Viviana Ponzo

ORCID: 0000-0002-7969-0424
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About
Contact & Profiles
Research Areas
  • Transcranial Magnetic Stimulation Studies
  • Functional Brain Connectivity Studies
  • Neurological disorders and treatments
  • Parkinson's Disease Mechanisms and Treatments
  • EEG and Brain-Computer Interfaces
  • Vestibular and auditory disorders
  • Advanced Neuroimaging Techniques and Applications
  • Neural dynamics and brain function
  • Dementia and Cognitive Impairment Research
  • Alzheimer's disease research and treatments
  • Stroke Rehabilitation and Recovery
  • Motor Control and Adaptation
  • Eating Disorders and Behaviors
  • Botulinum Toxin and Related Neurological Disorders
  • Neurological Disorders and Treatments
  • Diet and metabolism studies
  • Neuroscience and Neuropharmacology Research
  • Memory and Neural Mechanisms
  • Genetic Neurodegenerative Diseases
  • Neuroscience and Music Perception
  • Urinary Bladder and Prostate Research
  • Spinal Dysraphism and Malformations
  • Intraoperative Neuromonitoring and Anesthetic Effects
  • Spatial Neglect and Hemispheric Dysfunction
  • Cancer-related cognitive impairment studies

Istituti di Ricovero e Cura a Carattere Scientifico
2013-2023

Bambino Gesù Children's Hospital
2019-2023

Fondazione Santa Lucia
2012-2021

University of Brescia
2017

Policlinico Tor Vergata
2017

Brescia University
2017

University of Rome Tor Vergata
2017

Gait and balance impairment is associated with poorer functional recovery after stroke. The cerebellum known to be strongly implicated in the reorganization of motor networks patients stroke, especially for gait functions.To determine whether cerebellar intermittent θ-burst stimulation (CRB-iTBS) can improve functions hemiparesis due stroke.This randomized, double-blind, sham-controlled phase IIa trial investigated efficacy safety a 3-week treatment CRB-iTBS coupled physiotherapy promoting...

10.1001/jamaneurol.2018.3639 article EN JAMA Neurology 2018-11-26

Learning of new skills may occur through Hebbian associative changes in the synaptic strength cortical connections [spike-timing-dependent plasticity (STDP)], but how precise temporal relationship presynaptic and postsynaptic inputs determines STDP effects humans is poorly understood. We used a novel paired stimulation protocol to repeatedly activate short-latency connection between posterior parietal cortex primary motor (M1) left-dominant hemisphere. In different experiments, we...

10.1523/jneurosci.4988-12.2013 article EN Journal of Neuroscience 2013-06-05

A fully adapted behavior requires maximum efficiency to inhibit processes in the motor domain [1Aron A.R. Durston S. Eagle D.M. Logan G.D. Stinear C.M. Stuphorn V. Converging evidence for a fronto-basal-ganglia network inhibitory control of action and cognition.J. Neurosci. 2007; 27: 11860-11864Crossref PubMed Scopus (403) Google Scholar]. Although number cortical subcortical brain regions have been implicated, converging suggests that activation right inferior frontal gyrus (r-IFG)...

10.1016/j.cub.2014.10.043 article EN cc-by Current Biology 2014-12-01

In animal models of Alzheimer's disease (AD), amyloid-β fragments interfere with mechanisms cortical plasticity such as long-term potentiation (LTP) and depression (LTD). the current study, we applied repetitive transcranial magnetic

10.3233/jad-2012-120532 article EN Journal of Alzheimer s Disease 2012-08-22

Paired associative stimulation (PAS) protocols induce forms of spike-timing-dependent-plasticity (STDP) when paired pulses are repeatedly applied with different timing over interconnected cortical areas such as the posterior parietal cortex (PPC) and primary motor (M1). However, assessment PAS effects is usually limited to M1 through recording motor-evoked potential (MEP) amplitude. Here, by combining transcranial magnetic (TMS) EEG we aimed at investigating both (PPC, M1) modulation induced...

10.1523/jneurosci.1777-13.2013 article EN cc-by-nc-sa Journal of Neuroscience 2013-08-21

To determine whether a transcranial magnetic stimulation (TMS) multiparadigm approach can be used to distinguish Alzheimer disease (AD) from frontotemporal dementia (FTD).Paired-pulse TMS was investigate short-interval intracortical inhibition (SICI) and facilitation (ICF), long-interval inhibition, short-latency afferent (SAI) measure the activity of different circuits in patients with AD, FTD, healthy controls (HC). The primary outcome measures were sensitivity specificity measures,...

10.1212/wnl.0000000000004232 article EN Neurology 2017-07-27

Abstract Voluntary movement control and execution are regulated by the influence of cerebellar output over different interconnected cortical areas, through dentato-thalamo connections. In present study we applied transcranial magnetic stimulation (TMS) electroencephalography (EEG) to directly assess effects theta-burst (TBS) controlateral primary motor cortex (M1) posterior parietal (PPC) in a group healthy volunteers. We found TBS-dependent bidirectional modulation TMS-evoked activity;...

10.1038/srep36191 article EN cc-by Scientific Reports 2016-10-31

Alzheimer's disease (AD) is considered an age-related disorder. However, it unclear whether AD induces the same pathological and neurophysiological modifications in synaptic functions independently from age of onset. We used transcranial magnetic stimulation tools to investigate mechanisms cortical plasticity sensory-motor integration patients with a wide range onset.We evaluated newly diagnosed sporadic (n = 54) comparison healthy age-matched controls (HS; n 24). Cortical long-term...

10.1002/ana.24695 article EN Annals of Neurology 2016-06-03

Abstract Interhemispheric interactions in stroke patients are frequently characterized by abnormalities, terms of balance and inhibition. Previous results showed an impressive variability, mostly given to the instability motor‐evoked potentials when evoked from affected hemisphere. We aim find reliable interhemispheric measures with a not‐evocable potential hemisphere, combining transcranial magnetic stimulation (TMS) electroencephalography. Ninteen (seven females; 61.26 ± 9.8 years) were...

10.1002/hbm.25297 article EN cc-by Human Brain Mapping 2021-01-13

Levodopa-induced dyskinesias are disabling motor complications of long-term dopamine replacement in patients with Parkinson's disease. In recent years, several alternative models have been proposed to explain the pathophysiological mechanisms underlying this hyperkinetic disorder. particular, our group has shed new light on role prefrontal cortex as a key site interest, demonstrating that, among other areas, inferior frontal is particularly characterized by altered patterns anatomical and...

10.1093/brain/awu329 article EN Brain 2014-11-19

Objective To determine the ability of transcranial magnetic stimulation (TMS) in detecting synaptic impairment patients with Alzheimer’s disease (AD) and predicting cognitive decline since early phases disease. Methods We used TMS-based parameters to evaluate long-term potentiation (LTP)-like cortical plasticity cholinergic activity as measured by short afferent inhibition (SAI) 60 newly diagnosed AD 30 healthy age-matched subjects (HS). Receiver operating characteristic (ROC) curves were...

10.1136/jnnp-2017-317879 article EN Journal of Neurology Neurosurgery & Psychiatry 2018-07-21

The cerebellum is strongly implicated in learning new motor skills. Theta burst stimulation (TBS), a form of repetitive transcranial magnetic stimulation, can be used to influence cerebellar activity. Our aim was explore the potential TBS modulating visuo-motor adaptation, learning, young healthy subjects. Cerebellar applied immediately before phase adaptation task (VAT), two different experiments. Firstly, we evaluated behavioral effects continuous (cTBS), intermittent (iTBS) or sham on...

10.1016/j.neuroimage.2019.116424 article EN cc-by-nc-nd NeuroImage 2019-12-02

The dysfunction of cholinergic neurons is a typical hallmark in Alzheimer's disease (AD). Previous findings demonstrated that high density receptors found the thalamus and cerebellum compared with cerebral cortex hippocampus. We aimed at investigating whether activation cerebello-thalamo-cortical pathway by means cerebellar theta burst stimulation (TBS) could modulate central functions evaluated vivo using neurophysiological determination Short-Latency Afferent Inhibition (SLAI). tested SLAI...

10.3389/fnagi.2013.00002 article EN cc-by Frontiers in Aging Neuroscience 2013-01-01

Abstract In Alzheimer’s disease (AD) patients, apopoliprotein (APOE) polymorphism is the main genetic factor associated with more aggressive clinical course. However, interaction between cerebrospinal fluid (CSF) tau protein levels and APOE genotype has been scarcely investigated. A possible key mechanism invokes dysfunction of synaptic plasticity. We investigated how CSF interacts in AD patients. firstly explored whether influence progression long-term potentiation (LTP)-like cortical...

10.1038/s41598-017-14204-3 article EN cc-by Scientific Reports 2017-10-17

Background:Although motor disturbances parallel the course of dementia, worsening both quality life and social costs, pathogenesis remains still unclear. Objective:Through combination cerebrospinal fluid (CSF) biomarkers assessment transcranial magnetic stimulation (TMS) protocols , here we provided a cross-sectional study to understand pathogenic mechanisms Alzheimer's disease (AD)-related early disturbances. Methods:The phenotype, as defined with Unified Parkinson's Disease Rating Scale...

10.3233/jad-171166 article EN Journal of Alzheimer s Disease 2018-06-12

Cerebrospinal fluid (CSF) concentrations of amyloid-β (Aβ), total tau (t-tau), and phosphorylated proteins are associated with different clinical progression in Alzheimer’s disease (AD). We enrolled forty newly diagnosed AD patients, who underwent lumbar puncture, carried out a K-means cluster analysis based on CSF biomarkers levels, resulting two patient groups: Cluster 1 showed relatively high levels Aβ low tau; 2 tau. Cortical plasticity was tested using the intermittent continuous theta...

10.3233/jad-150813 article EN Journal of Alzheimer s Disease 2016-01-22

Background: Mechanisms of cortical plasticity have been recently investigated in Alzheimer’s disease (AD) patients with transcranial magnetic stimulation protocols showing a clear impairment long-term potentiation (LTP) cortical-like mechanisms. Objective: We aimed to investigate mechanisms cortico-cortical spike-timing dependent (STDP) AD investigating the connections between posterior parietal cortex (PPC) and primary motor (M1). Methods: used paired associative (cc-PAS) protocol...

10.3233/jad-180503 article EN Journal of Alzheimer s Disease 2018-10-22

<h3>Importance</h3> Impairment of dopaminergic transmission may contribute to cognitive dysfunction in Alzheimer disease (AD). <h3>Objective</h3> To investigate whether therapy with agonists affect functions patients AD. <h3>Design, Setting, and Participants</h3> This phase 2, monocentric, randomized, double-blind, placebo-controlled trial was conducted Italy. Patients mild moderate AD were enrolled between September 1, 2017, December 31, 2018. Data analyzed from July 1 2019....

10.1001/jamanetworkopen.2020.10372 article EN cc-by-nc-nd JAMA Network Open 2020-07-15

Short latency afferent inhibition (SAI) is a paired-pulse transcranial magnetic stimulation (TMS) protocol that consists in the of motor evoked potentials (MEPs) by sensory impulses. SAI thought to be mediated cholinergic projections over M1 and can considered putative marker central activity. It known memory processes are regulated acetylcholine. Nonetheless, influence tasks on has not been investigated. Here we tested changes circuits healthy subjects performing computerized non-verbal...

10.1111/ejn.13588 article EN European Journal of Neuroscience 2017-04-26
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