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Why is almost everyone right-handed? A new study connects it to bipedalism
31–40 of 263 posts
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#32What does it say for mixed-handed folks like myself (different skillsets per hand - in other words, throw and write with different hands)? What about cross-dominance (different body parts differ on dominant side - in other words, a right-handed person being left-foot dominant)? I've been told that it's effectively a mental illness if discovered during childhood (as is ambidexterity). Yet I can't help but think that i…
You were probably a left-handed person who was taught to write/use tools with their right hand in kindergarten. I got this treatment too.
When was that? I know it used to happen, but I haven't heard of or seen that in my lifetime, I'm nearly 60.
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#33What does it say for mixed-handed folks like myself (different skillsets per hand - in other words, throw and write with different hands)? What about cross-dominance (different body parts differ on dominant side - in other words, a right-handed person being left-foot dominant)? I've been told that it's effectively a mental illness if discovered during childhood (as is ambidexterity). Yet I can't help but think that i…
Left-footed and right-handed. I find my "handedness" follows where the activity is driven from (upper/lower body).
Soccer, snowboarding, batting, golfing: lefty
Writing, throwing, tennis, pool: righty
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#34Earlier quoted context omitted.
You were probably a left-handed person who was taught to write/use tools with their right hand in kindergarten. I got this treatment too.
When was that? I know it used to happen, but I haven't heard of or seen that in my lifetime, I'm nearly 60.
Probably because it didn't happen to you, or kindergarteners don't know better and just play along. I only remember it because I was a little shit and got into a big fight about it. It would have been late 80s.
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#35Earlier quoted context omitted.
Here’s my multiple years of anatomy classes response: the heart isn’t on the left. The aorta is, sure, but the vena cava is on the right. Also people with situs inversus (essentially all organs flipped laterally from “normal”) aren’t obviously more prone to left-handedness.
>Here’s my multiple years of anatomy classes response: the heart isn’t on the left. Why is the left lung smaller, then?
More piping to and from the heart exists on the left instead of the right?
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#36Earlier quoted context omitted.
Here’s my multiple years of anatomy classes response: the heart isn’t on the left. The aorta is, sure, but the vena cava is on the right. Also people with situs inversus (essentially all organs flipped laterally from “normal”) aren’t obviously more prone to left-handedness.
>Here’s my multiple years of anatomy classes response: the heart isn’t on the left. Why is the left lung smaller, then?
not only smaller but having 2 lobes rather than 3, the left lung is possessed of a featureknown as the cardiac "notch" an involution of the lobe that corresponds to the larger left ventricle of the heart.
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#37I am curious at what age hand preference develops. And can you exert any influence on that development?
In particular, I would expect the influences to be somewhat counter intuitive. With things like having to use the left hand to hold a caregiver's hand in early walking preferencing the right for accessory use. At infant ages, it would be neat to see if preference of holding a baby on a side influences things.
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#38Earlier quoted context omitted.
When was that? I know it used to happen, but I haven't heard of or seen that in my lifetime, I'm nearly 60.
Probably because it didn't happen to you, or kindergarteners don't know better and just play along. I only remember it because I was a little shit and got into a big fight about it. It would have been late 80s.
I didn't know what difference it made and there was one left handed scissors so it went to the kid who knew. I'm left eyed and often wonder if I should have learned to write left handed.
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#39Earlier quoted context omitted.
>Here’s my multiple years of anatomy classes response: the heart isn’t on the left. Why is the left lung smaller, then?
More piping to and from the heart exists on the left instead of the right?
the Aorta and Vena Cava are muchmore central than sinistral.
the aortic arch begins decent left of the coronary corpus, but becomes centralized, tandem with the Vena Cava.
Re: Why is almost everyone right-handed? A new study connects it to bipedalism
#40What does it say for mixed-handed folks like myself (different skillsets per hand - in other words, throw and write with different hands)? What about cross-dominance (different body parts differ on dominant side - in other words, a right-handed person being left-foot dominant)? I've been told that it's effectively a mental illness if discovered during childhood (as is ambidexterity). Yet I can't help but think that i…
I'm sorta here too. I'm right handed, no external pressure to use one hand or the other in early age. Mother is a lefty, father is a righty. As a result I often used the computer mouse on either side as a kid, really wherever it was left by the last user.
Learned to shoot a bow as a kid but only learned as an adult I'm left eye dominant, and to take advantage would require re-learning the bow in my left hand(many many strikes on my arm sent be back to a righty). Shooting guns is a similar situation, but I'm a fairly good shot regardless. It definitely makes using sights weird.
I'm semi-ambidextrous too, with enough focus I can somewhat cleanly write with either hand, and I'm generally good with my hands in fine tasks, with only a minor preference to pick up a tool with my right hand.
I wonder how common this is. People seem surprised when I demonstrate my left handed writing.