1,721,095 research outputs found
Hemispheric Asymmetry in Visual Processing: an ERP Study on Spatial Frequency Gratings
No full textAbstract: A hemispheric asymmetry for the processing of global versus local visual information is known. In this study, we investigated the existence of a hemispheric asymmetry for the visual processing of low versus high spatial frequency gratings. The event-related potentials were recorded in a group of healthy right-handed volunteers from 30 scalp sites. Six types of stimuli (1.5, 3 and 6 c/deg gratings) were randomly flashed 180 times in the left and right upper hemifields. The stimulus duration was 80 ms, and the interstimulus interval (ISI) ranged between 850 and 1000 ms. Participants paid attention and responded to targets based on their spatial frequency and location. The C1 and P1 visual responses, as well as a later selection negativity and a P300 component of event-related potentials (ERPs), were quantified and subjected to repeated-measure analyses of variance (ANOVAs). Overall, the performance was faster for the right visual field (RVF), thus suggesting a left hemispheric advantage for the attentional selection of local elements. Similarly, the analysis of the mean area amplitude of the C1 (60–110 ms) sensory response showed a stronger attentional effect (F+L+ vs. F−L+) at the left occipital areas, thus suggesting the sensory nature of this hemispheric asymmetry
sj-zip-1-pom-10.1177_03057356211050117 – Supplemental material for Common neural bases for processing speech prosody and music: An integrated model
No full textSupplemental material, sj-zip-1-pom-10.1177_03057356211050117 for Common neural bases for processing speech prosody and music: An integrated model by Alice Mado Proverbio and Elisabetta Piotti in Psychology of Music</p
sj-docx-1-pom-10.1177_03057356241245997 – Supplemental material for Unraveling the interplay of emotions in art and music: An event-related potential investigation
No full textSupplemental material, sj-docx-1-pom-10.1177_03057356241245997 for Unraveling the interplay of emotions in art and music: An event-related potential investigation by Francesco De Benedetto, Eleonora Ghiraldini, Nausicaa Capizzi and Alice Mado Proverbio in Psychology of Music</p
Alice Mado Proverbio, Neuroscienze cognitive della musica. Il cervello musicale tra arte e scienza, Bologna, Zanichelli, 2019
No full textNeuroscienze cognitive della musica by Alice Mado Proverbio offers an updated selection of studies on the delicate interweaving between musical practice and brain plasticity. The book provides evidence on how the learning and enjoyment of music can be verified by means of neuroimaging techniques, showing how it determines significant variations in sensory and motor cortical areas as well as in limbic centers, the guardians of emotions. The many topics addressed, from perfect pitch to rehabilitation in Parkinson's and mirror neurons, turn out to be useful in an educational perspective, building a valid framework of reference for any further independent investigation. As a reader and commentator on this text, I hope that readers who, like me, are fascinated with the musical synaptic forest, will be able to follow the story of science without getting lost in dead ends, and fully discover just to what degree we are made of music.Neuroscienze cognitive della musica di Alice Mado Proverbio offre un’aggiornata selezione di studi sul delicato intreccio tra pratica musicale e plasticità cerebrale. Il libro documenta come l’apprendere e il godere della musica possano essere verificati tramite tecniche di neuroimaging che mostrano come essa determini variazioni significative nelle aree sensoriali e motorie corticali così come nei centri limbici, custodi delle emozioni. I numerosi temi affrontati, dall'orecchio assoluto alla riabilitazione nel Parkinson, ai neuroni a specchio, ben si inseriscono nel contesto di una chiara utilità didattica, costruendo uno valido schema di riferimento per poter proseguire autonomamente eventuali approfondimenti. Da lettrice e commentatrice di questo testo, auguro al lettore che come me abbia a cuore l’incanto della foresta sinaptica musicale, di seguire il racconto della scienza senza perdersi in vicoli ciechi, per poter arrivare a scoprire a pieno fino a che punto siamo fatti di musica
Elettrofisiologia del linguaggio. Meccanismi di comprensione del linguaggio attraverso i potenziali elettromagnetici correlati a eventi
No full text
State-of-the-Art Equipment for Electroencephalographic and Magnetoencephalographic Investigation of the Brain and Cognition
No full textERP Signatures of Stimulus Choice in Gaze-Independent BCI Communication
No full textThis study aimed to identify electrophysiological markers (event-related potentials, ERPs) of intentional, need-related mental activity under controlled gaze fixation, with potential applications in brain–computer interface (BCI) development for individuals with severe motor impairments. Methods: Using stimuli from the PAIN Pictionary—a pictogram database for non-verbal communication in locked-in syndrome (LIS) contexts—neural responses were recorded via high-density EEG in 30 neurologically healthy adults (25 included after artifact-based exclusion). Participants viewed randomized sequences of pictograms representing ten fundamental need categories (e.g., “I am cold”, “I’m in pain”), with one category designated as the target per sequence. Each pictogram was followed by a visual cue prompting a button press: during training, participants executed the press; during the main task, they performed right-hand motor imagery while maintaining central fixation. Results: ERP analyses revealed a robust P300 response (450–650 ms; p p = 0.008) over fronto-lateral sites indicated anticipatory attention and motor preparation, while a left-lateralized late CNV (2250–2750 ms; p = 0.035) appeared to embody the preparation of a finalized motor plan for the forthcoming right-hand imagined response. A centro-parietal P600 component (600–800 ms; p = 0.044) emerged during response monitoring, reflecting evaluative and decisional processes. SwLORETA source analyses localized activity within a distributed network spanning prefrontal, premotor, motor, parietal, and limbic areas. Conclusions: These findings demonstrate that motor imagery alone can modulate pattern-onset ERP components without overt movement or gaze shifts, supporting the translational potential of decoding need-related intentions for thought-driven communication systems in individuals with profound motor impairments
Left-Hemispheric Asymmetry for Object-Based Attention: an ERP Study
No full textIt has been shown that selective attention enhances the activity in visual regions associated with stimulus processing. The left hemisphere seems to have a prominent role when non-spatial attention is directed towards specific stimulus features (e.g., color, spatial frequency). The present electrophysiological study investigated the time course and neural correlates of object-based attention, under the assumption of left-hemispheric asymmetry. Twenty-nine right-handed participants were presented with 3D graphic images representing the shapes of different object categories (wooden dummies, chairs, structures of cubes) which lacked detail. They were instructed to press a button in response to a target stimulus indicated at the beginning of each run. The perception of non-target stimuli elicited a larger anterior N2 component, which was likely associated with motor inhibition. Conversely, target selection resulted in an enhanced selection negativity (SN) response lateralized over the left occipito-temporal regions, followed by a larger centro-parietal P300 response. These potentials were interpreted as indexing attentional selection and categorization processes, respectively. The standardized weighted low-resolution electromagnetic tomography (swLORETA) source reconstruction showed the engagement of a fronto-temporo-limbic network underlying object-based visual attention. Overall, the SN scalp distribution and relative neural generators hinted at a left-hemispheric advantage for non-spatial object-based visual attention
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