Abstract
| Language | English |
|---|---|
| Title of host publication | Peripheral and Spinal Mechanisms in the Neural Control of Movement |
| Editors | M.D. Binder |
| Place of Publication | Amsterdam |
| Chapter | 40 |
| Pages | 437-444 |
| Number of pages | 8 |
| DOIs | |
| Publication status | Published - 17 Dec 1999 |
Publication series
| Name | Progress in Brain Research |
|---|---|
| Publisher | Elsevier |
| Volume | 123 |
| ISSN (Print) | 0079-6123 |
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Keywords
- tremor signal
- localized cortical activity
- Parkinson's disease
Cite this
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Rhythmic cortical activity and its relation to the neurogenic components of normal and pathological tremors. / Conway, B.A.; Halliday, D.M.; Rosenberg, J.R.
Peripheral and Spinal Mechanisms in the Neural Control of Movement. ed. / M.D. Binder. Amsterdam, 1999. p. 437-444 (Progress in Brain Research; Vol. 123).Research output: Chapter in Book/Report/Conference proceeding › Chapter
TY - CHAP
T1 - Rhythmic cortical activity and its relation to the neurogenic components of normal and pathological tremors
AU - Conway, B.A.
AU - Halliday, D.M.
AU - Rosenberg, J.R.
PY - 1999/12/17
Y1 - 1999/12/17
N2 - The work of Stiles and Randall and that of Elble and Randall established that the spectrum of a tremor signal consists of two components: an inertial load dependent component and a neurogenic component. The former is a property of the structure exhibiting the tremor and shifts toward lower frequencies with increased inertial loading. The neurogenic component is load independent and was first attributed to central descending processes in the frequency range 8–12 Hz. During a maintained postural task, an additional 15–30-Hz neurogenic component of tremor was identified and associated with motor unit synchronization. Farmer et al. inferred, on the basis of indirect evidence, that the common drive to the synchronized motor units was of descending origin. Conway et al., using magnetoencephalographic (MEG) techniques, and Halliday et al., with conventional electroencephalographic (EEG) techniques, demonstrated a correlation between localized cortical activity in the 15–30-Hz frequency band and the neurogenic component of tremor associated with motor unit synchronization. These results imply that the localized rhythmic cortical activity in the 15–30-Hz frequency band that occurs during maintained postural tasks accounts for the 15–30-Hz component of neurogenic tremor, which in turn is a consequence of motor unit synchronization. The analysis of the correlation between the 15–30-Hz rhythmic cortical oscillations and the neurogenic component of tremor is equivalent to an investigation of the descending drive that synchronizes motor units during maintained postural tasks. The application of spectral and coherence analyses therefore provides a powerful procedure for characterizing the central drive associated with rhythmic cortical activity and motor unit synchrony in normal and pathological tremors. The application of these analytical methods reveals significant differences in the correlation between cortical drive and tremor in normal subjects with that observed in the cases of essential tremor and Parkinsonian tremor.
AB - The work of Stiles and Randall and that of Elble and Randall established that the spectrum of a tremor signal consists of two components: an inertial load dependent component and a neurogenic component. The former is a property of the structure exhibiting the tremor and shifts toward lower frequencies with increased inertial loading. The neurogenic component is load independent and was first attributed to central descending processes in the frequency range 8–12 Hz. During a maintained postural task, an additional 15–30-Hz neurogenic component of tremor was identified and associated with motor unit synchronization. Farmer et al. inferred, on the basis of indirect evidence, that the common drive to the synchronized motor units was of descending origin. Conway et al., using magnetoencephalographic (MEG) techniques, and Halliday et al., with conventional electroencephalographic (EEG) techniques, demonstrated a correlation between localized cortical activity in the 15–30-Hz frequency band and the neurogenic component of tremor associated with motor unit synchronization. These results imply that the localized rhythmic cortical activity in the 15–30-Hz frequency band that occurs during maintained postural tasks accounts for the 15–30-Hz component of neurogenic tremor, which in turn is a consequence of motor unit synchronization. The analysis of the correlation between the 15–30-Hz rhythmic cortical oscillations and the neurogenic component of tremor is equivalent to an investigation of the descending drive that synchronizes motor units during maintained postural tasks. The application of spectral and coherence analyses therefore provides a powerful procedure for characterizing the central drive associated with rhythmic cortical activity and motor unit synchrony in normal and pathological tremors. The application of these analytical methods reveals significant differences in the correlation between cortical drive and tremor in normal subjects with that observed in the cases of essential tremor and Parkinsonian tremor.
KW - tremor signal
KW - localized cortical activity
KW - Parkinson's disease
UR - http://www.scopus.com/inward/record.url?scp=0033371288&partnerID=8YFLogxK
UR - https://www.sciencedirect.com/bookseries/progress-in-brain-research/vol/123/suppl/C
U2 - 10.1016/S0079-6123(08)62879-4
DO - 10.1016/S0079-6123(08)62879-4
M3 - Chapter
SN - 0444502882
SN - 9780444502889
T3 - Progress in Brain Research
SP - 437
EP - 444
BT - Peripheral and Spinal Mechanisms in the Neural Control of Movement
A2 - Binder, M.D.
CY - Amsterdam
ER -