Pain and your brain

The perception and processing of pain information happens in your brain. Without your brain you could not have the opportunity to experience pain. Phantom pain is an interesting example of how the brain works. People who have lost a leg, for example, will complain of toe pain on that side, even though they have no toes. How is that possible? All we can say: the area of the brain that represents the pain perception of the toes is activated. Why, we cannot state, at least not in this context. This leads to the subjective experience of pain, even though there are no pain fibers from the toes to the brain.

All sensory information from the periphery, including pain, is channeled through the Thalamus to the cortex. The Thalamus is the main relay for all incoming sensory information.

Pain fibers are always "on" Our brain has two functions with respect to pain perception. One area of the brain receives the incoming pain fibers from the periphery via the Thalamus in order to facilitate the experience of pain. Another area of the brain fires down to the Thalamus to inhibit and dampen that transmission of pain. Here is an important thing to remember: pain fibers, similar to other neurons, fire at all times. This is essential to their survival. If they did not fire, they would degenerate and eventually die.

Brain inhibits pain perception

If it were not for the pain inhibition of the cortex, we would experience pain at all times. The problem arises when normal brain function declines in one or both brain hemispheres. The brain's capacity to inhibit pain perception would decline. This could lead to what we call intractable pain syndromes. The most difficult and frustrating cases for many of us in the health care field are those patients who present with these pain syndromes, with no history of trauma to explain them. These people simply hurt. Medication of varying strength has been used extensively, with less and less effectiveness.

The biggest mistake we all tend to make is to look only at the area of pain. There has to be an explanation for this person's suffering right there. When we cannot find a physical reason, we either give up, or we declare that it must be "psychological", that "it is all in your head". We give it fancy names such as "psychosomatic", etc.

Brain hemisphericity

Most of these names only cover up our helplessness and ignorance as to the true cause of their suffering. Actually, it may well be all "in their head". Besides looking at the area of pain, it is of vital importance to also investigate brain function. Once we understand that normal brain function is designed to inhibit pain perception, we must look for a way to evaluate the person's brain state. A neurological examination by a skilled chiropractic neurologist will easily reveal brain hemisphericity, the relative under-functioning of one brain hemisphere compared with the other.

Brain specific therapy

Once we have determined that there is no pathology in the area of pain, or anywhere else for that matter, we then have to decide how to best increase the function of the under stimulated brain hemisphere. The strongest sensory feedback from the periphery to the brain is via large diameter myelinated nerve fibers (Ia fibers), especially those from joint mechanoreceptors and muscle spindles. Brain hemisphere specific chiropractic adjustments on the side of the body opposite to the brain hemisphericity are exquisite ways to activate the brain function where it is needed. The brain can also be stimulated with light, sound, smell, taste, movement, etc.

For a successful outcome it is vital that all therapies are brain based. Their application must have a sound neurological basis. If you stimulate the "wrong" side, you may end up making the brain hemisphericity worse. This may lead to increased pain perception. From www.drz.org