Coherence analysis in the myoclonus of corticobasal degeneration
Identifieur interne : 004149 ( Main/Exploration ); précédent : 004148; suivant : 004150Coherence analysis in the myoclonus of corticobasal degeneration
Auteurs : Pascal Grosse [Royaume-Uni, Allemagne] ; Andrea Kühn [Royaume-Uni, Allemagne] ; Carla Cordivari [Royaume-Uni] ; Peter Brown [Royaume-Uni]Source :
- Movement Disorders [ 0885-3185 ] ; 2003-11.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
- KwdEn :
- Aged, Basal Ganglia (physiopathology), Basal ganglion, Coherence, Degeneration, Electroencephalography, Electromyography, Exploration, Female, Human, Humans, Middle Aged, Motor Cortex (physiopathology), Muscle, Skeletal (physiopathology), Myoclonus, Myoclonus (diagnosis), Myoclonus (physiopathology), Nerve Degeneration (diagnosis), Nerve Degeneration (physiopathology), corticobasal degeneration, myoclonus, reference analysis.
- MESH :
- diagnosis : Myoclonus, Nerve Degeneration.
- physiopathology : Basal Ganglia, Motor Cortex, Muscle, Skeletal, Myoclonus, Nerve Degeneration.
- Aged, Electroencephalography, Electromyography, Female, Humans, Middle Aged.
Abstract
We investigated whether myoclonus in corticobasal degeneration (CBD) is cortical or subcortical in origin. Many authors have suggested that the myoclonus in CBD is a subtype of cortical myoclonus, despite the fact that back‐averaging fails to detect a cortical correlate to spontaneous or action induced jerks and giant sensory evoked potentials are seldom found. Electroencephalographic–electromyographic (EEG–EMG) and EMG–EMG frequency analysis may be more sensitive to cortical drives when EMG bursts occur at a high frequency and at low amplitudes as in CBD. We evaluated EEG–EMG and EMG–EMG coherence and phase in 5 patients with clinically probable CBD and unilateral, action‐induced and stimulus‐sensitive myoclonus. We found negligible corticomuscular coherence despite a dramatically exaggerated EMG–EMG coherence. We conclude that an inflated EMG–EMG coherence is found in some patients with CBD and that this is unlikely to be due to an exaggerated cortical drive. © 2003 Movement Disorder Society
Url:
DOI: 10.1002/mds.10535
Affiliations:
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Many authors have suggested that the myoclonus in CBD is a subtype of cortical myoclonus, despite the fact that back‐averaging fails to detect a cortical correlate to spontaneous or action induced jerks and giant sensory evoked potentials are seldom found. Electroencephalographic–electromyographic (EEG–EMG) and EMG–EMG frequency analysis may be more sensitive to cortical drives when EMG bursts occur at a high frequency and at low amplitudes as in CBD. We evaluated EEG–EMG and EMG–EMG coherence and phase in 5 patients with clinically probable CBD and unilateral, action‐induced and stimulus‐sensitive myoclonus. We found negligible corticomuscular coherence despite a dramatically exaggerated EMG–EMG coherence. We conclude that an inflated EMG–EMG coherence is found in some patients with CBD and that this is unlikely to be due to an exaggerated cortical drive. © 2003 Movement Disorder Society</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Berlin</li><li>Grand Londres</li></region><settlement><li>Berlin</li><li>Londres</li></settlement></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Grosse, Pascal" sort="Grosse, Pascal" uniqKey="Grosse P" first="Pascal" last="Grosse">Pascal Grosse</name></region><name sortKey="Brown, Peter" sort="Brown, Peter" uniqKey="Brown P" first="Peter" last="Brown">Peter Brown</name><name sortKey="Cordivari, Carla" sort="Cordivari, Carla" uniqKey="Cordivari C" first="Carla" last="Cordivari">Carla Cordivari</name><name sortKey="Kuhn, Andrea" sort="Kuhn, Andrea" uniqKey="Kuhn A" first="Andrea" last="Kühn">Andrea Kühn</name></country><country name="Allemagne"><region name="Berlin"><name sortKey="Grosse, Pascal" sort="Grosse, Pascal" uniqKey="Grosse P" first="Pascal" last="Grosse">Pascal Grosse</name></region><name sortKey="Kuhn, Andrea" sort="Kuhn, Andrea" uniqKey="Kuhn A" first="Andrea" last="Kühn">Andrea Kühn</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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