853 research outputs found
Neurophysiological measures for perception of insecurity in urban landscape: do green areas and features play a significant role?
No full textPiccinin, G., Babiloni, F., Bonaiuto, M. (2016). Neurophysiological measures for perception of insecurity in urban landscape: do green areas and features play a significant role? Abstract of presentation at International Association People-environment Studies IAPS24 Lund/Alnarp 2016 “The human being at home, work and leisure. Sustainable use and development of indoor and outdoor spaces in late modern everyday life”. Lund, Sweden, 27 June – 1 July, 2016. Abstract pubbl. in AA.VV., International Association People-environment Studies IAPS24 Lund/Alnarp 2016 “The human being at home, work and leisure. Sustainable use and development of indoor and outdoor spaces in late modern everyday life”. Conference Abstracts. Lund, Sweden, 27 June – 1 July, 2016. Lund: Lund University and SLU (p. 143
Neurophysiological measures for perception of insecurity in urban landscape.
No full textPiccinin, G., Babiloni, F., Bonaiuto, M. (2017). Neurophysiological measures for perception of insecurity in urban landscape. Abstract of presentation at International Conference on Environmental Psychology “Theories of change and social innovation in transitions towards sustainability”. A Coruña, Spain, August 30 – 31 September 1, 2017. “. Abstract pubbl. in R. Mira, W. Schultz, T. Hartig, L. Steg (Eds.), Book of Abstracts. International Conference on Environmental Psychology “Theories of change and social innovation in transitions towards sustainability”. A Coruña: Instituto de Estudios e Investigación psicosocial Xoan Vicente Viqueira (p. 221). ISBN 978-84-932694-9-
Anticipation of somatosensory and motor events increases centro-parietal functional coupling: an EEG coherence study
No full textObjective: Does functional coupling of centro-parietal EEG rhythms selectively increase during the anticipation of sensorimotor events composed by somatosensory stimulation and visuomotor task? Methods: EEG data were recorded in (1) 'simultaneous' condition in which the subjects waited for somatosensory stimulation at left hand concomitant with a Go (or NoGo) visual stimulus triggering (50%) right hand movements and in (2) 'sequential' condition where the somatosensory stimulation was followed (+ 1.5 s) by a visuomotor Go/NoGo task. Centro-parietal functional coupling was modeled by spectral coherence. Spectral coherence was computed from Laplacian-transformed EEG data at delta-theta (2-7 Hz), alpha (8-14 Hz), beta 1 (15-21 Hz), beta 2 (22-33 Hz), and gamma (34-45 Hz) rhythms. Results: Before 'simultaneous' sensorimotor events, centro-parietal coherence regions increased in both hemispheres and at all rhythms. In the 'sequential' condition, right centro-parietal coherence increased before somatosensory event (left hand), whereas left centro-parietal coherence increased before subsequent Go/NoGo event (right hand). Conclusions: Anticipation of somatosensory and visuomotor events enhances contralateral centro-parietal coupling of slow and fast EEG rhythms. Significance: Predictable somatosensory and visuomotor events are anticipated not only by synchronization of cortical pyramidal neurons generating EEG power in parietal and primary sensorimotor cortical areas (Babiloni C, Brancucci A, Capotosto P, Arendt-Nielsen L, Chen ACN, Rossini PM. Expectancy of pain is influenced by motor preparation: a high-resolution EEG study of cortical alpha rhythms. Behav. Neurosci. 2005a; 119(2):503-511; Babiloni C, Brancucci A, Pizzella V, Romani G.L, Tecchio F, Torquati K, Zappasodi F, Arendt-Nielsen L, Chen ACN, Rossini PM. Contingent negative variation in the parasylvian cortex increases during expectancy of painful sensorimotor events: a magneto-encephalographic study. Behav. Neurosci. 2005b; 119(2):491-502) but also by functional coordination of these areas. (c) 2006 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved
Resting state cortical electroencephalographic rhythms in covert hepatic encephalopathy and Alzheimer's disease
No full textPatients suffering from prodromal (i.e., amnestic mild cognitive impairment, aMCI) and overt Alzheimer's disease (AD) show abnormal cortical sources of resting state electroencephalographic (EEG) rhythms. Here we tested the hypothesis that these sources show extensive abnormalities in liver cirrhosis (LC) patients with a cognitive impairment due to covert and diffuse hepatic encephalopathy (CHE). EEG activity was recorded in 64 LC (including 21 CHE), 21 aMCI, 21 AD, and 21 cognitively intact (Nold) subjects. EEG rhythms of interest were delta (2-4 Hz), theta (4-8 Hz), alpha 1 (8-10.5 Hz), alpha 2 (10.5-13 Hz), beta 1 (13-20 Hz), and beta 2 (20-30 Hz). EEG cortical sources were estimated by LORETA. Widespread sources of theta (all but frontal), alpha 1 (all but occipital), and alpha 2 (parietal, temporal) rhythms were higher in amplitude in all LC patients than in the Nold subjects. In these LC patients, the activity of central, parietal, and temporal theta sources correlated negatively, and parietal and temporal alpha 2 sources correlated positively with an index of global cognitive status. Finally, widespread theta (all but frontal) and alpha 1 (all but occipital) sources showed higher activity in the sub-group of LC patients with CHE than in the patients with aMCI or AD. These results unveiled the larger spatial-frequency abnormalities of the resting state EEG sources in the CHE compared to the AD condition
High resolution EEG: new model-dependent spatial deblurring method using a realistically shaped MR constructed subject's head model
No full textA High resolution EEG method based on the correction of the surface laplacian estimate for subject’s variable scalp thickness. Electroenceph. clin. Neurophysiol
No full textSpline Laplacian estimate of EEG potentials over a realistic magnetic resonance-constructed ,scalp surface model
No full textPerformances of surface Laplacian estimators: a study on simulated and real scalp potential distributions
No full textHigh resolution EEG: source estimates of Laplacian-transformed somatosensory-evoked potentials using a realistic subject head model constructed from magnetic resonance images
No full textBilateral neuromagnetic activation of human primary sensorimotor cortex in preparation and execution of unilateral voluntary finger movements
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