Distinct electroencephalographic responses to disturbances and distractors during continuous reaching movements
| Autor: | Hillel Pratt, Miriam Zacksenhouse, Reuven Katz, Igor Demchenko |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Adult
Male Elementary cognitive task Feedback Psychological Motor Activity Neuropsychological Tests Electroencephalography 050105 experimental psychology Task (project management) 03 medical and health sciences P3a 0302 clinical medicine Component (UML) P3b Psychophysics medicine Humans Attention 0501 psychology and cognitive sciences Eye Movement Measurements Molecular Biology Oddball paradigm Communication medicine.diagnostic_test business.industry General Neuroscience 05 social sciences Motor commands Brain Event-Related Potentials P300 Biomechanical Phenomena Arm Visual Perception Neurology (clinical) Psychology business 030217 neurology & neurosurgery Developmental Biology Cognitive psychology |
| Zdroj: | Brain Research. 1652:178-187 |
| ISSN: | 0006-8993 |
| DOI: | 10.1016/j.brainres.2016.09.040 |
| Popis: | Discrepancies between actual and appropriate motor commands, dubbed low-level errors, have been shown to elicit a P300 like component. P300 has been studied extensively in cognitive tasks using, in particular, the three-stimulus oddball paradigm. This paradigm revealed two sub-components, known as P3a and P3b, whose relative contributions depend on saliency and task-relevance, respectively. However, the existence and roles of these sub-components in response to low-level errors are poorly understood. Here we investigated responses to low level errors generated by disturbances – including target and cursor jumps, versus responses to distractors, i.e., environmental changes that are irrelevant to the reaching task. Additionally, we examined the response to matching cursor and target jumps (dual jumps), which generate estimation errors, and are thus considered task relevant disturbances, but do not generate low level errors. We found that a significant P3a-like component is evoked by both disturbances and distractors, whereas the P3b-like component is significantly stronger in response to disturbances than distractors. The P3b-like component appears also in response to dual jumps, even though there are no low level errors. We conclude that disturbances and distractors elicit distinct responses, and that the P3b-like component reflects estimation errors rather than low-level errors. |
| Databáze: | OpenAIRE |
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