|
mark indigo -> RE: Why is this???? (Dec. 5 2013 20:29:04)
|
quote:
Every mammal has effectively two sides to their bodies. Dorsal and ulnar. One side faces the sun and the other the earth. As far as I know the opposite of dorsal is ventral. We can refer to the back of the hand as the dorsal, but the opposite would then be the palmar.
Dorsal faces the sun in animals that walk around on 4 legs, but in humans the dorsum is the back, so we would have to lie on our fronts for our dorsum to be towards the sun.
The ulna is a bone in the forearm. The other bone in the forearm is the radius.
In standard anatomical position the ulna is closest to the body, which is called medial, while the radius is further from the body, which is called lateral.
quote:
In order for it to move around and gather resources it has to escape gravity so it needs to strengthen which side first ? Well the dorsal side of course, so muscles with attachments on this side develop first and stronger. Yes not just first and faster but also stronger, much much stonger. It takes a lot more power to jump than to crouch.
It only feels like your flexers are stronger because you feel yourself make more effort. If you think about this then that should tell you something. It is not possible to "escape" gravity unless you go up into space. Because we are in it all the time, and have been throughout evolution we have come up with a much better solution to holding ourselves up than burning energy using our muscles. That solution is bones. Standing requires very, very little muscular effort, because the weight of the body is supported by the bones.
I think that where the hand is concerned the flexors are stronger, and I assume this is because grasping a branch or an axe needs more strength than letting it go.
quote:
Or chopping wood. You give the axe head energy when your extensors throw it up and then you try and channel this energy by using your whole body coordination to allow a smooth arc so as not to inhibit acceleration with gravity. If you shorten the arc (by using your flexors,which can only shorten your arms) then the axehead will not achieve optimum velocity and the blow will be less effective. How much wood do you chop? If you merely lift an axe, even a really heavy one, and then let it fall under gravity alone you are not going to split many logs, unless they are made of balsa wood! You have to add muscular force to the force of gravity if you want to chop wood.
|
|
|
|
