Document Detail


Electric versus magnetic transcranial stimulation of the trigeminal system in healthy subjects. Clinical applications in gnathology.
MedLine Citation:
PMID:  9467995     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This investigation is focused on the analysis of the masseter responses evoked by means of magnetic and electric stimulation of the cortex and root of the trigeminal system of 20 healthy subjects. Moreover, in order to determine jaw elevation in centric occlusion, the analysis also focused on the motor response of the trigeminal bilateral roots evoked simultaneously using two stimulators. The masseter responses show a high level of symmetry in both latency and amplitude. The difference between the hinge axis in natural centric occlusion (CO) and in centric relation (CR) as determined by electric and magnetic transcranial stimulation is lesser than 2.5 mm. This is due to two main factors: (i) the response is evoked from the trigeminal motor neural pool involving all the masticatory muscles and hence simulating the natural 'muscular coactivation'; (ii) there is no manual manipulation to guide the jaw into the centric relation (CR). This method could be of some help for diagnosis in patients suffering from TMJ dysfunction who have lost stereognostic control over the jaw and display obvious signs of deviation during closure of the mandible.
Authors:
G Frisardi; P Ravazzani; G Tognola; F Grandori
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of oral rehabilitation     Volume:  24     ISSN:  0305-182X     ISO Abbreviation:  J Oral Rehabil     Publication Date:  1997 Dec 
Date Detail:
Created Date:  1998-03-24     Completed Date:  1998-03-24     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0433604     Medline TA:  J Oral Rehabil     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  920-8     Citation Subset:  D; IM    
Affiliation:
Dipartimento di Neurofisologia del Dolore, Università La Sapienza, Roma, Italy.
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MeSH Terms
Descriptor/Qualifier:
Adult
Centric Relation
Dental Occlusion, Centric
Electric Stimulation*
Evoked Potentials / physiology
Evoked Potentials, Motor / physiology
Humans
Magnetics / diagnostic use*
Mandible / physiology
Masseter Muscle / innervation,  physiology*
Masticatory Muscles / innervation,  physiology
Motor Cortex / physiology
Motor Neurons / physiology
Muscle Contraction / physiology
Neural Pathways / physiology
Pyramidal Tracts / physiology
Reaction Time / physiology
Reflex, Stretch / physiology
Spinal Nerve Roots / physiology
Stereognosis / physiology
Temporomandibular Joint Disorders / diagnosis,  physiopathology
Trigeminal Nerve / physiology*
Trigeminal Nuclei / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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