Why do our thumbs have one less joint than our other fingers?

[her209]

 :light:
:Q

EDIT: Grammar!

 

[aircooled]

deep thought today huh? damn now I keep staring at my thumb....

 

[MartyMcFly3]

God made a mistake.

<--- sits back in lawnchair to watch the flamefest

 

[Howard]

What would you do with an extra joint?

 

[shimsham]

Originally posted by: Howard
What would you do with an extra joint?

apply flame?

 

[furie27]

There is a third joint, it's located right above the wrist. It's the joint that makes our thumbs opposable. Dr. explained it to me when I broke my hand in the 4th grade.

 

[spidey07]

Originally posted by: Howard
What would you do with an extra joint?

grab onto stuff like an oranutang.

 

[her209]

Originally posted by: Howard
What would you do with an extra joint?

Supergrip!

 

[Zanix]

it doesn't! what you talk about?!

 

[Zenmervolt]

Originally posted by: furie27
There is a third joint, it's located right above the wrist. It's the joint that makes our thumbs opposable. Dr. explained it to me when I broke my hand in the 4th grade.

Exactly. It's just that there's a large amount of, for lack of a better term, "webbing" between the thumb and the index finger.

ZV

 

[Stunt]

Because you touch yourself at night...

And you are wrong, it does have the same amount of joints.
the ball of your fingers are at your knuckle and you have two joints till the tip of the finger...
now check your thumd, the ball is at your wrist, still has motion (try by hold thumb stiff and straight, you can still move it)
then you again have two joints till the end, one right by the start of your hand, and one on the thumb.

So technically same number of joints...

 

[Yossarian]

"Why does our thumbs have one less joint than our other fingers?"

and that's edited for grammar eh? 😉

 

[b0mbrman]

Originally posted by: furie27
There is a third joint, it's located right above the wrist. It's the joint that makes our thumbs opposable. Dr. explained it to me when I broke my hand in the 4th grade.

Yup

 

[her209]

Originally posted by: Yossarian
"Why does our thumbs have one less joint than our other fingers?"

and that's edited for grammar eh? 😉

Hey now, I just got up!

 

[aplefka]

I can't believe you edited for grammar and still fvcked up.

 

[newParadigm]

it does have 3, one is just a ball and socket

 

[Fudssa]

Originally posted by: Zanix
it doesn't! what you talk about?!

 

It has 3.
How did you make it out of high school again? 😉

 

[Shawn]

It doesn't. WTF is wrong with you?

 

[her209]

Originally posted by: furie27
There is a third joint, it's located right above the wrist. It's the joint that makes our thumbs opposable. Dr. explained it to me when I broke my hand in the 4th grade.

http://education.yahoo.com/reference/gray/subjects/subject?id=56

 

[djheater]

Originally posted by: her209

Originally posted by: furie27
There is a third joint, it's located right above the wrist. It's the joint that makes our thumbs opposable. Dr. explained it to me when I broke my hand in the 4th grade.

http://education.yahoo.com/reference/gray/subjects/subject?id=56

In the four fingers the phalanges of the first row articulate with those of the second row and with the metacarpals; the phalanges of the second row with those of the first and third rows, and the ungual phalanges with those of the second row. In the thumb, which has only two phalanges, the first phalanx articulates by its proximal extremity with the metacarpal bone and by its distal with the ungual phalanx.

:thumbsup:

 

[furie27]

Originally posted by: her209

Originally posted by: furie27
There is a third joint, it's located right above the wrist. It's the joint that makes our thumbs opposable. Dr. explained it to me when I broke my hand in the 4th grade.

http://education.yahoo.com/reference/gray/subjects/subject?id=56

Going by that picture, the areas in blue are the joints, and it show a distinct 3rd joint in the thumb. It also shows that the thumb has fewer bones.