Osteopathy: Biomechanics of the spine. Static function.

BIOMECHANICS OF THE SPINE

We could consider the spine as the most important and complex element of our bone structure.

Also quite important in osteopathy, since the greatest number of ailments, which are the responsibility of this specialty focus on the spine, or by reflection in their metameric areas.

The backbone or spine to reconcile two contradictory elements are mechanical: the rigidity and flexibility.

Rigidity is possible because the entire structure is surrounded by reinforcements: the fascia, muscle, fascia and ligaments.

The flexibility is possible thanks to consist of 24 pieces plus the sacrum, all superimposed.

The spine has three specific functions
1. - A static function allotted to the vertebral bodies and discs.
2 .- A kinetic function through the posterior arch (interapofisiarias joints, transverse and spinous processes).
3 .- Finally, a protective role played by the medullary canal.

Static function of the column
The vertebral bodies are larger in the lumbar (for supports more weight) and volume decrease in scale upwards to the neck. The natural curvature of the spine is determined by a slight wedge shape with the discs.

Are natural curvatures in the lumbar lordosis, kyphosis in the dorsal and light in the cervical lordosis.

The intervertebral discs develop the role of shock absorbers, rotary bearings and axial pressure, due to the weight of the body and its field of mobility.

The record supports the compression better traction. The front is more resistant to compression than posterior. The height or thickness of the discs varies with weight bearing.

From highest to lowest:
At lumbar level 9 mm.
A dorsally 5 mm.
At cervical level 3 mm.

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*Automatic Translation