How is the body like a sailboat?

[Diane]

http://www.andrews.com/kysc/terms.html#diagram

I decided to take a look. Some parts are easy, like the spine as a "mast".. I think the ASISs are like the "outhauls" which near as I can figure are the outer ends of the "boom" (in the body there are two booms, I guess the Superior pubic rami...) The pubic symphysis is like the prow. There are all sorts of names for rigging that stress and balance all the structural parts. The aponeurotic sheets are like sails, don't you think? The body boat is rounder, and layered, but there seems to still be plenty of rigging.

Who can name parts of the body that are like parts of a sailboat? There are lots of ropes that have to slide through parts of the boat, and are specially thickened so they won't slide beyond a certain point.

There can be nested boats, and stacked boats too.. a fun way to think about anatomy. Even if it is a somewhat Cartesian exercise, I think it's an interesting way to consider anatomy, and the forces that are exerted from within and from without.
Have fun,
Diane

[bernard]

Diane,

It is the Kapandji approach of biomechanics...

The idea of the boat is quite old but useful to understand that pulling a rope may pull another and deforms the whole structure. The trunk may have a more complex approach since there is two boats!

[bernard]

Hi Diane,

http://www.ati-net.com/levin.htm

The tensegrity models fits better my opinion. :wink:

[bernard]

http://www.somasimple.com/images/tensegrity.jpg

I know, this image is not very relevant at first view but it's mine :wink: . I was fascinated by maths and physics and how Nature creates ever curves (smoothness) with straight lines. I think that it totally the same thing with our body? It is also we are looking to straight lines with PT and Medicine, but only curves may be interresting!

A bit philosophic, here! :oops:

[Diane]

Nice eye-dea.

How about this thought too? that all cells want to have roundness; spheres are the most economical ratio of matter versus surface area in space, but in the body all cells have to compromise a little (except for that extremely sphereical egg cell!)... and accommodate to being misshapen by their connections to other cells, pulled into flattened star shapes or plate shapes, or squished into cylinders..

How about this corollary then, to give cells space, to help them breaths, is to help the neuromatrix function better...

Back from your holiday already Bernard?
Diane

[bernard]

Diane,
spheres are the most economical ratio of matter versus surface area in space

This affirmation is true for Physics but fails with Nature since communication implies the maximal surface between cells and spheres are the worst candidate for communication. Contact surfaces are reduced to spots and spots do not leave enough space for that.

My drawing was an intent to solve your problem since you can make a sphere with lines and using lines give surfaces and surfaces gave to cells, room for communication.

This kind of drawing is a solution/walk around and a huge simplification. I couldn't draw directly curves in my drawing (too complicated, too much equations) so I biased the problem with lines and the solution stay visible and if you create the volume shown in it, it will take the least surface as in a sphere but it is very difficult to solve it mathematically.

But this simplification is done with cells, too. A body may not use spheres but more a deformed/simplified one that give us force/stability/communication.

[bernard]

Here is some hidden curves created by straight lines.

http://www.somasimple.com/images/tensegrity2.jpg

they have the best shapes and resistance to pressure/ torsion...

[Diane]

Nice...:)
Diane