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Publication year
2002Source
Acta Psychologica, 110, 1, (2002), pp. 21-34ISSN
Publication type
Article / Letter to editor

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Organization
SW OZ BSI KLP
SW OZ DCC CO
Former Organization
SW OZ NICI CO
Journal title
Acta Psychologica
Volume
vol. 110
Issue
iss. 1
Page start
p. 21
Page end
p. 34
Subject
Experimental Psychopathology and TreatmentAbstract
Motor initiation and motor execution in four patients with conversion paralysis were investigated in a non-affected motor modality (speech). In line with the hypothesis of dissociated control in conversion disorder [Cognit. Neuropsychiatry 8 (1) (2001) 21] motor initiation, but not response duration, was expected to be impaired. The motor initiation times (reaction time: RT) and motor execution times (response duration: RD) were compared on four RT-tasks that required the production of a verbal response: a simple choice RT-task, a mental letter rotation task, and an implicit and an explicit mental hand rotation task. Because conversion disorder is expected to primarily involve an impairment in the initiation of movement, we expected the following task characteristics to uniquely affect RT and not RD: type of instruction (implicit versus explicit instructed imagery), angle of rotation, and target arm (affected versus non-affected arm). The results indeed showed the task characteristics to significantly affect the participants' RT and not their RD. It was concluded that conversion paralysis is associated with a specific impairment in the explicit initiation of processes with a spatial and motor component.
This item appears in the following Collection(s)
- Academic publications [202563]
- Electronic publications [100732]
- Faculty of Social Sciences [27083]
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