Impaired Tactile Performance in Patients with Hand Immobilization

Ragert, P.; Pleger, B.; Voelker, Birgit; Maier, C.; Schwenkreis, Peter; Foerster, Angelika; Nicolas, V.; Tegenthoff, Martin; Dinse, Hubert R.

doi:10.1055/s-2004-832130

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2007

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“…Generally speaking, the size of a cortical representation is positively correlated with the quality of performance of a specific task. The opposite effect has been shown for extreme forms of disuse, including immobilization or amputation of body parts, which lead to shrinkage or disintegration of cortical representations [9,10]. …”

Section: Introductionmentioning

confidence: 99%

Differential effects of synchronous and asynchronous multifinger coactivation on human tactile performance

2007

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Background: Repeated execution of a tactile task enhances task performance. In the present study we sought to improve tactile performance with unattended activation-based learning processes (i.e., focused stimulation of dermal receptors evoking neural coactivation (CA)). Previous studies show that the application of CA to a single finger reduced the stationary two-point discrimination threshold and significantly increased tactile acuity. These changes were accompanied by an expansion of the cortical finger representation in primary somatosensory cortex (SI). Here we investigated the effect of different types of multifinger CA on the tactile performance of each finger of the right hand.

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Section: Introductionmentioning

confidence: 99%