Abstract
During dynamic voluntary movements, power in the α- and β-bands resulting from synchronized neuronal activity is modulated in a manner that is time-locked to movement onset. These signals can be readily recorded from the scalp surface using electroencephalography. Abnormalities in the magnitude and timing of these oscillations are present in a wide variety of movement disorders including Parkinson's disease and dystonia. Most studies have examined movement-related oscillations in the context of single discrete movements, yet marked impairments are often seen during the performance of repetitive movements. For this reason, there is considerable need for analysis methods that can resolve the modulation of these oscillations in both the frequency and time domains. Presently, there is little consensus on which is the most appropriate method for this purpose. In this paper, a comparison of commonly used time-frequency methods is presented for the analysis of movement-related power in the α- and β-bands during repetitive movements. The same principles hold, however, for any form of repetitive or rhythmic input-output processes in the brain. In particular, methods based on band-pass filtering, the short-time Fourier transform (STFT), continuous wavelet transform and reduced interference distributions are discussed. The relative merits and limitations in terms of spectral or temporal resolution of each method are shown with the use of simulated and experimental data. It is shown that the STFT provides the best compromise between spectral and temporal resolution and thus is the most appropriate approach for the analysis and interpretation of repetitive movement-related oscillations in health and disease.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 107-115 |
| Number of pages | 9 |
| Journal | Journal of Neuroscience Methods |
| Volume | 186 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 30 2010 |
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Keywords
- EEG
- Event-related de-synchronisation
- Reduced interference distributions
- Repetitive movements
- Short-time Fourier Transform
- Time-frequency analysis
- Wavelets
Cite this
Time-frequency analysis of movement-related spectral power in EEG during repetitive movements : A comparison of methods. / Allen, David P.; MacKinnon, Colum.
In: Journal of Neuroscience Methods, Vol. 186, No. 1, 30.01.2010, p. 107-115.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Time-frequency analysis of movement-related spectral power in EEG during repetitive movements
T2 - A comparison of methods
AU - Allen, David P.
AU - MacKinnon, Colum
PY - 2010/1/30
Y1 - 2010/1/30
N2 - During dynamic voluntary movements, power in the α- and β-bands resulting from synchronized neuronal activity is modulated in a manner that is time-locked to movement onset. These signals can be readily recorded from the scalp surface using electroencephalography. Abnormalities in the magnitude and timing of these oscillations are present in a wide variety of movement disorders including Parkinson's disease and dystonia. Most studies have examined movement-related oscillations in the context of single discrete movements, yet marked impairments are often seen during the performance of repetitive movements. For this reason, there is considerable need for analysis methods that can resolve the modulation of these oscillations in both the frequency and time domains. Presently, there is little consensus on which is the most appropriate method for this purpose. In this paper, a comparison of commonly used time-frequency methods is presented for the analysis of movement-related power in the α- and β-bands during repetitive movements. The same principles hold, however, for any form of repetitive or rhythmic input-output processes in the brain. In particular, methods based on band-pass filtering, the short-time Fourier transform (STFT), continuous wavelet transform and reduced interference distributions are discussed. The relative merits and limitations in terms of spectral or temporal resolution of each method are shown with the use of simulated and experimental data. It is shown that the STFT provides the best compromise between spectral and temporal resolution and thus is the most appropriate approach for the analysis and interpretation of repetitive movement-related oscillations in health and disease.
AB - During dynamic voluntary movements, power in the α- and β-bands resulting from synchronized neuronal activity is modulated in a manner that is time-locked to movement onset. These signals can be readily recorded from the scalp surface using electroencephalography. Abnormalities in the magnitude and timing of these oscillations are present in a wide variety of movement disorders including Parkinson's disease and dystonia. Most studies have examined movement-related oscillations in the context of single discrete movements, yet marked impairments are often seen during the performance of repetitive movements. For this reason, there is considerable need for analysis methods that can resolve the modulation of these oscillations in both the frequency and time domains. Presently, there is little consensus on which is the most appropriate method for this purpose. In this paper, a comparison of commonly used time-frequency methods is presented for the analysis of movement-related power in the α- and β-bands during repetitive movements. The same principles hold, however, for any form of repetitive or rhythmic input-output processes in the brain. In particular, methods based on band-pass filtering, the short-time Fourier transform (STFT), continuous wavelet transform and reduced interference distributions are discussed. The relative merits and limitations in terms of spectral or temporal resolution of each method are shown with the use of simulated and experimental data. It is shown that the STFT provides the best compromise between spectral and temporal resolution and thus is the most appropriate approach for the analysis and interpretation of repetitive movement-related oscillations in health and disease.
KW - EEG
KW - Event-related de-synchronisation
KW - Reduced interference distributions
KW - Repetitive movements
KW - Short-time Fourier Transform
KW - Time-frequency analysis
KW - Wavelets
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UR - http://www.scopus.com/inward/citedby.url?scp=72449204263&partnerID=8YFLogxK
U2 - 10.1016/j.jneumeth.2009.10.022
DO - 10.1016/j.jneumeth.2009.10.022
M3 - Article
C2 - 19909774
AN - SCOPUS:72449204263
VL - 186
SP - 107
EP - 115
JO - Journal of Neuroscience Methods
JF - Journal of Neuroscience Methods
SN - 0165-0270
IS - 1
ER -