Erik Stålberg1, Donald B Sanders2, Sajjad Ali3, Gerald Cooray4,5, Lea Leonardis6, Sissel Löseth7,8, Flavia Machado9,10, Antonio Maldonado11,12, Carmen Martinez-Aparicio13,14, Arne Sandberg1, Benn Smith15, Johan Widenfalk1,16, João Aris Kouyoumdjian17. 1. Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Uppsala, Sweden. 2. Department of Neurology, Duke University Medical Center, Durham, North Carolina, USA. 3. Department of Clinical Neurophysiology, Queen Elizabeth Hospital Birmingham, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK. 4. Clinical Neurophysiology, Karolinska University Hospital, Stockholm, Sweden. 5. The Wellcome Trust for Neuroimaging, University College of London, London, UK. 6. Institute of Clinical Neurophysiology, University Medical Center Ljubljana, Ljubljana, Slovenia. 7. Department of Clinical Medicine, The Artic University of Norway, Tromsø, Norway. 8. Department of Clinical Neurophysiology, University Hospital of North Norway, Tromsø, Norway. 9. Department of Neurology and Neurosurgery, Medical School, Universidade de São Paulo, São Paulo, Brazil. 10. Fleury Medicina e Saúde, São Paulo, Brazil. 11. San Rafael University Hospital, Granada, Spain. 12. Department of Clinical Neurophysiology, Ibermutuamur, Granada, Spain. 13. Department of Clinical Neurophysiology, Vithas Virgen del Mar Hospital, Almeria, Spain. 14. Doctoral Program in Clinical Medicine and Public Health, University of Granada, Granada, Spain. 15. Department of Neurology, Mayo Clinic College of Medicine, Scottsdale Arizona, USA. 16. Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden. 17. Neuromuscular Investigation Laboratory, Faculdade Medicina São José do Rio Preto, São Paulo, Brazil.
Abstract
INTRODUCTION: The aim of this study was to create reference values for jitter measured with concentric needle electrodes. METHODS: Operators worldwide contributed recordings from orbicularis oculi (OO), frontalis (FR), and extensor digitorum (ED) muscles in healthy controls. Criteria for acceptable signal quality were agreed upon in advance. Fifteen or 20 recordings of acceptable quality from each muscle were required for voluntary and electrical stimulation recordings, respectively. RESULTS: Recordings from 59 to 92 subjects were obtained for each muscle and activation type. Outlier limits for mean consecutive difference and individual jitter data for voluntary activation were: OO, 31 and 45 µs; FR, 28 and 38 µs; ED, 30 and 43 µs; and for electrical stimulation they were: OO, 27 and 36 µs; FR, 21 and 28 µs; ED, 24 and 35 µs. CONCLUSION: Reference jitter values from concentric needle electrode recordings were developed from signals of defined quality while seeking to avoid creating supernormal values.
INTRODUCTION: The aim of this study was to create reference values for jitter measured with concentric needle electrodes. METHODS: Operators worldwide contributed recordings from orbicularis oculi (OO), frontalis (FR), and extensor digitorum (ED) muscles in healthy controls. Criteria for acceptable signal quality were agreed upon in advance. Fifteen or 20 recordings of acceptable quality from each muscle were required for voluntary and electrical stimulation recordings, respectively. RESULTS: Recordings from 59 to 92 subjects were obtained for each muscle and activation type. Outlier limits for mean consecutive difference and individual jitter data for voluntary activation were: OO, 31 and 45 µs; FR, 28 and 38 µs; ED, 30 and 43 µs; and for electrical stimulation they were: OO, 27 and 36 µs; FR, 21 and 28 µs; ED, 24 and 35 µs. CONCLUSION: Reference jitter values from concentric needle electrode recordings were developed from signals of defined quality while seeking to avoid creating supernormal values.
Authors: Eric A Kirk; Kevin J Gilmore; Daniel W Stashuk; Timothy J Doherty; Charles L Rice Journal: J Neurophysiol Date: 2019-06-26 Impact factor: 2.714
Authors: Hava Özlem Dede; Nermin Görkem Şırın; Elif Kocasoy-Orhan; Halil Atilla Idrısoğlu; Mehmet Barış Baslo Journal: Noro Psikiyatr Ars Date: 2019-08-16 Impact factor: 1.339