I have frequently discussed the relation between headache, TMD and central sensitization. The trigeminal nerve is a frequent culprit in development of central sensitization which is why neuromuscular dentistry can be such an effective treatment. Decreases in nociceptive input from the trigeminal nerve can allow reversal of a sensitized state.
A new article in Pain "Pain." 2010 Oct 18. "Central sensitization: Implications for the diagnosis and treatment of pain." documents much of what we understand about central sensitization. These heightened central states are caused by noxious or nociceptive input into the brain. The trigeminal nerve carries a tremendous amount of information (nociception) into the CNS.
A recent article "Chronic Orofacial pain" proposes that "we propose the concept that because COFP and headaches share underlying pathophysiological mechanisms, clinical characteristics, and neurovascular anatomy, they should be classified together." This would be obvious to anyone who evaluates the anatomy and physiology of the brain and especially the stomatognathic system including the jaw muscles, teeth and periodontal ligaments. jaw joints and most importantly the trigeminal nerve. The trigeminal nerve is almost always indicated as a culprit or co-conspirator in chronic and episodic facial pain and headache .
The use of botox on jaw muscles to treat chronic headaches and migraines actually reduces nociceptive input to the trigeminal nerve from and brain from peripheral input. Neuromuscular dentistry also reduces nociceptive input withput the use of toxic nerve agents but utilizing antidromic TENS to relax muscles and establisha healthy physiologic rest position with minimal nociceptive input. Neuromuscular occlusion is simply a physiologic land spot that allows the muscle to return to a health rest position after function.
The computer adage "Garbage in- Garbage out" is what happens when nociceptive input to the brain exceeds our ability to comfortably adapt causing pain and central sensitization. Reduce the "garbage in" with neuromuscula dental techniques and the "garbage out" painful sequellae subside.
Curr Pain Headache Rep. 2010 Feb;14(1):33-40.
Chronic orofacial pain.
Benoliel R, Sharav Y.
Faculty of Dentistry, Department of Oral Medicine, Hebrew University-Hadassah, Jerusalem, Israel. benoliel@cc.huji.ac.il
Abstract
Chronic orofacial pain (COFP) is an umbrella term used to describe painful regional syndromes with a chronic, unremitting pattern. This is a convenience term, similar to chronic daily headaches, but is of clinically questionable significance: syndromes that make up COFP require individually tailored diagnostic approaches and treatment. Herein we describe the three main categories of COFP: musculoskeletal, neurovascular, and neuropathic. For many years, COFP and headache have been looked upon as discrete entities. However, we propose the concept that because COFP and headaches share underlying pathophysiological mechanisms, clinical characteristics, and neurovascular anatomy, they should be classified together.
PMID: 20425212 [PubMed - indexed for MEDLINE]
