Publication

Effects of co-activation on cortical organization and discrimination performance

Pilz, K., Veit, R., Braun, C. & Godde, B., 3-Dec-2004, In : Neuroreport. 15, 17, p. 2669-2672 4 p.

Research output: Contribution to journalArticleAcademicpeer-review

We used fMRI to investigate the effects of tactile co-activation on the topographic organization of the human primary somatosensory cortex (SI). Behavioral consequences of co-activation were studied in a psychophysical task assessing the mislocalization of tactile stimuli. Co-activation was applied to the index, middle and ring fingers of the right hand either synchronously or asynchronously. Cortical representations for synchronously co-activated fingers moved closer together, whereas cortical representations for asynchronously co-activated fingers became segregated. Behaviorally, this pattern coincided with an increased and reduced number of mislocalizations between synchronously and asynchronously co-activated fingers, respectively. Thus, both synchronous and asynchronous coupling of passive tactile stimulation is able to induce short-term cortical reorganization associated with functionally relevant changes.

Original languageEnglish
Pages (from-to)2669-2672
Number of pages4
JournalNeuroreport
Volume15
Issue number17
Publication statusPublished - 3-Dec-2004
Externally publishedYes

    Keywords

  • cortical organization, fMRI, psychophysics, somatosensory cortex, synchronous and asynchronous co-activation, EXPERIENCE-DEPENDENT PLASTICITY, HUMAN SOMATOSENSORY CORTEX, RAT BARREL CORTEX, TACTILE COACTIVATION, REPRESENTATIONS, HAND, MISLOCALIZATIONS, REORGANIZATION, STIMULATION, IMPROVEMENT

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