View Full Version : Understanding the relationship among the bones, muscles, and joints.
AikiWeb Sponsored Links
Place your Aikido link here for only $10!
This is from the "Anatomy Trains" website, http://www.anatomytrains.com, and is a good explanation of the structure of the body.
Caution, there is some pictures of parts of a dissected body.
04-06-2010, 09:12 PM
That is a pretty educational slide deck.
thanks a lot for posting that. I think i had seen that before but forgot about it.
How does being a tensegrity structure effect you? :]
Can you wiggle your ears by moving your toes?
i had first heard about, and thought about the fascial stuff when i was doing the Ming Method (book on fascial stretching) stuff. It really made real, and undeniable, some of the interconnections in the body. pretty strange to see some of that in the slide deck.
Can you wiggle your ears by moving your toes?
Maybe the eyebrows.
The Superficial Back Line from Anatomy Trains website, http://www.anatomytrains.com/explore/galleries/show/id/160?page=1
Here is a short interactive animation of the cell as a tensegrity structure.
This is from the 'Children's Hostpital Boston'.
While this is about the structure of the cell, the body structure is organized similarly.
More information about the tensegrity structure of the cell is here,
at the 'Ingber Lab' website at Harvard Medical School
This is an explanation by Dr. Stephen Levin of why the spine should not be viewed as a load bearing column using Newtonian mechanics.
"This is all based on Newtonian mechanics as it would be applied to a column or building built with rigid materials and standing in one place on solid ground. But humans, and all biologic structures, are mobile, omnidirectional, gravity independent structures built of 'soft materials', foams, colloids and emulsions, (bone and wood are stiff foams, like styrofoam), and mechanicals laws as applied to these structures may be different. It is impossible to explain the mechanics of a dinosaurs neck using standard Newtonian "
PRESENT SPINE MODELS
It is a teleological conceit that the human spine acts as a column. From gestation to age one, it never acts as a column. The human spine evolved from quadruped and lesser spines. Phylogenetic and ontogenetic development of the human spine was not in the form of a column, but as some form of a beam. It cannot be an ordinary beam, a rigid bar, but an extraordinary beam that is composed of semi-rigid body segments connected by flexible connective tissue elements that float the segments in space. In many postures, the adult human spine does not function as a column or even a simple beam. When the spine is horizontal, the sacrum is not a base of a column but the connecting element that ties the beam to the pelvic ring.
Even when upright, the vertebral blocks are not fixed by the weight of the load above, as they must be in an architectural pillar. The hallmark of a pillar is stability but the hallmark of a spine is flexibility and movement. Biologic structures are mobile, flexible hinged, low energy consuming, omni-directional structures that can function in a gravity free environment. The mechanical properties are non-Newtonian, non-Hookian and nonlinear. Columns need a stable base on which to rest. Therefore, columns are not useful as a model for fish or fowl or man in space. A post and beam is inadequate to model the neck of a flamingo, the tail of a monkey, the wing of a bat or the spine of a snake. Joints are slippery slopes and shear cannot exist in a frictionless joint. All forces must be normal to the surface to transmit loads. Post and beam modeling in biologic structures could only apply in a perfectly balanced, rigid hinged, immobile, upright spine with all joint surfaces normal to the force of gravity.
The spine can bend forward so a person can touch toes and bend backward almost equally well. It can twist and bend simultaneously. It can perform intricately controlled movements in space as done in gymnastics, dance, aquatic diving or basketball. With each breath, the interconnected vertebrae translate, some forward, some backward. While architectural columns bear loads from above the human spine can accept loads from any direction with arms and legs cantilevered out in any way. The hallmark of a pillar is stability but the hallmark of a spine is flexibility and movement. Movement of an articulated column, even along a horizontal, is more challenging than moving an upright Titan missile to its launch pad. 'S' shaped curves can create intolerable loads and instability in a column, particularly if it is a thin, articulated column that has flexible, frictionless joints, as the spine does. The spine is flexible, mobile, and functionally independent of gravity and has property behavior inconsistent with an architectural column or beam.
" Attack of The Fuzz"
This is from Gil Hedley on the importance of moving and stretching.
In the human body the connective tissues like muscles, tendons, ligaments etc and the fluids like blood plasma interstitial fluid and cellular fluid do not act like you would assume using Newtonian mechanics, linear reactions to tension and compression.
In fact the components of the body act nonlinear, Non-Newtonian.
The fluids of the body are Non-Newtonian fluids, they act like a solid when under stress and like a fluid when not.
vBulletin Copyright © 2000-2012 Jelsoft Enterprises Limited