Catapulting Disc Brakes
#151
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It's also odd because there are 4 OTHER fingers/hand. If there were 5 other fingers, it would be even.
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#153
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It's not missing, really. I can show you where it is, if you don't believe me.
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#154
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Britannica does not agree.
It also doesn't say the thumb isn't often included with the other digits when talking about fingers.
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Interestingly, or maybe not interestingly at all, Grammarly has an opinion on this:
- A thumb is a digit, but not technically a finger.
- Many people don’t make the distinction between thumbs and other digits.
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https://www.ncbi.nlm.nih.gov/books/NBK279362/
Each finger has three individual bones, and the thumb only has two.
Interestingly, or maybe not interestingly at all, Grammarly has an opinion on this:
- A thumb is a digit, but not technically a finger.
- Many people don’t make the distinction between thumbs and other digits.
It seems they prefer the more "technical" different but realize that the other is used too.
In early development, they are much more equivalent.
Last edited by njkayaker; 10-01-20 at 04:31 PM.
#157
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(It wouldn't surprise me that funny stuff happens in development.)
https://www.ncbi.nlm.nih.gov/books/NBK279362/
https://www.ncbi.nlm.nih.gov/books/NBK279362/
Our earliest known ancestor is the fish Rhipidistia (2), which has been extinct for 230 million years. Its pectoral fin is the precursor of our hand, which has 4 fingers, each with 3 phalanges, and a thumb with only 2 phalanges.
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It happened long before that, apparently:
Our earliest known ancestor is the fish Rhipidistia (2), which has been extinct for 230 million years. Its pectoral fin is the precursor of our hand, which has 4 fingers, each with 3 phalanges, and a thumb with only 2 phalanges.
Certainly, the position of the growth center, or epiphysis, at the base of the metacarpal matches the position of the epiphysis of all the phalanges. By contrast, the growth center for all finger metacarpals is at their head, while none is present in the thumb metacarpal head.
Last edited by njkayaker; 10-01-20 at 04:43 PM.
#161
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It happened long before that, apparently:
Our earliest known ancestor is the fish Rhipidistia (2), which has been extinct for 230 million years. Its pectoral fin is the precursor of our hand, which has 4 fingers, each with 3 phalanges, and a thumb with only 2 phalanges.
Certainly, the position of the growth center, or epiphysis, at the base of the metacarpal matches the position of the epiphysis of all the phalanges. By contrast, the growth center for all finger metacarpals is at their head, while none is present in the thumb metacarpal head.
#163
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Or one could ride where one needn't keep a deathgrip on the bar. That works, too.
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#164
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So - is it still a finger?
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Why isn't the big toe a "fhumb"? (The big toe has the same 2 phalanges deal.)
https://teachmeanatomy.info/lower-li...and-phalanges/
https://teachmeanatomy.info/lower-li...and-phalanges/
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For which one may not require more than thumb and two fingers, depending on the surface and how feeble your ring and little fingers are.
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Why isn't the big toe a "fhumb"? (The big toe has the same 2 phalanges deal.)
https://teachmeanatomy.info/lower-li...and-phalanges/
https://teachmeanatomy.info/lower-li...and-phalanges/
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#168
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Why isn't the big toe a "fhumb"? (The big toe has the same 2 phalanges deal.)
https://teachmeanatomy.info/lower-li...and-phalanges/
https://teachmeanatomy.info/lower-li...and-phalanges/
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Just the facts. Apparently the truth troubles you.
Hey Senor Pedant, if you need to hide behind the ignore list because my posts make you uncomfortable, I hope that you can find someone to help you figure out how to use it. I bet you'll feel much better about yourself. Best of luck!
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It happened long before that, apparently:
Our earliest known ancestor is the fish Rhipidistia (2), which has been extinct for 230 million years. Its pectoral fin is the precursor of our hand, which has 4 fingers, each with 3 phalanges, and a thumb with only 2 phalanges.
"A woman needs a man like a 230 million year-old fish needs a bicycle."
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#171
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But at least it could grip the bar.
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#175
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Whenever you ride any bike always brake with both hands all the time every time. You will have no problems. This is just common sense. To use only one brake accomplishes nothing. The one brake idea came from misguided Harley Davidson riders who like to do everything differently.