Antiparkinson medications improve agonist activation but not antagonist inhibition during sequential reaching movements
Identifieur interne : 001E66 ( PascalFrancis/Corpus ); précédent : 001E65; suivant : 001E67Antiparkinson medications improve agonist activation but not antagonist inhibition during sequential reaching movements
Auteurs : Valerie E. Kelly ; Amy J. BastianSource :
- Movement disorders [ 0885-3185 ] ; 2005.
Descripteurs français
- Pascal (Inist)
English descriptors
Abstract
The execution of sequential arm movements is critical to activities of daily living such as eating and grooming. It is known that movement sequences are bradykinetic in people with Parkinson's disease (PD) and that antiparkinson medications improve the speed of movement sequences. However, it is unclear how muscle activity is modulated during sequential movements and what effect antiparkinson medications have on muscle modulation. We studied subjects with PD and age- and gender-matched control subjects making sequential reaching movements. Subjects with PD were tested before and after their morning dose of antiparkinson medications (levodopa and/or dopamine agonists). We examined the effect of antiparkinson medications on the modulation ol muscle activity (i.e., the ability to activate and inhibit each muscle throughout the course of a sequence). Results showed that the group with PD, before medication, moved more slowly and modulated muscle activity poorly compared to the control group. Antiparkinson medications improved movement speed as expected, although sequential movements remained slower than normal even after medication. Medication improved the ability to activate agonist muscle activity but did not improve the ability to inhibit antagonist activity. Instead, antagonist activity was also increased, resulting in minimal improvements in muscle modulation during sequential reaching movements.
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NO : | PASCAL 05-0362495 INIST |
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ET : | Antiparkinson medications improve agonist activation but not antagonist inhibition during sequential reaching movements |
AU : | KELLY (Valerie E.); BASTIAN (Amy J.) |
AF : | Department of Rehabilitation Medicine, University of Washington/Seattle, Washington/Etats-Unis (1 aut.); Kennedy Krieger Institute and Department of Neurology, Johns Hopkins University/Baltimore, Maryland/Etats-Unis (2 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Movement disorders; ISSN 0885-3185; Etats-Unis; Da. 2005; Vol. 20; No. 6; Pp. 694-704; Bibl. 25 ref. |
LA : | Anglais |
EA : | The execution of sequential arm movements is critical to activities of daily living such as eating and grooming. It is known that movement sequences are bradykinetic in people with Parkinson's disease (PD) and that antiparkinson medications improve the speed of movement sequences. However, it is unclear how muscle activity is modulated during sequential movements and what effect antiparkinson medications have on muscle modulation. We studied subjects with PD and age- and gender-matched control subjects making sequential reaching movements. Subjects with PD were tested before and after their morning dose of antiparkinson medications (levodopa and/or dopamine agonists). We examined the effect of antiparkinson medications on the modulation ol muscle activity (i.e., the ability to activate and inhibit each muscle throughout the course of a sequence). Results showed that the group with PD, before medication, moved more slowly and modulated muscle activity poorly compared to the control group. Antiparkinson medications improved movement speed as expected, although sequential movements remained slower than normal even after medication. Medication improved the ability to activate agonist muscle activity but did not improve the ability to inhibit antagonist activity. Instead, antagonist activity was also increased, resulting in minimal improvements in muscle modulation during sequential reaching movements. |
CC : | 002B17; 002B02B10; 002B02B06 |
FD : | Système nerveux pathologie; Parkinson maladie; Chimiothérapie; Electromyographie |
FG : | Encéphale pathologie; Extrapyramidal syndrome; Maladie dégénérative; Système nerveux central pathologie; Electrophysiologie |
ED : | Nervous system diseases; Parkinson disease; Chemotherapy; Electromyography |
EG : | Cerebral disorder; Extrapyramidal syndrome; Degenerative disease; Central nervous system disease; Electrophysiology |
SD : | Sistema nervioso patología; Parkinson enfermedad; Quimioterapia; Electromiografía |
LO : | INIST-20953.354000138604660060 |
ID : | 05-0362495 |
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Pascal:05-0362495Le document en format XML
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<ET>Antiparkinson medications improve agonist activation but not antagonist inhibition during sequential reaching movements</ET>
<AU>KELLY (Valerie E.); BASTIAN (Amy J.)</AU>
<AF>Department of Rehabilitation Medicine, University of Washington/Seattle, Washington/Etats-Unis (1 aut.); Kennedy Krieger Institute and Department of Neurology, Johns Hopkins University/Baltimore, Maryland/Etats-Unis (2 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
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<LA>Anglais</LA>
<EA>The execution of sequential arm movements is critical to activities of daily living such as eating and grooming. It is known that movement sequences are bradykinetic in people with Parkinson's disease (PD) and that antiparkinson medications improve the speed of movement sequences. However, it is unclear how muscle activity is modulated during sequential movements and what effect antiparkinson medications have on muscle modulation. We studied subjects with PD and age- and gender-matched control subjects making sequential reaching movements. Subjects with PD were tested before and after their morning dose of antiparkinson medications (levodopa and/or dopamine agonists). We examined the effect of antiparkinson medications on the modulation ol muscle activity (i.e., the ability to activate and inhibit each muscle throughout the course of a sequence). Results showed that the group with PD, before medication, moved more slowly and modulated muscle activity poorly compared to the control group. Antiparkinson medications improved movement speed as expected, although sequential movements remained slower than normal even after medication. Medication improved the ability to activate agonist muscle activity but did not improve the ability to inhibit antagonist activity. Instead, antagonist activity was also increased, resulting in minimal improvements in muscle modulation during sequential reaching movements.</EA>
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