Transcranial Cortical Magnetic Stimulation of Lower-Lip Mimetic Muscles: Effect of Coil Position on Motor Evoked Potentials

ORL ◽  
1999 ◽  
Vol 61 (3) ◽  
pp. 119-125 ◽  
Author(s):  
R. Rödel ◽  
R. Laskawi ◽  
H. Markus
Keyword(s):  
Evoked Potentials ◽  
Magnetic Stimulation ◽  
Motor Evoked Potentials ◽  
Lower Lip ◽  
Mimetic Muscles ◽  
Stimulation Of

Tongue Representation in the Lateral Cortical Motor Region of the Human Brain as Assessed by Transcranial Magnetic Stimulation

2003 ◽  
Vol 112 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Ralph M. W. Rödel ◽  
Rainer Laskawi ◽  
Holger Markus
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Muscle Activation ◽  
Motor Evoked Potentials ◽  
Contralateral Side ◽  
Lower Lip ◽  
Somatotopic Organization ◽  
Head Surface ◽  
The Face ◽  
Mimetic Muscles

Motor evoked potentials (MEPs) of the lingual muscles elicited by focal cortical transcranial magnetic stimulation (TMS) with a figure 8-shaped coil were investigated in 17 healthy subjects with special regard to amplitude and onset latency as a function of the coil position on the head surface. Bilateral reproducible responses could be observed at coil positions mostly varying from approximately 6 to 13 cm lateral to the vertex. During moderate muscle activation, maximum responses were obtained at a mean stimulus position of about 11 cm lateral and 3 cm anterior to the vertex with similar onset latencies, but with significantly higher amplitudes on the contralateral side (3.5 ± 1.9 mV, 9.5 ± 1.1 ms contralateral; 2.6 ± 1.5 mV, 9.7 ± 1.0 ms ipsilateral). Comparing our data on the orbicularis oculi muscle with the results obtained on lower lip muscles, we found a considerable overlap of those coil positions from which reproducible MEPs could be elicited in both groups of target muscles, but the lingual area was placed more laterally. Thus, a statistically significant separation of the cortical representation areas of lingual and lower lip mimetic muscles is possible by focal cortical TMS, reflecting somatotopic organization of the face-associated motor cortex.

Motor Evoked Potentials from the Bladder on Magnetic Stimulation of the Cauda Equina: A New Technique for Investigation of Autonomic Bladder Innervation

1992 ◽  
Vol 147 (3 Part 1) ◽  
pp. 658-661 ◽  
Author(s):  
Bart L.H. Bemelmans ◽  
Philip E.V. Van Kerrebroeck ◽  
Servaas L.H. Notermans ◽  
Hessel Wijkstra ◽  
Frans M.J. Debruyne
Keyword(s):  
Evoked Potentials ◽  
Magnetic Stimulation ◽  
Motor Evoked Potentials ◽  
Cauda Equina ◽  
New Technique ◽  
A New Technique ◽  
Stimulation Of

Paraspinal motor evoked potentials by magnetic stimulation of the motor cortex

Neurology ◽  
2000 ◽  
Vol 55 (6) ◽  
pp. 885-888 ◽  
Author(s):  
T. Hashimoto ◽  
T. Uozumi ◽  
S. Tsuji
Keyword(s):  
Motor Cortex ◽  
Evoked Potentials ◽  
Magnetic Stimulation ◽  
Motor Evoked Potentials ◽  
Stimulation Of
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