1,721,222 research outputs found
Tool use induces complex and flexible plasticity of human body representations
No full textPlasticity of body representation fundamentally underpins human tool use. Recent studies have demonstrated remarkably complex plasticity of body representation in humans, showing that such plasticity: (1) occurs flexibly across multiple time-scales, and (2) involves multiple body representations responding differently to tool use. Such findings reveal remarkable sophistication of body plasticity in humans, suggesting that Vaesen may overestimate the similarity of such mechanisms in humans and non-human primates
From statistical regularities in multisensory inputs to peripersonal space representation and body ownership: Insights from a neural network model
Get PDFPeripersonal space (PPS), the interface between the self and the environment, is represented by a network of multisensory neurons with visual (or auditory) receptive fields anchored to specific body parts, and tactile receptive fields covering the same body parts. Neurophysiological and behavioural features of hand PPS representation have been previously modelled through a neural network constituted by one multisensory population integrating tactile inputs with visual/auditory external stimuli. Reference frame transformations were not explicitly modelled, as stimuli were encoded in pre-computed hand-centred coordinates. Here we present a novel model, aiming to overcome this limitation by including a proprioceptive population encoding hand position. We confirmed behaviourally the plausibility of the proposed architecture, showing that visuo-proprioceptive information is integrated to enhance tactile processing on the hand. Moreover, the network's connectivity was spontaneously tuned through a Hebbian-like mechanism, under two minimal assumptions. First, the plasticity rule was designed to learn the statistical regularities of visual, proprioceptive and tactile inputs. Second, such statistical regularities were simply those imposed by the body structure. The network learned to integrate proprioceptive and visual stimuli, and to compute their hand-centred coordinates to predict tactile stimulation. Through the same mechanism, the network reproduced behavioural correlates of manipulations implicated in subjective body ownership: the invisible and the rubber hand illusion. We thus propose that PPS representation and body ownership may emerge through a unified neurocomputational process; the integration of multisensory information consistently with a model of the body in the environment, learned from the natural statistics of sensory inputs
The Sense of Body - arte, danza e neuroscienze
No full textDal 19 al 25 maggio 2008, presso il Teatro San Leonardo, via San Vitale 63, si è tenuta una serie di eventi artistici, scientifici e di spettacolo sul tema del CORPO UMANO. Gli eventi sono parte del progetto the Sense of Body, un approccio multidisciplinare al tema del Corpo umano, sponsorizzato dall’ISA (Istituto di Studi Avanzati dell’Università di Bologna, con la collaborazione della Direzione Cultura del Comune di Bologna. Il progetto è curato Andrea Serino, Alessia Tessari e Anna Borghi del Dipartimento di Psicologia dell’Università di Bologna.
Obiettivo del progetto è affrontare il tema del Corpo Umano, così attuale e di assoluto interesse per la ricerca scientifica, l’esperienza artistica ed il vivere sociale, secondo le diverse prospettive dell’Arte, della Scienza, della Danza, del Cinema e dell’Etica. Artisti contemporanei hanno esposto il loro approccio al corpo umano, utilizzando tecniche e linguaggi diversi. Danzatori hanno eseguito coreografie originali sul tema. Ricercatori in Psicologia e Neuroscienze Cognitive hanno presentato i risultati più recenti e le conoscenze più interessanti della ricerca attuale. Esperti di arte e cinema hanno presentato diversi approccio al tema corpo nella storia dell’espressione artistica.
Artisti, Danzatori, Critici e Scienziati si sono incontrati per confrontarsi, scambiare idee, fondere approcci e metodi, il tutto all’insegna della commistione delle prospettive e della multidisciplinarietà
Equivalent circuit of FET active loads for non-linear applications
Get PDFFET-based active loads have been fabricated and tested, and their equivalent circuit extracted for linear and non-linear applications. The extraction procedure requires the availability of an equivalent three-terminal FET device for accurate model identification. The model proves to be easy to extract, accurate and general
The Sense of Body - A multidisciplinary approach to body representaion
No full textThe sense of body is an international summer school in Cognitive Neuroscience on the topic of Body Representation. The key question will be how the mind and the brain represent the body.
The body and the self
Deficits of Body Representation
The Body in the Brain
Multisensory Body Representation
Open conference: the body in the brain and the mind
The target group of this course are PhD students, Post-doc and young researchers in the field of Cognitive Neuroscience
The Sense of Body - Di chi è il corpo?
No full textDurante l’incontro “Di chi è il corpo?” un Magistrato (Daniela Magagnoli, Giudice Minorile, Tribunale di Bologna), un Medico (Carlo Flamini, Ospedale Sant’Orsola, Bologna), un Giurista (Stefano Canestrari, Università di Bologna) ed un Filosofo (Elena Colombetti, Università Cattolica di Milano), con la moderazione di un Giornalista (Aldo Balzanelli, Caporedattore “la Repubblica”, Bologna), hanno affrontato il dibattito etico sul Corpo secondo le diverse prospettive.
Il titolo del dibattito è volutamente aperto, per lasciare la possibilità a ciascun relatore di affrontare liberamente le diverse questioni aperte nel dibattito Etico attuale sul rapporto fra Corpo e Persona, Corpo e Società, Corpo e Legge, Corpo e Medicina, Corpo e Religione.
L’evento si è svolto a Bologna, presso l’Aula del Silenzio, in Vicolo Bolognetti, il 15 Ottobre 2008.
Hanno partecipato un centinaio di persone
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Charatterisation of active loads for MMIC’s
No full textActive loads have been fabricated and tested, and their characterisation addressed for use in microwave CAD programs. The first results show that non-ideal (parasitic) effects are present that can easily be evaluated. Comparison with a three-terminal FET structure shows that a characterisation in terms of an equivalent circuit is feasible, and suggests a possible procedure for the extraction
A new method for active device load equivalent circuit extraction for MMICs
No full textActive device loads for monolithic microwave integrated circuits (MMICs) have been extensively studied and a new procedure for the extraction of their equivalent circuit has been developed. The procedure requires the availability of a coplanar three-terminal device for accurate model extraction. The new procedure is accurate, general, and easy to apply. Its validity has been demonstrated by extracting a scalable bias-dependent small-signal equivalent circuit of PHEMT-based active device loads up to 40 GHz. A good agreement between measured and modeled data has been obtained, confirming the validity and the accuracy of the proposed metho
- …
