Naslov
Representation of cricothyroid muscles at the primary motor cortex (M1) in healthy subjects, using navigated transcranial magnetic stimulation.

Autori
Jorba, Alba L ; Deletis, Vedran ; Espadaler, Josep M ; Rogic, Maja ; Quijada, Cesar ; Conesa Gerardo

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the 14 European Congress of Clinical Neurophysiology and the 4 International Conference on Transcranial Magnetic and Direct Current Stimulation.Clinical Neurophysiology, Volume 122, Supplement 1, Pages i-viii, S1-S214 (June 2011) / - Lahti : Elsevier, 2011, S186-S186

Skup
14th European Congress of Clinical Neurophysiology and the 4th International Conference on Transcranial Magnetic and Direct Current Stimulation

Mjesto i datum
Rim, Italija, 21.06.2011. - 25.06.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Mapping primary motor cortex; TMS

Sažetak
Introduction: Electrical stimulation studies of mapping the human motor cortex showed that vocalization was elicited from rather wide part of primary motor cortex, lateral to the localization for the face and lip muscles. Vocalization like sounds elicited by Penfield during 50-60 Hz stimulation represents tonic activation of laryngeal-pharyngeal and facial muscles. This phenomenon is not identical as simple and isolated contraction of laryngeal muscle. Methodology used in our study is eliciting corticobulbar motor evoked potentials (CoMEPs) from cricothyroid (CTHY) muscles. Objectives: To establish a methodology for mapping of primary motor cortex for cricothyroid muscles in a healthy subjects using navigated transcranial magnetic stimulator (nTMS) combined with a 3D MRI images. Method: Ten healthy subjects were included in this study. The nTMS was used for stimulation of primary motor cortex (M1) representation for abductor pollicis brevis (APB) and CTHY muscles, with recordings of motor evoked potentials (MEPs) from APB and CoMEPs from CTHY muscles. For recording CoMEPs from CTHY muscle, two hook wire electrodes were inserted in the muscle, while surface electrodes were used for recording of MEPs from APB. The location of the stimulating points over M1 for CTHY and APB muscles was determined and superimposed over MRI images, while measure their distance. Results: Cortical location for CTHY and APB muscles was successfully performed in all subjects. Stimulation over the left M1 for the CTHY muscles elicits CoMEPs in the right CTHY muscle with a mean latency of 11.5±0.6 ms. Stimulation over the left M1 for APB muscles elicits MEPs in the right APB muscle with a mean latency of 22.8±0.4 ms. Measurement of distance between cortical representation for APB and CTHY was 26 ±2.16 mm. Conclusion: This is a first study with the aim to determine the cortical location of CTHY muscle with nTMS, showing that M1 for CTHY muscle is about 3 cm more lateral than M1 for APB muscle.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne medicinske znanosti, Kliničke medicinske znanosti

POVEZANOST RADA