Publications de Roberto Martuzzi

Relation between palm and finger cortical representations in primary somatosensory cortex: A 7T fMRI study

Roberto Martuzzi, Olaf Blanke, Michel Akselrod, Andrea Serino

Many studies focused on the cortical representations of fingers, while the palm is relatively neglected despite its importance for hand function. Here, we investigated palm representation (PR) and its relationship with finger representations (FRs) in prima ...

Wiley2021

Contribution of interaction force to the sense of hand ownership and the sense of hand agency

Roberto Martuzzi, Olaf Blanke, Michel Akselrod

When performing willed actions, we have the unified and coherent experience of owning and controlling our body. Body ownership is believed to emerge from the integration of coherent multisensory signals, while agency is believed to emerge from the coherenc ...

Nature Portfolio2021

Get real: Orbitofrontal cortex mediates the ability to sense reality in early adolescents

Dimitri Nestor Alice Van De Ville, Roberto Martuzzi, Lorena Gonçalves de Alcântara e Freitas Krikler, Vanessa Siffredi

Introduction Orbitofrontal reality filtering (ORFi) is a memory mechanism that distinguishes whether a thought is relevant to present reality or not. In adults, it is mediated by the orbitofrontal cortex (OFC). This region is still not fully developed in p ...

2020

Functional imaging of rostrocaudal spinal activity during upper limb motor tasks

Dimitri Nestor Alice Van De Ville, Roberto Martuzzi, Nawal Noëlle Kinany, Elvira Pirondini, Silvestro Micera

The spinal cord is the main interface between the brain and the periphery. It notably plays a central role in motor control, as spinal motoneurons activate skeletal muscles involved in voluntary movements. Yet, the spinal mechanisms underlying human moveme ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2019

Bilateral Rolandic operculum processing underlying heartbeat awareness reflects changes in bodily self-consciousness

Bruno Herbelin, Roberto Martuzzi, Olaf Blanke, Javier Bello Ruiz, Roy Salomon, Maria Laura Blefari, Andrea Serino

Exteroceptive bodily signals (including tactile, proprioceptive and visual signals) are important information contributing to self-consciousness. Moreover, prominent theories proposed that visceral signals about internal bodily states are equally or even m ...

Wiley-Blackwell2017

Anatomical and functional properties of the foot and leg representation in areas 3b, 1 and 2 of primary somatosensory cortex in humans: A 7T fMRI study

Roger Gassert, Roberto Martuzzi, Olaf Blanke, Michel Akselrod, Wietske Van der Zwaag, Andrea Serino

Primary somatosensory cortex (S1) processes somatosensory information and is composed of multiple subregions. In particular, tactile information from the skin is encoded in three subregions, namely Brodmann areas (BAs) 3b, 1 and 2, with each area represent ...

2017

Upper limb cortical maps in amputees with targeted muscle and sensory reinnervation

Roberto Martuzzi, Olaf Blanke, Michel Akselrod, Wietske Van der Zwaag, Giulio Rognini, Roy Salomon, Maria Laura Blefari, Andrea Serino, Elisa Canzoneri

Neuroprosthetics research in amputee patients aims at developing new prostheses that move and feel like real limbs. Targeted muscle and sensory reinnervation (TMSR) is such an approach and consists of rerouting motor and sensory nerves from the residual li ...

Oxford University Press2017

The multisensory function of the human primary visual cortex

Roberto Martuzzi, Antonia Thelen

It has been nearly 10 years since Ghazanfar and Schroeder (2006) proposed that the neocortex is essentially multisensory in nature. However, it is only recently that sufficient and hard evidence that supports this proposal has accrued. We review evidence t ...

Pergamon-Elsevier Science Ltd2016

Stroking or Buzzing? A Comparison of Somatosensory Touch Stimuli Using 7 Tesla fMRI

Roberto Martuzzi, Rolf Gruetter, Wietske Van der Zwaag

Studying body representations in the brain helps us to understand how we humans relate to our own bodies. The in vivo mapping of the somatosensory cortex, where these representations are found, is greatly facilitated by the high spatial resolution and high ...

Public Library of Science2015

Distinct contributions of Brodmann areas 1 and 2 to body ownership

Roberto Martuzzi, Rolf Gruetter, Olaf Blanke, Sebastian Dieguez Falcon, Wietske Van der Zwaag, Andrea Serino

Although body ownership – i.e. the feeling that our bodies belong to us – modulates activity within the primary somatosensory cortex (S1), it is still unknown whether this modulation occurs within a somatotopically defined portion of S1. We induced an illu ...

Oxford University Press2015

The Brain Network reflecting Bodily Self-Consciousness: a functional connectivity study

Roberto Martuzzi, Olaf Blanke, Silvio Ionta, Roy Salomon

Several brain regions are important for processing self-location and first-person perspective, two important aspects of bodily self-consciousness. However, the interplay between these regions has not been clarified. In addition, while self-location and fir ...

Oxford Univ Press2014

Human finger somatotopy in areas 3b, 1, and 2: A 7T fMRI study using a natural stimulus

Roberto Martuzzi, Rolf Gruetter, Olaf Blanke, Juliane Farthouat, Wietske Van der Zwaag

To study the properties of human primary somatosensory (S1) cortex as well as its role in cognitive and social processes, it is necessary to noninvasively localize the cortical representations of the body. Being arguably the most relevant body parts for ta ...

Wiley-Blackwell2014

Multisensory Origin of the Subjective First-Person Perspective: Visual, Tactile, and Vestibular Mechanisms

Roberto Martuzzi, Olaf Blanke, Christophe Lopez, Valentin Marc Schmutz, Christian Pfeiffer, Julio Duenas

In three experiments we investigated the effects of visuo-tactile and visuo-vestibular conflict about the direction of gravity on three aspects of bodily self-consciousness: self-identification, self-location, and the experienced direction of the first-per ...

Public Library of Science2013

Digit somatotopy in the human cerebellum: A 7T fMRI study

Roberto Martuzzi, Rolf Gruetter, Olaf Blanke, Wietske Van der Zwaag, José Pedro Rebelo Ferreira Marques, Remy Kusters

The representation of the human body in the human cerebellum is still relatively unknown, compared to the well-studied homunculus in the primary somatosensory cortex. The investigation of the body representation in the cerebellum and its somatotopic organi ...

Academic Press Inc Elsevier Science2013

The hand representation in the human cerebellum overlaps with the digit representations

Roberto Martuzzi, Rolf Gruetter, Olaf Blanke, Wietske Van der Zwaag, José Pedro Rebelo Ferreira Marques, Remy Kusters

2012

Neuroscience robotics to investigate multisensory integration and bodily awareness

Roger Gassert, Dominique Chapuis, Roberto Martuzzi, Olaf Blanke, Silvio Ionta, Christian Pfeiffer, Julio Duenas

Humans experience the self as localized within their body. This aspect of bodily self-consciousness can be experimentally manipulated by exposing individuals to conflicting multisensory input, or can be abnormal following focal brain injury. Recent technol ...

2012

A whole-brain voxel based measure of intrinsic connectivity contrast reveals local changes in tissue connectivity with anesthetic without a priori assumptions on thresholds or regions of interest

Roberto Martuzzi

The analysis of spontaneous fluctuations of functional magnetic resonance imaging (fMRI) signals has recently gained attention as a powerful tool for investigating brain circuits in a non-invasive manner. Correlation-based connectivity analysis investigate ...

2011

Finger Somatotopic Map in the Human Cerebellum revealed with 7 Tesla fMRI

Roberto Martuzzi, Rolf Gruetter, Olaf Blanke, Wietske Van der Zwaag, José Pedro Rebelo Ferreira Marques

2011

Finger Somatotopy in the Human Cerebellum revealed with fMRI at 7 Tesla

Roberto Martuzzi, Rolf Gruetter, Olaf Blanke, Wietske Van der Zwaag, José Pedro Rebelo Ferreira Marques

2011

Methods for Determining Frequency- and Region-Dependent Relationships Between Estimated LFPs and BOLD Responses in Humans

Jean-Philippe Thiran, Roberto Martuzzi

The relationship between electrophysiological and functional magnetic resonance imaging (fMRI) signals remains poorly understood. To date, studies have required invasive methods and have been limited to single functional regions and thus cannot account for ...

2009