Brief Communication Improvement and Decline in Tactile Discrimination Behavior after Cortical Plasticity Induced by Passive Tactile Coactivation
نویسندگان
چکیده
Amra Hodzic,1,2 Ralf Veit,1 Ahmed A. Karim,1,2 Michael Erb,3 and Ben Godde1,4 1Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, D-72074 Tübingen, Germany, 2International Max Planck Research School, Graduate School of Neural and Behavioral Sciences, D-72074 Tübingen, Germany, 3Department of Neuroradiology, Section on Experimental Magnetic Resonance of the Central Nervous System, D-72076 Tübingen, Germany, and 4Department of Neurology, University Hospital, D-72076 Tübingen, Germany
منابع مشابه
Improvement and decline in tactile discrimination behavior after cortical plasticity induced by passive tactile coactivation.
Perceptual learning can be induced by passive tactile coactivation without attention or reinforcement. We used functional MRI (fMRI) and psychophysics to investigate in detail the specificity of this type of learning for different tactile discrimination tasks and the underlying cortical reorganization. We found that a few hours of Hebbian coactivation evoked a significant increase of primary (S...
متن کاملInvestigation of the relation between perceptual changes and cortical reorganization within the somatosensory cortex through passive stimulation protocols and modified use : a psychophysical and neurophysiological study in humans
It has been repeatedly demonstrated that changes in synaptic efficacy and cortical plasticity can be induced solely by manipulating the characteristics of the statistics of the afferent stimulation such as frequency, temporal structure and the degree of correlation. However, cellular studies alone do not allow to obtain deeper insight into processes that mediate cortical plasticity and changes ...
متن کاملTactile coactivation-induced changes in spatial discrimination performance.
We studied coactivation-based cortical plasticity at a psychophysical level in humans. For induction of plasticity, we used a protocol of simultaneous pairing of tactile stimulation to follow as closely as possible the idea of Hebbian learning. We reported previously that a few hours of tactile coactivation resulted in selective and reversible reorganization of receptive fields and cortical map...
متن کاملBehavioural and neurophysiological markers reveal differential sensitivity to homeostatic interactions between centrally and peripherally applied passive stimulation.
Repetitive transcranial magnetic stimulation (rTMS) is an effective tool for inducing functional plastic changes in the brain. rTMS can also potentiate the effects of other interventions such as tactile coactivation, a form of repetitive stimulation, when both are applied simultaneously. In this study, we investigated the interaction of these techniques in affecting tactile acuity and cortical ...
متن کاملShifts in cortical representations predict human discrimination improvement.
We report experiments combining assessment of spatial tactile discrimination behavior and measurements of somatosensory-evoked potentials in human subjects before and after short-term plastic changes to demonstrate a causal link between the degree of altered performance and reorganization. Plastic changes were induced by a Hebbian coactivation protocol of simultaneous pairing of tactile stimuli...
متن کامل