Replies to zut’s post: “Are all flatfish of the same handedness?” resulted in information that some species of flatfish were ‘ambidextrous’ some not, some rh, and some lh.
I have read somewhere that all homo sapiens are not of the same handedness?
That one person in several 10 thousands were lateralaly reversed right to left.
Does anyone have certain knowledge of this?
What are you talking about ?
Obviously some people are left handed, so I guess that’s not what you mean. Do you mean to ask whether some people are physically constructed as a mirror image to the rest of us?
The answer, strange as it is, is yes. It’s called Situs Inversus, and it’s found in about 1 in 10,000 people.
This is pretty interesting. I’ve never heard of this condition.
Are Situs Inversus people mostly left-handed?
(NB: I’m not asking if left-handedness generally is caused by Situs Inversus, but rather whether the handedness of the person is also one of the things that also gets reversed.
No idea, really, but my guess would be that they are approximately 90% left-handed and 10% right-handed, the reversal of the proportion in “normal” people.
That was my initial thought, but on reading that lined resourece, it sounds like the reversal may be limited to the organs in the abdomen - reversal of handedness (in this case) would seem to require something more system-wide than that.
I’d heard of people with heart and lungs shifted, but never anything like that.
I wonder if Situs Inversus also gives you two right feet.
That would be Situs Inversus Clutsus
On actual left handedness, handedness would seem to be an effect of the construction of the brain. Does Situs Inversus include a mirror of the brain’s construction as well?