Cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalography
Abstract We investigated the usefulness of cortico-force coherence (CFC) between electroencephalography (EEG) and force signals for assessing sensorimotor cortex function. Fourteen healthy participants performed slight rhythmical pressing with the right finger and right toe at a self-paced rate of 1...
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Nature Portfolio
2025-04-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-95759-4 |
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| author | Hitoshi Maezawa Masanori Wakida Masao Matsuhashi |
| author_facet | Hitoshi Maezawa Masanori Wakida Masao Matsuhashi |
| author_sort | Hitoshi Maezawa |
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| description | Abstract We investigated the usefulness of cortico-force coherence (CFC) between electroencephalography (EEG) and force signals for assessing sensorimotor cortex function. Fourteen healthy participants performed slight rhythmical pressing with the right finger and right toe at a self-paced rate of 1–3 Hz under the active condition of CFC using a force sensor and electromyography (EMG). For passive CFC, the experimenter pressed the participant’s right finger at a rate similar to that in the active condition. As control, the conventional corticokinematic coherence (CKC) was recorded for the right finger using an accelerometer (ACC). We also recorded CFC in the active condition by pressing the right toe. In all participants, coherence spectra between the 32-channel EEG signals and force, ACC, and EMG signals showed significant peaks (P < 0.01) at the movement frequency peaks or their harmonics. Finger CFC peak value did not differ among the three conditions (active CFC, passive CFC, and CKC). Finger CFC, force sensor, and EMG values showed no differences. Additionally, finger CFC did not significantly differ from toe CFC. The CFC approach with EEG appears promising and useful for the functional assessment of the sensorimotor cortex, with a clinical advantage of conducting measurements using less force and without obvious kinematics. |
| format | Article |
| id | doaj-art-c47b0ffeb13444f488ba5f6dfd043b77 |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
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| spelling | doaj-art-c47b0ffeb13444f488ba5f6dfd043b772025-08-20T03:10:12ZengNature PortfolioScientific Reports2045-23222025-04-0115111210.1038/s41598-025-95759-4Cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalographyHitoshi Maezawa0Masanori Wakida1Masao Matsuhashi2Faculty of Rehabilitation, Kansai Medical UniversityFaculty of Rehabilitation, Kansai Medical UniversityDepartment of Epilepsy, Movement Disorders and Physiology, Graduate School of Medicine, Kyoto UniversityAbstract We investigated the usefulness of cortico-force coherence (CFC) between electroencephalography (EEG) and force signals for assessing sensorimotor cortex function. Fourteen healthy participants performed slight rhythmical pressing with the right finger and right toe at a self-paced rate of 1–3 Hz under the active condition of CFC using a force sensor and electromyography (EMG). For passive CFC, the experimenter pressed the participant’s right finger at a rate similar to that in the active condition. As control, the conventional corticokinematic coherence (CKC) was recorded for the right finger using an accelerometer (ACC). We also recorded CFC in the active condition by pressing the right toe. In all participants, coherence spectra between the 32-channel EEG signals and force, ACC, and EMG signals showed significant peaks (P < 0.01) at the movement frequency peaks or their harmonics. Finger CFC peak value did not differ among the three conditions (active CFC, passive CFC, and CKC). Finger CFC, force sensor, and EMG values showed no differences. Additionally, finger CFC did not significantly differ from toe CFC. The CFC approach with EEG appears promising and useful for the functional assessment of the sensorimotor cortex, with a clinical advantage of conducting measurements using less force and without obvious kinematics.https://doi.org/10.1038/s41598-025-95759-4ElectroencephalographyVoluntary movementCorticokinematic coherenceMotor-evoked fieldsPrimary sensorimotor cortexSophisticated movements |
| spellingShingle | Hitoshi Maezawa Masanori Wakida Masao Matsuhashi Cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalography Scientific Reports Electroencephalography Voluntary movement Corticokinematic coherence Motor-evoked fields Primary sensorimotor cortex Sophisticated movements |
| title | Cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalography |
| title_full | Cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalography |
| title_fullStr | Cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalography |
| title_full_unstemmed | Cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalography |
| title_short | Cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalography |
| title_sort | cortico force coherence of the finger and toe with slight rhythmic pressure on force sensors using electroencephalography |
| topic | Electroencephalography Voluntary movement Corticokinematic coherence Motor-evoked fields Primary sensorimotor cortex Sophisticated movements |
| url | https://doi.org/10.1038/s41598-025-95759-4 |
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