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Im a Physical Therapy student at Penn State. About a year ago I learned about a few obscure muscles that not everyone has. One of them being the palmaris longus. Im the only one in the class that doesn't have them. You can check yourself by looking at your wrist, palm side and flexing your hand toward the ceiling. The thin band that pops out is the tendon to the muscle, some have a harder time than others in finding it. If you play around bending your wrist you'll eventually find it. Google image will help.
The palmaris longus helps you grip things, most of our knowledge of this muscle comes from rhesus monkeys. It's been nicknamed the tree climbing tendon.
Our book says this muscle is absent in about 15% of the population. I couldn't help but make a connection with 15% of the population has rh negative blood. I thought this would have been discussed somewhere but Google search i couldn't find anything. Sorry if a bit vague I'm at work. Any thoughts?
reply to post by Ellie Sagan
Im negative yes, when I saw my parents over the holidays neither of them had the tendon, I'm not sure of their blood type. But im googling now and seeing that Scandinavians have a higher rh neg population. Im icelandic on my dads side and norwegian on my moms, well if you trace the names back far enough, growing up I was slovak thats it, but the names suggest other wise. However my dads sibilings have the tendon ha.
neither my wife or i have it.
I was a champion power lifter. But i have an enormously weak grip given the strength of my body. Perhaps this would explain why?