Trigeminal Projections to the Cerebellum

Elias, Stephen A.

doi:10.1007/978-1-349-08964-2_6

Cited by 4 publications

(2 citation statements)

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“…It can be speculated that descending activation from cortical or subcortical structures, modulated by proprioceptive and somatosensory reflexes, may contribute to the final movement pattern. There is evidence of trigeminal proprioceptive input to the cerebellum, directly (Jacquart & Strazielle 1990;Donga & Dessem 1993) as well as indirectly via the mesencephalic nucleus (Eller & Chan‐Palay 1976;Ito 1984;Nomura & Mizuno 1985;Elias 1990), which in turn may act on neck motoneurones via a variety of pathways (cf. Hirai 1988).…”

Section: Discussionmentioning

confidence: 99%

Concomitant mandibular and head‐neck movementsduring jaw opening–closing in man

Eriksson¹,

Zafar²,

Nordh

1998

J of Oral Rehabilitation

125

100

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To test the hypothesis of a functional relationship between the human mandibular and cranio‐cervical motor systems, head‐neck movements during voluntary mandibular movements were studied in 10 healthy young adults, using a wireless optoelectronic system for three‐dimensional (3D) movement recording. The subjects, unaware of the underlying aim of the study, were instructed to perform maximal jaw opening–closing tasks at fast and slow speed. Movements were quantified as 3D movement amplitudes. A consistent finding in all subjects was parallel and coordinated head‐neck movements during both fast and slow jaw opening–closing tasks. Jaw opening was always accompanied by head‐neck extension and jaw closing by head‐neck flexion. Combined movement and electromyographic recordings showed concomitant neck muscle activity during head‐neck movements, indicative of an active repositioning of the head. No differences in 3D movement amplitudes could be seen with respect to speed. The head movement was 50% of the mandibular movement during jaw opening, but significantly smaller (30–40%), during the jaw closing phase. In repeated tests, the 3D movement amplitudes of the concomitant head movements were less variable during slow jaw movement and during the jaw opening phase, than during fast and jaw closing movements, suggesting speed‐ and phase‐related differences in the mechanisms controlling the integrated mandibular and head‐neck motor acts. The present results give further support to the concept of a functional trigemino‐cervical coupling during jaw activities in man.

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Section: Discussionmentioning

confidence: 99%

Concomitant mandibular and head‐neck movementsduring jaw opening–closing in man

Eriksson¹,

Zafar²,

Nordh

1998

J of Oral Rehabilitation

125

100

View full text Add to dashboard Cite

show abstract

“…This central motor program is modulated by peripheral inputs (from oral, muscular and temporomandibular joint receptors), and by upper central information from the cortical masticatory area, subcortical structures (e.g. caudate-putamen complex, thalamus, amygdala, hypothalamus which are implicated in feeding behaviour) [67,109] and from the cerebellum [36,109]. This modulation explains the variability of mastication between different subjects and in the same subject along a chewing sequence: mastication depends both on intrinsic characteristics (age, gender, occlusion, and TMD) of the subject and on extrinsic characteristics (food bolus) [156].…”

Section: Neurophysiological Effects Of Exercisesmentioning

confidence: 99%

Localised muscle pain and dysfunction: a review of theoretical and suppositional biological effects of jaw exercises

Fougeront

Fleiter

2010

J. Stomat. Occ. Med.

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For the treatment of localised masticatory muscle pain, it is still unknown whether exercises have any efficacy. The understanding of these supposed biological effects is linked to the pathophysiological model of localised myofascial pain and dysfunction (MPD). (1) Motor activity: In MPD, the pain adaptation model implies that there is an agonist-antagonist co-activation. In healthy muscles, training exercises allow a tendency to a switch from agonist-antagonist co-activation towards reciprocal inhibition, either during isometric contractions or during isokinetic contractions. (2) Hemodynamics: In MPD, a hypoperfusion is supposed. In healthy muscle, training exercises enhance the functional hyperaemia.(3) Histology: (a) In females with localised trapezius myalgia, but not in males, there is a decrease in capillarisation. Exercises induce capillary angiogenesis in healthy muscles, and also in females with trapezius myalgia. (b) In myalgic females, but not in males, there is a tendency towards a higher proportion of type I fibres; exercises decrease the proportion of type I fibres, with a reciprocal increase of type IIA fibres (phenotypic conversion). (4) Biochemistry: There may be a cytochrome c oxidase (COX) deficiency that could explain the lower ATP concentrations in female patients. Exercises induce a decrease in the proportion of COX-negative fibres. Finally, a 10-week training program might have specific positive effects. Physiological mastication could be both a natural means of re-education and one of the goals of treatment.

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Variation in the masseteric silent period in older dentate humans and in denture wearers

Kossioni

Karkazis

1995

Archives of Oral Biology

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Trigeminal Projections to the Cerebellum

Cited by 4 publications

References 0 publications

Concomitant mandibular and head‐neck movementsduring jaw opening–closing in man

Concomitant mandibular and head‐neck movementsduring jaw opening–closing in man

Localised muscle pain and dysfunction: a review of theoretical and suppositional biological effects of jaw exercises

Variation in the masseteric silent period in older dentate humans and in denture wearers

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