Abnormal Sequencing of Motor Actions in ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Abnormal Sequencing of Motor Actions in Patients With Schizophrenia: Evidence From Grip Force Adjustments During Object Manipulation
Author(s) :
Delevoye, Yvonne [Auteur correspondant]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Giersch, Anne [Auteur]
Université de Strasbourg [UNISTRA]
Danion, Jean-Marie [Auteur]

Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Giersch, Anne [Auteur]
Université de Strasbourg [UNISTRA]
Danion, Jean-Marie [Auteur]
Journal title :
American Journal of Psychiatry
Abbreviated title :
AJP
Volume number :
160
Pages :
134-141
Publisher :
American Psychiatric Association Publishing
Publication date :
2003-01
HAL domain(s) :
Sciences cognitives
English abstract : [en]
During object manipulation, grip force must be adjusted in anticipation of destabilizing load forces to prevent the object from slipping. This study used three gripping tasks to assess whether schizophrenia affects the ...
Show more >During object manipulation, grip force must be adjusted in anticipation of destabilizing load forces to prevent the object from slipping. This study used three gripping tasks to assess whether schizophrenia affects the predictive mechanisms required for the scaling, timing, and/or sequencing of motor actions. Sixteen patients with schizophrenia and 16 comparison subjects matched for age, sex, and educational level 1) lifted objects of various mass and texture (lift task) and 2) used a manipulandum to hit (hit task) or resist (resist task) impacts produced by a collision with a pendulum. For an optimized performance, all tasks demanded a predictive increase in grip force and the timing of external events. The fluid sequencing of finger and hand submovements was required for the lift and the hit tasks but not for the resist task. Patients were impaired in the smooth execution of both the lift and the hit tasks but not in the performance of the resist task. In all three tasks, the scaling of grip force was similar for patients and comparison subjects. Schizophrenia is associated with a specific deficit in the sequencing of motor actions rather than with an overall problem in the predictive control of movement.Show less >
Show more >During object manipulation, grip force must be adjusted in anticipation of destabilizing load forces to prevent the object from slipping. This study used three gripping tasks to assess whether schizophrenia affects the predictive mechanisms required for the scaling, timing, and/or sequencing of motor actions. Sixteen patients with schizophrenia and 16 comparison subjects matched for age, sex, and educational level 1) lifted objects of various mass and texture (lift task) and 2) used a manipulandum to hit (hit task) or resist (resist task) impacts produced by a collision with a pendulum. For an optimized performance, all tasks demanded a predictive increase in grip force and the timing of external events. The fluid sequencing of finger and hand submovements was required for the lift and the hit tasks but not for the resist task. Patients were impaired in the smooth execution of both the lift and the hit tasks but not in the performance of the resist task. In all three tasks, the scaling of grip force was similar for patients and comparison subjects. Schizophrenia is associated with a specific deficit in the sequencing of motor actions rather than with an overall problem in the predictive control of movement.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Administrative institution(s) :
Université de Lille
CNRS
CHU Lille
CNRS
CHU Lille
Collections :
Submission date :
2022-01-06T13:50:11Z
2022-01-19T09:59:19Z
2022-01-19T10:09:48Z
2022-01-19T09:59:19Z
2022-01-19T10:09:48Z
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