Effects of Coil Orientation on Motor Evoked Potentials From Orbicularis Oris
This study aimed to characterize effects of coil orientation on the size of Motor Evoked Potentials (MEPs) from both sides of Orbicularis Oris (OO) and both First Dorsal Interosseous (FDI) muscles, following stimulation to left lip and left hand Primary Motor Cortex. Using a 70 mm figure-of-eight co...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2018-11-01
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| Series: | Frontiers in Neuroscience |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fnins.2018.00683/full |
| _version_ | 1811194752216858624 |
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| author | Patti Adank Dan Kennedy-Higgins Gwijde Maegherman Ricci Hannah Helen E. Nuttall Helen E. Nuttall |
| author_facet | Patti Adank Dan Kennedy-Higgins Gwijde Maegherman Ricci Hannah Helen E. Nuttall Helen E. Nuttall |
| author_sort | Patti Adank |
| collection | DOAJ |
| description | This study aimed to characterize effects of coil orientation on the size of Motor Evoked Potentials (MEPs) from both sides of Orbicularis Oris (OO) and both First Dorsal Interosseous (FDI) muscles, following stimulation to left lip and left hand Primary Motor Cortex. Using a 70 mm figure-of-eight coil, we collected MEPs from eight different orientations while recording from contralateral and ipsilateral OO and FDI using a monophasic pulse delivered at 120% active motor threshold. MEPs from OO were evoked consistently for six orientations for contralateral and ipsilateral sites. Contralateral orientations 0°, 45°, 90°, and 315° were found to best elicit OO MEPs with a likely cortical origin. The largest FDI MEPs were recorded for contralateral 45°, invoking a posterior–anterior (PA) current flow. Orientations traditionally used for FDI were also found to be suitable for eliciting OO MEPs. Individuals vary more in their optimal orientation for OO than for FDI. It is recommended that researchers iteratively probe several orientations when eliciting MEPs from OO. Several orientations likely induced direct activation of facial muscles. |
| first_indexed | 2024-04-12T00:32:52Z |
| format | Article |
| id | doaj.art-3029695a2bb5438ea4f8386b6132379f |
| institution | Directory Open Access Journal |
| issn | 1662-453X |
| language | English |
| last_indexed | 2024-04-12T00:32:52Z |
| publishDate | 2018-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neuroscience |
| spelling | doaj.art-3029695a2bb5438ea4f8386b6132379f2022-12-22T03:55:17ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2018-11-011210.3389/fnins.2018.00683380650Effects of Coil Orientation on Motor Evoked Potentials From Orbicularis OrisPatti Adank0Dan Kennedy-Higgins1Gwijde Maegherman2Ricci Hannah3Helen E. Nuttall4Helen E. Nuttall5Department of Speech, Hearing and Phonetic Sciences, University College London, London, United KingdomDepartment of Speech, Hearing and Phonetic Sciences, University College London, London, United KingdomDepartment of Speech, Hearing and Phonetic Sciences, University College London, London, United KingdomSobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, University College London, London, United KingdomDepartment of Speech, Hearing and Phonetic Sciences, University College London, London, United KingdomDepartment of Psychology, Lancaster University, Lancaster, United KingdomThis study aimed to characterize effects of coil orientation on the size of Motor Evoked Potentials (MEPs) from both sides of Orbicularis Oris (OO) and both First Dorsal Interosseous (FDI) muscles, following stimulation to left lip and left hand Primary Motor Cortex. Using a 70 mm figure-of-eight coil, we collected MEPs from eight different orientations while recording from contralateral and ipsilateral OO and FDI using a monophasic pulse delivered at 120% active motor threshold. MEPs from OO were evoked consistently for six orientations for contralateral and ipsilateral sites. Contralateral orientations 0°, 45°, 90°, and 315° were found to best elicit OO MEPs with a likely cortical origin. The largest FDI MEPs were recorded for contralateral 45°, invoking a posterior–anterior (PA) current flow. Orientations traditionally used for FDI were also found to be suitable for eliciting OO MEPs. Individuals vary more in their optimal orientation for OO than for FDI. It is recommended that researchers iteratively probe several orientations when eliciting MEPs from OO. Several orientations likely induced direct activation of facial muscles.https://www.frontiersin.org/article/10.3389/fnins.2018.00683/fulltranscranial magnetic stimulationmotor cortexfacial musclehand musclemotor evoked potentialscoil orientation |
| spellingShingle | Patti Adank Dan Kennedy-Higgins Gwijde Maegherman Ricci Hannah Helen E. Nuttall Helen E. Nuttall Effects of Coil Orientation on Motor Evoked Potentials From Orbicularis Oris Frontiers in Neuroscience transcranial magnetic stimulation motor cortex facial muscle hand muscle motor evoked potentials coil orientation |
| title | Effects of Coil Orientation on Motor Evoked Potentials From Orbicularis Oris |
| title_full | Effects of Coil Orientation on Motor Evoked Potentials From Orbicularis Oris |
| title_fullStr | Effects of Coil Orientation on Motor Evoked Potentials From Orbicularis Oris |
| title_full_unstemmed | Effects of Coil Orientation on Motor Evoked Potentials From Orbicularis Oris |
| title_short | Effects of Coil Orientation on Motor Evoked Potentials From Orbicularis Oris |
| title_sort | effects of coil orientation on motor evoked potentials from orbicularis oris |
| topic | transcranial magnetic stimulation motor cortex facial muscle hand muscle motor evoked potentials coil orientation |
| url | https://www.frontiersin.org/article/10.3389/fnins.2018.00683/full |
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