Differential Activation in Somatosensory Cortex for Different Discrimination Tasks

Braun, Christoph; Schweizer, Renate; Elbert, Thomas; Birbaumer, Niels; Taub, Edward

Differential Activation in Somatosensory Cortex for Different Discrimination Tasks

Dateien

Braun_etal_JNeurosc.pdfGröße: 293.1 KBDownloads: 704

Datum

2000

Autor:innen

Braun, Christoph

Schweizer, Renate

Elbert, Thomas

Birbaumer, Niels

Taub, Edward

URI (zitierfähiger Link)

http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-21676

Link zur Lizenz

Urheberrechtlich geschützt

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Psychologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Neuroscience. 2000, 20(1), pp. 446-450. ISSN 0270-6474. eISSN 1529-2401

Zusammenfassung

Maps of the body surface in somatosensory cortex have been shown to be highly plastic, altering their configuration in response to changes in use of body parts. The current study investigated alterations in the functional organization of the human somatosensory cortex resulting from massed practice. Over a period of 4 weeks, subjects were given synchronous tactile stimulation of thumb (D1) and little finger (D5) for 1 hr/d. They had to identify the orientation of the stimuli. Neuroelectric source localization based on high-resolution EEG revealed that, when subjects received passive tactile stimulation of D1 or D5, the representations of the fingers in primary somatosensory cortex were closer together after training than before. There was also an apparently correlative tendency to anomalously mislocalize near-threshold tactile stimuli equally to the distant finger costimulated during training rather than preferentially to the finger nearest to the finger stimulated in a post-training test. However, when the stimulus discrimination had to be made, neuroelectric source imaging revealed that the digital representations of D1 and D5 were further apart after training than before. Thus, the same series of prolonged repetitive stimulations produced two different opposite effects on the spatial relationship of the cortical representations of the digits, suggesting that differential activation in the same region of somatosensory cortex is specific to different tasks.

Fachgebiet (DDC)

150 Psychologie

Schlagwörter

cortical reorganization, plasticity, learning, somatosensory evoked potentials, dipole source analysis, tactile sensation threshold, human

Zitieren

ISO 690

BRAUN, Christoph, Renate SCHWEIZER, Thomas ELBERT, Niels BIRBAUMER, Edward TAUB, 2000. Differential Activation in Somatosensory Cortex for Different Discrimination Tasks. In: Journal of Neuroscience. 2000, 20(1), pp. 446-450. ISSN 0270-6474. eISSN 1529-2401

BibTex

@article{Braun2000Diffe-11161,
  year={2000},
  title={Differential Activation in Somatosensory Cortex for Different Discrimination Tasks},
  number={1},
  volume={20},
  issn={0270-6474},
  journal={Journal of Neuroscience},
  pages={446--450},
  author={Braun, Christoph and Schweizer, Renate and Elbert, Thomas and Birbaumer, Niels and Taub, Edward}
}

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