Assessment of Brainstem Reflexes with Transcranial Magnetic Stimulation in Bruxism: The Role of Central Mechanisms in Pathophysiology

Authors : Bilgin Ali Şentürk, Gaye Yildirim, Ayşegül Özer Çelik Çelik, Ibrahim Öztura

Pages : 122-129

Doi:10.29228/erd.56

View : 141 | Download : 64

Publication Date : 2023-12-26

Article Type : Research Paper

Abstract :Objectives: We aim to prove the central etiology hypothesis for bruxism, we plan to examine the structural components that contribute to the occurance of RMMA/Bruxism such as cortical, subcortical structures and as a key roleplaying component, the brainstem structures by investigating the MEP, CSP, MIR (SP1 and SP2) and the blink reflex (R1 and R2) and central conduction time. Materials and Methods: In this study, a total of 77 subjects investigated to find any difference between the two groups. The MIR and blink reflexes studied by transcranial magnetic stimulation (TMS) and electric stimulation. The cortical silent period (CSP) evoked in contralateral masseter muscle by TMS. Central motor conducting times were evaluated. Results: The absence of SP2 (component of MIR), R2 (component of blink reflex) latency and left APB (abductor pollicis brevis) muscle F wave latency are found to be significantly different between two groups. Conclusions: As a result of our study, the loss of the SP2 component and the prolongation of the latency of the R2 component, and the localization of reflex circuits in the brainstem, although their pathways are separate, bruxer suggested that the pathophysiology may have a central origin in most of the bruxers.
Keywords : Bruksizm, Transkraniyal Manyetik Stimülasyon, Masseter Inhibitor Reflex

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