Temporal discrimination of two passive movements in writer's cramp

Movement Disorders : Official Journal of the Movement Disorder Society
Michele TinazziJohn C Rothwell

Abstract

Although movement abnormalities are predominant symptoms of dystonia, patients also have alterations in temporal as well as spatial discrimination of cutaneous inputs. Here, we use a recently described method to test whether deficits also exist in temporal discrimination of proprioceptive inputs. Percutaneous electrical stimulation of the motor point of the first dorsal interosseous (FDI) muscle, and of the flexor carpii radialis (FCR) muscle separately, was used to produce a nonpainful contraction of the muscles that caused index finger abduction and wrist flexion, respectively. In 10 patients with writer's cramp and in 10 healthy subjects, pairs of stimuli separated by different time intervals were given and subjects were asked to report whether they perceived a single or a double index finger abduction movement or wrist flexion. The threshold value was the shortest interval at which the subjects reported two separated movements (temporal discrimination motor threshold [TDMT]). In both writer's cramp patients and controls, TDMTs were higher for FCR than for FDI. But in contrast to the reduced temporal discrimination reported for cutaneous sensation, there was no significant difference in either muscle between TDMT in patients...Continue Reading

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Citations

Nov 13, 2013·Nature Reviews. Neurology·Antonella ConteAlfredo Berardelli
Jul 23, 2014·PloS One·Michele TinazziAlfredo Berardelli
Dec 19, 2015·Cerebral Cortex·Giovanni BattistellaKristina Simonyan
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Mar 24, 2009·Movement Disorders : Official Journal of the Movement Disorder Society·Michele TinazziKailash P Bhatia
Nov 8, 2008·Annals of the New York Academy of Sciences·Diego Torres-Russotto, Joel S Perlmutter
Apr 30, 2020·Toxins·Maria Ilenia De BartoloAntonella Conte
Nov 21, 2008·Developmental Medicine and Child Neurology·Shakti K AgrawalSantosh R Mordekar
Feb 1, 2019·Nature Reviews. Neurology·Antonella ConteAlfredo Berardelli
Jul 28, 2020·Experimental Brain Research·Anna LatorreKailash P Bhatia
Aug 7, 2018·Frontiers in Neurology·Laura AvanzinoAntonella Conte
Dec 6, 2019·Frontiers in Neuroscience·Thorsten M OdorferDaniel Zeller

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