Abstract
[Autom. eng. transl.] Numerous neuroimaging studies have examined the hypothesis of a consonance of the motor, premotor and somatosensory cortical areas involved in observation (OS), imagination (IM) and execution (ES) of gestures. However this overlap turns out to be only partial and in recent studies different hemodynamic responses are highlighted depending on the motor task. Furthermore, there are still few studies that distinguish the type of gesture (transitive or intransitive) and that use multi-method techniques for detecting the cortical response. The present study is aimed at investigating brain activation patterns in response to OS, ES and IM of specific gestures. 48 videos of intransitive and transitive gestures were selected, in the latter case also taking into account the degree of manipulation of the object. Following the observation of the gesture, the subject was asked to do it or imagine it. Event-related cortical activation data were acquired in co-registration EEG and fNIRS (functional Near-Infrared Spectroscopy), in reference to left frontal-central, central and parietal cortical areas, following a detection system in continues to 24 channels. Data analysis showed that hemodynamic responses differ in different experimental conditions. In particular, the OS and IM conditions appear to define a similar and distinct activation pattern from what emerged in the ES condition. The distinction between types of gestures is less relevant. The results show that it is possible to distinguish different activation patterns according to the type of motor task: the hemodynamic profile shows that, in the motor areas, the greatest differences between the experimental conditions are detected, as a possible effect of the actual execution of the gesture vs. his simple observation or imagination. The relevance of the correlation between different EEG-fNIRS recording techniques is also highlighted.
Translated title of the contribution | [Autom. eng. transl.] Observing, executing and imagining a gesture: study in multi-method fNIRS and EEG |
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Original language | Italian |
Title of host publication | Atti del «XX Congresso Nazionale della Sezione di Psicologia Sperimentale AIP» |
Pages | 33 |
Number of pages | 1 |
Publication status | Published - 2014 |
Event | XX Congresso Nazionale della Sezione di Psicologia Sperimentale AIP - Pavia Duration: 15 Sept 2014 → 17 Sept 2014 |
Conference
Conference | XX Congresso Nazionale della Sezione di Psicologia Sperimentale AIP |
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City | Pavia |
Period | 15/9/14 → 17/9/14 |
Keywords
- EEG
- Movimento
- Osservazione
- fNIRS