 | Location: Johnson City, TN | Registered: April 28, 2012Reply With QuoteReport This Post
Left-Handed,
NOT Left-Winged!
posted Hide Post
I crack my knuckles. And I have gas. Coincidence?
 
Posts: 5034 | Location: Indiana | Registered: December 28, 2004Reply With QuoteReport This Post
His diet consists of black
coffee, and sarcasm.
Picture of egregore
posted Hide Post
I have never felt the need to crack my knuckles, and probably couldn't if I tried. What triggers the impulse? Is the ability hereditary, like being able to roll your tongue into a U shape or cilantro tasting like soap?
 
Posts: 29050 | Location: Johnson City, TN | Registered: April 28, 2012Reply With QuoteReport This Post
Get my pies
outta the oven!

Picture of PASig
posted Hide Post
I thought this had been known for years that it was gas, it’s the same reason your back cracks at the chiropractor.


 
Posts: 35153 | Location: Pennsylvania | Registered: November 12, 2007Reply With QuoteReport This Post
Frangas non Flectes
Picture of P220 Smudge
posted Hide Post
In college, I was told it was this explanation given in the OP, but also the void either filling with nitrogen, or the sudden release or a nitrogen bubble.


______________________________________________
“There are plenty of good reasons for fighting, but no good reason ever to hate without reservation, to imagine that God Almighty Himself hates with you, too.”
 
Posts: 17881 | Location: Sonoran Desert | Registered: February 10, 2011Reply With QuoteReport This Post
His Royal Hiney
Picture of Rey HRH
posted Hide Post
I'm with Patriot, I remember this being explained several decades ago.

I haven't had the need to crack my knuckles in a long time but I still occasionally crack my neck.

What I do miss though is being able to crack my spine by twisting side to side and bending backwards. I can't do that any more.



"It did not really matter what we expected from life, but rather what life expected from us. We needed to stop asking about the meaning of life, and instead to think of ourselves as those who were being questioned by life – daily and hourly. Our answer must consist not in talk and meditation, but in right action and in right conduct. Life ultimately means taking the responsibility to find the right answer to its problems and to fulfill the tasks which it constantly sets for each individual." Viktor Frankl, Man's Search for Meaning, 1946.
 
Posts: 20257 | Location: The Free State of Arizona - Ditat Deus | Registered: March 24, 2011Reply With QuoteReport This Post
Member
posted Hide Post
I used to a lot when I was younger but when I read the OP, I tried it with no sucess Frown I guess 35 years makes a big difference!


_________________________________________________

"Once abolish the God, and the Government becomes the God." --- G.K. Chesterton
 
Posts: 3856 | Location: WNY | Registered: April 11, 2009Reply With QuoteReport This Post
  Powered by Social Strata  
 

SIGforum.com    Main Page  Hop To Forum Categories  The Lounge    Well, now we know the physics behind knuckle-cracking - WSJ

© SIGforum 2024