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"In order to gain knowledge, one should refrain from believing" - Leibnitz

Comportemental troubles
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To correctly understand this heading:
Remember that any stressed person who continuously clenches his teeth can elicite remote pain and associated dyscomforts from teeth (which are not only painful organs but also tactile one like the thumb and the index in opposite situation)
If You are interested the scientifical data are shown lower.
idee.jpg Don't forget to consult the associated headlings : "Clinical Data" and "Witness and experience"

(aggressiveness, unstable temper…)

Comment :

Important research about non-algic inputs that may come from teeth is surprising. EATING DISORDERS
(excessive appetite variability)
Keep in mind that a stressed person’s teeth, when clenched too tightly or for too long, will send harmful information to a small gland located in the brain: the hypothalamus. It is scientifically proven that teeth send information to the hypothalamus. In some cases the information ends up in the ventromedian nucleus, the center of feeding behavior, which may then be disturbed by the excess information – a situation that leads to what doctors refer to as bulimia. Bulimia can lead to obesity. Stopping jaw clenching and grinding of teeth can lead to weight loss. The following testimony describes the onset and cessation of weight gain. What’s more, teeth send information (again the fact is scientifically proven) to the center of feeding behavior. Stopping the jaw and teeth clenching may explain weight loss, and may also explain a lack of appetite. See also (ANOREXIA).



Molina OF, dos Santos J Jr. (2002) Hostility in TMD/bruxism patients and controls: a clinical comparison study and preliminary results. Cranio. 20 ; 4: 282-8

This study involved a group of 110 TMD/bruxing behavior patients (30 mild, 40 moderate, and 40 severe bruxers) which was compared to a group of 40 nonTMD/nonbruxer controls, with the objective to test the alternative hypothesis that, regarding hostility, there were significant differences between these groups.
( ..................) These results suggest that in these subgroups of TMD/bruxers, increased depression corresponds to increased hostility and provides support for previous investigations indicating that there is a relationship between hostility and bruxism (but only in the groups with moderate and severe bruxism).
Comments :
- The teeth send informations to the hypothalamus.
- The hypothalamus is close to the amygdalia (this is not the amygdalia of the throat).
- The amygdalia is the nervous center of hostility ; it communicates with the hypothalamus.
- So it could be logical that a patient who strongly clenches his or her teeth might have a behavior of hostility.

Trub M, Mei N (1991) Effects of periodontal stimulation on VHM neurones in anesthetized rats. Brain Res Bull 27; 1: 29-3

In anesthetized rats, mechanical stimulations, the direction and intensity of which could be modified, were applied to the superior incisive while single neurone activities were recorded within the VHM region by means of extracellular glass microelectrodes. The great sensitivity of periodontal receptors to the direction and the intensity of the stimulations was demonstrated at this level. This finding, which is reported here in detail for the first time, suggests that the periodontal afferents might be involved in physiological mechanisms including food intake regulation and osteomorphogenesis.

Comments : Since 1991, our team internationally enlightened that tactile dental receptors project to the hypothalamus. By microelectrode method that was invented by Noel MEI in the Neurobiology Laboratory of C.N.R.S (Marseille - France) ,It has been specified that each dental information provoked either a positive or a negative response in the hypothalamic cells. It is logically infered from that the alimentary comportment might be modified towards hyperphagia (bringing obesity) or towards anorexia. We beleive that these fundamental data are very important for clinicians about mental anorexia in young females. Does the young patient clench her teeth ?

Takero Otsuka, Kazuko Watanabe, Yoshiyuki Hirano, Kinya Kubo, Shinjiro Miyake, Sadao Sato, Kenichi Sasaguri.(2009). Effects of Mandibular Deviation on Brain Activation During Clenching: An fMRI Preliminary Study. J of cranio practices 27,2- 88-108

Using functional magnetic resonance imaging (fMRI) in eight healthy human subjects, the present study measured blood oxygenation level-dependent (BOLD) signals during clenching in a malocclusion model, using a custom-made splint that forced the mandible to a retrusive position and a splint of no modification for control, and compared the results to the BOLD signals during the corresponding
resting conditions. An individual visual analog scale (VAS) score was also examined during clenching to evaluate the interactions between fMRI data and psychiatric changes. During both clenchings, activations in four brain regions (premotor cortex, prefrontal cortex, sensorimotor cortex, and insula) were seen. However, clenching in the malocclusion model, with psychological discomfort, increased additionally BOLD signals in the anterior cingulate cortex and the amygdale. Furthermore, there was a parallel relationship between BOLD signal intensities and VAS scores in these two regions. The findings may suggest the involvement of clenching with malocclusal conditions in the emotion and/or pain related neural processing in the brain.

Bibliography :

Molina OF, dos Santos J Jr. (2002) Hostility in TMD/bruxism patients and controls: a clinical comparison study and preliminary results. Cranio. 20 ; 4: 282-8
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