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Performance evaluation of wavelet time-resolved phase-amplitude coupling estimates on small numbers of trials |
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| รหัสดีโอไอ | |
| Creator | Sopapun Suwansawang |
| Title | Performance evaluation of wavelet time-resolved phase-amplitude coupling estimates on small numbers of trials |
| Publisher | Nakhon Pathom Rajabhat University |
| Publication Year | 2563 |
| Journal Title | Interdisciplinary Research Review |
| Journal Vol. | 15 |
| Journal No. | 1 |
| Page no. | 1 |
| Keyword | Cross-frequency, non-stationary analysis, Morse wavelet, signal processing. |
| URL Website | http://dept.npru.ac.th |
| Website title | สถาบันวิจัยและพัฒนา มหาวิทยาลัยราชภัฏนครปฐม |
| ISSN | 2697-522X |
| Abstract | Time-resolved phase-amplitude coupling (tPAC) is increasingly used in clarifying the interactions between neuronal oscillationof di erent frequencies. In this study, Airy wavelet-based method for tPAC estimates on small numbers of trials is presented.The method was validated using both synthesized and experimental data. Simulation results suggested that tPAC analysis usingmore than 15 trials o ers better joint time-frequency resolution. Experimental results showed that tPAC estimates on 30-,50-, and 100-step cycles are able to detect similar significant coupling in the time-frequency plane. Dominant couplings arebetween 6 Hz and 8-32 Hz around heel contact. These frequency components partly overlap with the frequency componentsof motor unit activity during human treadmill walking. Wavelet tPAC analysis presented in this study may be used to track timelocalised common oscillations in short segments of non-stationary neurophysiological signals with varying time and frequency resolution. |
