Effects of co-activation on cortical organization and discrimination performancePilz, K., Veit, R., Braun, C. & Godde, B., 3-Dec-2004, In : Neuroreport. 15, 17, p. 2669-2672 4 p.
Research output: Contribution to journal › Article › Academic › peer-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.
|Number of pages||4|
|Publication status||Published - 3-Dec-2004|
- 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