Specific forms of neural activity associated with tactile space awareness
| Autor: | Paolo Maria Rossini, Massimiliano Oliveri, Maria Maddalena Filippi, Paola Cicinelli, Carlo Caltagirone, Raimondo Traversa |
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| Rok vydání: | 2002 |
| Předmět: |
Adult
Male genetic structures Posterior parietal cortex Stimulation Brain damage Stimulus (physiology) Synaptic Transmission Functional Laterality Lateralization of brain function Extinction Psychological Hypesthesia Perceptual Disorders Magnetics Evoked Potentials Somatosensory Parietal Lobe Physical Stimulation Reaction Time medicine Humans Attention Aged Aged 80 and over General Neuroscience Parietal lobe Neural Inhibition Middle Aged Tactile perception Electric Stimulation Touch Brain Injuries Space Perception Female medicine.symptom Psychology Neuroscience Psychomotor Performance Electrical brain stimulation Cognitive psychology |
| Zdroj: | Neuroreport. 13:997-1001 |
| ISSN: | 0959-4965 |
| DOI: | 10.1097/00001756-200206120-00002 |
| Popis: | Left tactile extinction, in which a left tactile stimulus fails to access consciousness only when a right stimulus is presented simultaneously, offers a model for studying tactile awareness from its transitory absence. Pairs of transcranial magnetic stimuli (TMS) on the parietal cortex inhibit contralateral tactile perception when separated by an interval of 1 ms. We have applied this technique on the left parietal cortex of right brain damaged (RBD) patients and normal subjects and have shown a selective lack of paired TMS inhibitory effects on right tactile perception of patients during bimanual stimulation. TMS effects were normal during unimanual right stimulation. These results suggest the presence of a specific pattern of inhibitory/excitatory interactions in parietal brain areas as critical for tactile awareness. |
| Databáze: | OpenAIRE |
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