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Troubles of sleep
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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"

- hard falling asleep
- non restoring sleep
- hard concentration

Comment :
Research in the USA has today a great share in possible links between TMD and sleeping troubles.
About from clenching sleeping troubles : trigeminal (so dental) inputs are known to possibly project to a nervous center : the locus coeruleus which participates to sleeping mechanisms.
This structure was called by ancient french anatomists : trigeminal vegetative nucleus.
By the way, the clinical notices from different clinicians give evidence of a recovered sleeping quality after stopping the parafunctional clenching.

scientific data
M.Dutschmann, H.Herbert (1999 Pontine cholinergic mechanisms enhance trigeminally evoked respiratory suppression in the anesthetized rat,
J. Applied. Physio. 87,3: 1059-1065

We speculate that activation of sensory trigeminal afferents (ie: from teeth) during REM sleep might contribute to pathological REM sleep-associated respiratory failures.

Bibliography :

Collesano V, Segu M, Masseroli C, Manni R (2004) Temporomandibular disorders and sleep disorders: which relationship? Minerva Stomatol 53; 11-12: 661-8

Kunzle H (1998) Origin and terminal distribution of the trigeminal projections to the inferior and superior colliculi in the lesser hedgehog tenrec. Eur J Neurosci 10; 1: 368-76

Takamatsu J, Inoue T, Tsuruoka M, Suganuma T, Furuya R, Kawawa T (2005) Involvement of reticular neurons located dorsal to the facial nucleus in activation of the jaw-closing muscle in rats. Brain Res 7; 10551-2: 93-102

Travers JB, Yoo JE, Chandran R, Herman K, Travers SP (2005) Neurotransmitter phenotypes of intermediate zone reticular formation projections to the motor trigeminal and hypoglossal nuclei in the rat. J Comp Neurol 18; 488, 1: 28-47

Veinante P, Deschênes M (1999) Single- and Multi-Whisker Channels in the Ascending Projections from the Principal Trigeminal Nucleus in the Rat. J Neurosc 19; 12: 5085-95

Yasui Y, Kayahara T, Shiroyama T, Nakano K (1993) Neurons in the intertrigeminal region of the rat send projection fibers to the superior colliculus. Neurosci Lett 3; 159, 1-2: 39-42

Yatani H, Studts J, Cordova M, Carlson CR, Okeson JP (2002) Comparison of sleep quality and clinical and psychologic characteristics in patients with temporomandibular disorders. J Orofac Pain 16; 3: 221-8

Zhou J, Shore S (2006) Convergence of spinal trigeminal and cochlear nucleus projections in the inferior colliculus of the guinea pig. J comp Neurol 1; 495, 1:100-12
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