Pathological Anatomy
These discs, being unique
structures, break in a unique, pressure-induced, manner
by herniating. When a disc is said to "herniate",
that technically means that a portion of the nucleus pulposus
or other disc material has pushed through an anatomical
structure meant to otherwise contain it. Many physicians
refer to a herniation only when disc material
is pushed through the outer capsule. This misuses the term
because, then, they cannot rationally reconcile the painful
events preceding a full protrusion or extrusion with their
conception of a "herniation." In fact, a herniation
in the absence of a protrusion is very capable of causing
pain.

In this book, a herniation is used in the universal, medical,
definition as being anytime a portion of the anatomy protrudes
through an abnormal body opening, even if that body opening
is only a few innermost layers of the annulus fibrosus (See
Figure 16).


When a disc is said to "bulge,"
or "protrude" that should be taken to mean that
the central material herniates or pushes through the annulus
fibrosus to such an extent that it presses upon the ligamentous
capsule causing it to deform and bulge outward (See Figures
17 & 18).

When a disc is said to "prolapse,"
that is usually taken to mean that the disc material has
herniated through the capsule (See Figures 19 & 20).
When
a disc completely herniates through the capsule it "extrudes,"
the ordinarily central material tears through the ligamentous,
peripheral, capsular structures and often enters the spaces
adjacent to the spinal column (See Figure 21).
Additionally, as a disc suffers multiple damaging events
such as these, at many and varied sites within the discs,
it can be said to "degenerate." When this is the
case, the bulk of the inner structural integrity is lost
and the annulus fibrosus and nucleus pulposus can become
a poorly functional conglomeration of broken fibers and
pieces of cartilaginous debris. This "degenerative
disc disease" usually comes later in life and is sometimes
so severe as to have only the capsule functioning to connect
one vertebral bone to the adjacent one.
The
concepts in this book apply to all these levels of damage
but more so to that period of time when a total degeneration
of the disc has not yet taken place. Even though this places
limitations on the ability of The O'Connor Technique
(tm) to benefit all disc related problems, nevertheless,
the time in which relief can be expected is substantial
and the principles still can be applied to relieve pain.
Further Reading:
Spinal Anatomy
Directional Terminology
Structural Anatomy
Functional Anatomy
Pathological Anatomy
Disc Hydraulics / Mechanics
Compression Forces
Correlation
of Mechanical Anatomy with Disc Pain
Traction Forces
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