Primary motor area contribution to attentional reorienting after distraction
ABSTRACT The anatomical structures involved in distraction-related processing in the auditory domain were investigated using magnetoencephalography. Participants performed a duration-discrimination task on a sequence of 200 and 400 ms long tones. Infrequent (12%) task-irrelevant pitch changes resulted in slower discriminative responses and more errors. Event-related potentials to these changes show an increased N1, a mismatch negativity, a P3a, and a reorienting negativity. The event-related magnetic fields revealed focal activities in superior and medial temporal areas in the N1/mismatch negativity time range. No significant activity was found in the P3a interval. In the reorienting negativity interval, significant activity was located in the primary motor area. This suggests that action-selection-related activity also contributes to attentional reorientation after distraction.
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- "RON usually shows a frontal (e.g., Berti and Schrö ger, 2001), frontocentral (e.g., Roeber et al., 2003), or central (e.g., Horvá th et al., 2008c) scalp maximum. Performing the task optimally after distraction may also require adjustments to response-and decision-related aspects of task-related processing (Berti, 2008a; Escera et al., 2001; Horvá th et al., 2008a), which may also be partly reflected by RON, or by the modulation of the parietal P3b component, which is typically elicited by targets requiring a response. The P3b probably also reflects the maintenance of the task-related stimulus context information in working memory, or decision-related processes regarding stimulus–response associations (Donchin and Coles, 1988; Polich, 2007; but see Verleger, 1988, 2008). "
ABSTRACT: Event-related potential (ERP) correlates of distraction are usually investigated in the oddball paradigm following a discrete, trial-by-trial stimulation protocol. In this design, participants perform a discrimination task while oddball stimuli deviate in a task-irrelevant stimulus feature. In our experiment, participants detected gaps in a continuous tone while infrequent frequency glides served as distracting events. Glides preceding a gap by 150ms delayed the response to the gap and elicited the ERP sequence of N1, probably MMN, P3a, and reorienting negativity, suggesting that these responses reflect distraction-related processes which are neither task- nor stimulation-specific. When participants watched a silent movie and the auditory stimulation was task-irrelevant, glides preceding a gap by 150ms enhanced the amplitude of the gap-elicited N1. However, when the auditory stimulation was task-relevant, the gap-elicited N1 was attenuated. These results show that the glides drew attention away from the ongoing task, both from watching the silent movie and from detecting gaps.Biological psychology 03/2010; 83(3):229-38. DOI:10.1016/j.biopsycho.2010.01.004 · 3.40 Impact Factor
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ABSTRACT: Purpose Feeling sense of full immersion in computer-generated interactive environments often occurs when the user is enjoying the contents and physiologically and behaviorally responding to the events from that world as if they were real. In this state, the individual may feel embodied in the simulated world even more than in the real world. Although the method of interaction could influence this embodied state during immersive experiencing, the brain mechanism has not yet been investigated. Here we directly investigate brain activities related to an embodied state according to the type of interaction. Methods Our method uses fMRI scanning during interaction with a virtual avatar using a real-action paradigm and using a simple button as a control task. Results As the results, we observed the parietal lobe’s laterality corresponded to the type of interaction, the left parietal lobe for action task and the right one for the button click condition. In addition, there was a correlation between the motor cortex activities and the co-presence score for realaction condition. The parietal lobe’s laterality is related to transformation of self egocentrically or allocentrically from a 1st or 3rd person perspective. Conclusions Our results provide direct evidence for the involvement of a 1st person perspective embodiment process into a simulated world, particularly into self-avatar, when individual experiences involve a more real-action based interaction method. In contrast, when interacting with simple button-click method, the 3rd person perspective simulation process is recruited for the interaction by controlling the self-avatar rather than experience by oneself with the world.Biomedical Engineering Letters 09/2012; 2(3). DOI:10.1007/s13534-012-0068-5
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ABSTRACT: Distraction is a disruption of a selective attention set triggered by infrequent, unpredictable events. In the present study, two hypotheses on the nature of this attention change were contrasted in the auditory domain: (1) distraction is a specific attention-switch: attention is diverted from the task-relevant to the distracting information or (2) distraction is a general attention resetting, that is, a transition to a general attention set in which the organism is more capable of facing any event. The general attention resetting hypothesis predicts that any infrequent, unpredictable stimulus would trigger distraction, whereas the specific attention-switch hypothesis predicts that such a stimulus triggers distraction only if it deviates in a task-irrelevant stimulus aspect. To test this, a sequence of tone-pairs was presented. The participants' task was to respond according to the direction of within-pair pitch-change. Deviant trials were presented occasionally (10%). In the Relevant Deviance condition, the deviation concerned the task-relevant stimulus aspect (larger within-pair pitch-difference); in the Irrelevant Deviance condition the deviance occurred in a task-irrelevant stimulus aspect (spectral width of the second tone of the pair). In the Double Deviance condition, deviants featured both a larger pitch-difference and a spectral width difference. The elicitation pattern of the N2b/MMN, P3a and late negative components favors the specific attention-switch hypothesis, that is, distraction comprises an involuntary attention shift from the task-relevant information to the distracting one. The presence of deviance-related response time delay in the Relevant Deviance condition suggests that other effects unrelated to distraction also occurred.Brain Research 09/2008; 1229:193-203. DOI:10.1016/j.brainres.2008.06.096 · 2.84 Impact Factor