Task specific grip force control in writer's cramp.

Autor/inn/en	Schneider, Alexandra S.; Fürholzer, Waltraud; Marquardt, Christian; Hermsdörfer, Joachim
Titel	Task specific grip force control in writer's cramp. Gefälligkeitsübersetzung: Aufgabenspezifische Griffkraftsteuerung beim Schreibkrampf.
Quelle	In: Clinical neurophysiology, 125 (2014) 4, S. 786-797 PDF als Volltext Link als defekt meldenVerfügbarkeit
Sprache	englisch
Dokumenttyp	online; gedruckt; Zeitschriftenaufsatz
ISSN	0921-884X; 1388-2457; 1872-8952
DOI	10.1016/j.clinph.2013.09.043
Schlagwörter	Handlungskontrolle; Gedächtnis; Handlungsplanung; Handlungspsychologie; Handlungsregulation; Psychomotorik; Biomechanik; Gehirn; Hand; Muskelkontraktion; Bewegung (Motorische); Bewegungsapparat; Bewegungslehre; Bewegungssteuerung; Sensumotorik; Neurologie; Neurophysiologie; Neuropsychologie; Analyse; Handlungsfähigkeit
Abstract	OBJECTIVE: Writer's cramp is defined as a task specific focal dystonia generating hypertonic muscle co-contractions during handwriting resulting in impaired writing performance and exaggerated finger force. However, little is known about the generalisation of grip force across tasks others than writing. The aim of the study was to directly compare regulation of grip forces during handwriting with force regulation in other fine-motor tasks in patients and control subjects. METHODS: Handwriting, lifting and cyclic movements of a grasped object were investigated in 21 patients and 14 controls. The applied forces were registered in all three tasks and compared between groups and tasks. In addition, task-specific measures of fine-motor skill were assessed. RESULTS: As expected, patients generated exaggerated forces during handwriting compared to control subjects. However there were no statistically significant group differences during lifting and cyclic movements. The control group revealed a generalisation of grip forces across manual tasks whereas in patients there was no such correlation. CONCLUSION: We conclude that increased finger forces during handwriting are a task-specific phenomenon that does not necessarily generalise to other fine-motor tasks. SIGNIFICANCE: Force control of patients with writer's cramp in handwriting and other fine-motor tasks is characterised by individualised control strategies. Verf.-Referat.
Erfasst von	Bundesinstitut für Sportwissenschaft, Bonn
Update	2015/1