Aceves-Rodríguez R, Sosa-Luna CA, Duvignau-Dondé E

Language: Spanish
References: 15
Page: 13-20
PDF size: 306.82 Kb.

ABSTRACT

Objectives: To describe the electrophysiologic changes existing in individuals with Bell’s palsy (BP) on the facial nerve having been stimulated by means of transcraneal magnetic stimulation (TMS), and to establish the reference values in healthy individuals belonging to the Mexican population.
Material and methods: The present paper is an experimental, transverse, observational and descriptive study were the facial nerve was stimulated bilaterally in 38 BP patients and in 38 healthy individuals by means of EMT, registering the motor action potentials (MAP) by transcutaneous recording electrodes placed on four facial ipsilateral muscles to the stimulated side. The equipment used was a MagPro R30 magnetic stimulator with 2 Teslas of maximum intensity.
Results: In the BP patients the typical finding was the significant decrease of the MAP’s amplitudes (p ≤ 0.001) in the side affected in all the registry sites; the MAP’s latencies did not show statistically significant prolongation in the affected side of the patients with PB in comparison with the obtained ones in the control group.
Conclusions. We established the reference values of the facial nerve EMT in the Mexican population and that the preponderant finding in the patients with PB is the significant decrease or MAP’s absence in the affected side.

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