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  1. Article ; Online: Progressive supranuclear palsy phenotype as an atypical clinical presentation of Creutzfeldt-Jakob disease: A case report and review of the literature.

    Costanzo, Matteo / Aiello, Flavia / Poleggi, Anna / Li Voti, Pietro / Fabbrini, Giovanni / Belvisi, Daniele

    Clinical parkinsonism & related disorders

    2024  Volume 10, Page(s) 100247

    Abstract: Creutzfeldt-Jakob disease (CJD) is a rare, rapidly progressive neurodegenerative disorder, characterized by the accumulation of abnormal prion proteins in the brain. While CJD has some typical clinical features, its presentation can be quite ... ...

    Abstract Creutzfeldt-Jakob disease (CJD) is a rare, rapidly progressive neurodegenerative disorder, characterized by the accumulation of abnormal prion proteins in the brain. While CJD has some typical clinical features, its presentation can be quite heterogeneous, particularly in the early stages of the disease, posing challenges in diagnosis. Atypical manifestations of CJD can mimic various neurodegenerative disorders, including atypical parkinsonisms. In this case report, we present an 81-year-old man who exhibited an atypical clinical presentation of sporadic CJD, initially resembling progressive supranuclear palsy (PSP). The patient presented with symmetric parkinsonism, postural instability, and ocular motor dysfunction, accompanied by rapid clinical deterioration. Alongside the case report, we also provide a review of the literature on atypical presentations of CJD as PSP, highlighting the importance of recognizing these manifestations in clinical practice.
    Language English
    Publishing date 2024-03-05
    Publishing country England
    Document type Case Reports
    ISSN 2590-1125
    ISSN (online) 2590-1125
    DOI 10.1016/j.prdoa.2024.100247
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  2. Book: Lessico medico italiano

    Benigno, Pietro / Li Voti, Pietro

    1999  

    Author's details P. Benigno ; P. Li Voti
    Keywords Medicine
    Language Italian
    Size XII, 2322 S.
    Publisher CG Ed. Medico Scientifiche
    Publishing place Torino
    Publishing country Italy
    Document type Book
    HBZ-ID HT013347657
    ISBN 88-7110-065-4 ; 978-88-7110-065-4
    Database Catalogue ZB MED Medicine, Health

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    2002 A 3654 order for loan Magazin

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  3. Article: Voluntary Movement Takes Shape: The Link Between Movement Focusing and Sensory Input Gating.

    Belvisi, Daniele / Conte, Antonella / Cortese, Francesca Natalia / Tartaglia, Matteo / Manzo, Nicoletta / Li Voti, Pietro / Suppa, Antonio / Berardelli, Alfredo

    Frontiers in human neuroscience

    2018  Volume 12, Page(s) 330

    Abstract: The aim of the study was to investigate the relationship between motor surround inhibition (mSI) and the modulation of somatosensory temporal discrimination threshold (STDT) induced by voluntary movement. Seventeen healthy volunteers participated in the ... ...

    Abstract The aim of the study was to investigate the relationship between motor surround inhibition (mSI) and the modulation of somatosensory temporal discrimination threshold (STDT) induced by voluntary movement. Seventeen healthy volunteers participated in the study. To assess mSI, we delivered transcranial magnetic stimulation (TMS) single pulses to record motor evoked potentials (MEPs) from the right abductor digiti minimi (ADM; "surround muscle") during brief right little finger flexion. mSI was expressed as the ratio of ADM MEP amplitude during movement to MEP amplitude at rest. We preliminarily measured STDT values by assessing the shortest interval at which subjects were able to recognize a pair of electric stimuli, delivered over the volar surface of the right little finger, as separate in time. We then evaluated the STDT by using the same motor task used for mSI. mSI and STDT modulation were evaluated at the same time points during movement. mSI and STDT modulation displayed similar time-dependent changes during index finger movement. In both cases, the modulation was maximally present at the onset of the movement and gradually vanished over about 200 ms. Our study provides the first neurophysiological evidence about the relationship between mSI and tactile-motor integration during movement execution.
    Language English
    Publishing date 2018-08-17
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2425477-0
    ISSN 1662-5161
    ISSN 1662-5161
    DOI 10.3389/fnhum.2018.00330
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  4. Article ; Online: Somatosensory temporal discrimination in Parkinson's disease, dystonia and essential tremor: Pathophysiological and clinical implications.

    Conte, Antonella / Ferrazzano, Gina / Belvisi, Daniele / Manzo, Nicoletta / Battista, Emanuele / Li Voti, Pietro / Nardella, Andrea / Fabbrini, Giovanni / Berardelli, Alfredo

    Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology

    2018  Volume 129, Issue 9, Page(s) 1849–1853

    Abstract: Objective: To investigate whether changes in the somatosensory temporal discrimination threshold (STDT) in Parkinson's disease (PD) and dystonia reflect the involvement of specific neural structures or mechanisms related to tremor, and whether the STDT ... ...

    Abstract Objective: To investigate whether changes in the somatosensory temporal discrimination threshold (STDT) in Parkinson's disease (PD) and dystonia reflect the involvement of specific neural structures or mechanisms related to tremor, and whether the STDT can discriminate patients with PD, dystonia or essential tremor (ET).
    Methods: We tested STDT in 223 patients with PD, dystonia and ET and compared STDT values in patients with PD and dystonia with tremor with those of PD and CD without tremor. Data were compared with those of age-matched healthy subjects.
    Results: STDT values were high in patients with dystonia and PD but normal in ET. In PD, STDT values were similar in patients with resting or postural/action tremor and in those without tremor. In dystonia, STDT values were higher in patients with tremor than in those without tremor. The ROC curve showed that STDT discriminates tremor in dystonia from ET.
    Conclusions: In PD, STDT changes likely reflect basal ganglia abnormalities and are unrelated to tremor mechanisms. In dystonia, the primary somatosensory cortex and cerebellum play an additional role.
    Significance: STDT provides information on the pathophysiological mechanisms of patients with movement disorders and may be used to differentiate patients with dystonia and tremor from those with tremor due to ET.
    MeSH term(s) Aged ; Dystonia/physiopathology ; Dystonic Disorders/physiopathology ; Essential Tremor/physiopathology ; Evoked Potentials, Somatosensory/physiology ; Female ; Humans ; Male ; Middle Aged ; Parkinson Disease/physiopathology ; Physical Stimulation ; Sensory Thresholds/physiology ; Touch Perception/physiology
    Language English
    Publishing date 2018-06-27
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1463630-x
    ISSN 1872-8952 ; 0921-884X ; 1388-2457
    ISSN (online) 1872-8952
    ISSN 0921-884X ; 1388-2457
    DOI 10.1016/j.clinph.2018.05.024
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  5. Article ; Online: Reversal of Practice-related Effects on Corticospinal Excitability has no Immediate Effect on Behavioral Outcome.

    Bologna, Matteo / Rocchi, Lorenzo / Paparella, Giulia / Nardella, Andrea / Li Voti, Pietro / Conte, Antonella / Kojovic, Maja / Rothwell, John C / Berardelli, Alfredo

    Brain stimulation

    2015  Volume 8, Issue 3, Page(s) 603–612

    Abstract: Background: Motor training usually increases the excitability of corticospinal outputs to the trained muscles. However, it is uncertain to what extent the change in excitability is a critical component of behavioral learning or whether it is a non- ... ...

    Abstract Background: Motor training usually increases the excitability of corticospinal outputs to the trained muscles. However, it is uncertain to what extent the change in excitability is a critical component of behavioral learning or whether it is a non-specific side effect.
    Objective/hypothesis: We used a depotentiation protocol to abolish the training-induced increase of corticospinal excitability and tested whether this had any immediate effect on the improved motor performance.
    Methods: We used an index finger abduction task in which behavioral improvement is known to be associated with M1 excitability changes as monitored by the amplitude of motor-evoked potentials produced by single-pulse transcranial magnetic stimulation (TMS). These effects could be reversed by a depotentiation protocol using a short form of continuous theta-burst stimulation (cTBS150). Participants underwent three experimental interventions: 'motor training', 'motor training plus cTBS150' and 'cTBS150'. M1 excitability and TMS-evoked finger movements were assessed before the experimental interventions and 5 min, 15 min, and 30 min thereafter. Motor retention was tested 45 min after the experimental interventions.
    Results: During training, acceleration of the practiced movement improved. At the end of training, M1 excitability and the acceleration of TMS-evoked index finger movements in the direction of training had increased and the enhanced performance was retained when tested 45 min later. The depotentiation protocol, delivered immediately after the end of training, reversed the excitability changes in M1 but did not affect the acceleration of the TMS-evoked finger movement nor the retention of performance. The depotentiation protocol alone did not modify M1 excitability.
    Conclusions: The present study indicates that in the short term, increases in corticospinal excitability are not related to immediate changes in behavioral motor outcome.
    MeSH term(s) Adult ; Electromyography ; Evoked Potentials, Motor/physiology ; Female ; Fingers/physiology ; Humans ; Learning/physiology ; Long-Term Synaptic Depression/physiology ; Male ; Motor Cortex/physiology ; Motor Skills/physiology ; Movement/physiology ; Muscle, Skeletal/physiology ; Pyramidal Tracts/physiology ; Theta Rhythm ; Time Factors ; Transcranial Magnetic Stimulation ; Young Adult
    Language English
    Publishing date 2015-01-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2394410-9
    ISSN 1876-4754 ; 1935-861X
    ISSN (online) 1876-4754
    ISSN 1935-861X
    DOI 10.1016/j.brs.2015.01.405
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  6. Article ; Online: Transcranial direct current stimulation modulates motor responses evoked by repetitive transcranial magnetic stimulation.

    Cambieri, Chiara / Scelzo, Emma / Li Voti, Pietro / Priori, Alberto / Accornero, Neri / Inghilleri, Maurizio

    Neuroscience letters

    2012  Volume 522, Issue 2, Page(s) 167–171

    Abstract: Introduction: Repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS) are non-invasive techniques able to induce changes in corticospinal excitability. In this study, we combined rTMS and tDCS to understand ...

    Abstract Introduction: Repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS) are non-invasive techniques able to induce changes in corticospinal excitability. In this study, we combined rTMS and tDCS to understand possible interactions between the two techniques, and investigate whether they are polarity dependent.
    Materials and methods: Eleven healthy subjects participated in the study. Each patient underwent both anodal and cathodal conditioning tDCS in two separate sessions; brief 5 Hz-rTMS trains were delivered over the primary motor cortex at an intensity of 120% the resting motor threshold (RMT) before tDCS (T0), immediately after (T1) and 10 min after current offset (T2). We then analysed changes induced by cathodal and anodal tDCS on TMS variables.
    Results: Our results showed that in both anodal and cathodal sessions, the motor evoked potential (MEP) amplitude increased significantly in size before stimulation (T0). Conversely, after anodal tDCS, the MEP facilitation measured at T1 and T2 was absent, whereas after cathodal tDCS it was preserved.
    Conclusions: Our findings provide new direct neurophysiological evidence that tDCS influences primary motor cortex excitability.
    MeSH term(s) Adult ; Electromyography ; Evoked Potentials, Motor ; Female ; Humans ; Male ; Motor Cortex/physiology ; Muscle, Skeletal/innervation ; Muscle, Skeletal/physiology ; Transcranial Magnetic Stimulation
    Language English
    Publishing date 2012-08-01
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 194929-9
    ISSN 1872-7972 ; 0304-3940
    ISSN (online) 1872-7972
    ISSN 0304-3940
    DOI 10.1016/j.neulet.2012.06.033
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  7. Article ; Online: Primary somatosensory cortical plasticity and tactile temporal discrimination in focal hand dystonia.

    Conte, Antonella / Rocchi, Lorenzo / Ferrazzano, Gina / Leodori, Giorgio / Bologna, Matteo / Li Voti, Pietro / Nardella, Andrea / Berardelli, Alfredo

    Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology

    2014  Volume 125, Issue 3, Page(s) 537–543

    Abstract: Objective: To investigate whether theta burst stimulation (TBS) applied over primary somatosensory cortex (S1) modulates somatosensory temporal discrimination threshold (STDT) and writing performances in patients with focal hand dystonia (FHD).: ... ...

    Abstract Objective: To investigate whether theta burst stimulation (TBS) applied over primary somatosensory cortex (S1) modulates somatosensory temporal discrimination threshold (STDT) and writing performances in patients with focal hand dystonia (FHD).
    Methods: Twelve patients with FHD underwent STDT testing and writing tasks before and after intermittent, continuous, or sham TBS (iTBS, cTBS, sham TBS) over S1 contralateral to the affected hand. Twelve healthy subjects underwent iTBS and cTBS over S1 and STDT values were tested on the right hand before and after TBS.
    Results: Baseline STDT values were higher in patients than in healthy subjects on both the affected and unaffected hand. In patients and healthy subjects iTBS decreased, whereas cTBS increased STDT values and did so to a similar extent in both groups. In patients, although STDT values decreased after iTBS, they did not normalize. S1 modulation did not improve the writing performance.
    Conclusions: In patients, S1 responds normally to protocols inducing homotopic synaptic plasticity. The inhibitory interneuron activity responsible for STDT is altered.
    Significance: The pathophysiological mechanisms underlying abnormal temporal discrimination differ from those responsible for motor symptoms in FHD.
    MeSH term(s) Adult ; Aged ; Dystonic Disorders/physiopathology ; Female ; Hand/physiopathology ; Humans ; Male ; Middle Aged ; Neuronal Plasticity ; Somatosensory Cortex/physiopathology ; Temporal Lobe/physiopathology ; Touch Perception ; Transcranial Magnetic Stimulation/methods
    Language English
    Publishing date 2014-03
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1463630-x
    ISSN 1872-8952 ; 0921-884X ; 1388-2457
    ISSN (online) 1872-8952
    ISSN 0921-884X ; 1388-2457
    DOI 10.1016/j.clinph.2013.08.006
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  8. Article ; Online: Short-term and long-term plasticity interaction in human primary motor cortex.

    Iezzi, Ennio / Suppa, Antonio / Conte, Antonella / Li Voti, Pietro / Bologna, Matteo / Berardelli, Alfredo

    The European journal of neuroscience

    2011  Volume 33, Issue 10, Page(s) 1908–1915

    Abstract: Repetitive transcranial magnetic stimulation (rTMS) over primary motor cortex (M1) elicits changes in motor evoked potential (MEP) size thought to reflect short- and long-term forms of synaptic plasticity, resembling short-term potentiation (STP) and ... ...

    Abstract Repetitive transcranial magnetic stimulation (rTMS) over primary motor cortex (M1) elicits changes in motor evoked potential (MEP) size thought to reflect short- and long-term forms of synaptic plasticity, resembling short-term potentiation (STP) and long-term potentiation/depression (LTP/LTD) observed in animal experiments. We designed this study in healthy humans to investigate whether STP as elicited by 5-Hz rTMS interferes with LTP/LTD-like plasticity induced by intermittent and continuous theta-burst stimulation (iTBS and cTBS). The effects induced by 5-Hz rTMS and iTBS/cTBS were indexed as changes in MEP size. We separately evaluated changes induced by 5-Hz rTMS, iTBS and cTBS applied alone and those induced by iTBS and cTBS delivered after priming 5-Hz rTMS. Interactions between 5-Hz rTMS and iTBS/cTBS were investigated under several experimental conditions by delivering 5-Hz rTMS at suprathreshold and subthreshold intensity, allowing 1 and 5 min intervals to elapse between 5-Hz rTMS and TBS, and delivering one and ten 5-Hz rTMS trains. We also investigated whether 5-Hz rTMS induces changes in intracortical excitability tested with paired-pulse transcranial magnetic stimulation. When given alone, 5-Hz rTMS induced short-lasting and iTBS/cTBS induced long-lasting changes in MEP amplitudes. When M1 was primed with 10 suprathreshold 5-Hz rTMS trains at 1 min before iTBS or cTBS, the iTBS/cTBS-induced after-effects disappeared. The 5-Hz rTMS left intracortical excitability unchanged. We suggest that STP elicited by suprathreshold 5-Hz rTMS abolishes iTBS/cTBS-induced LTP/LTD-like plasticity through non-homeostatic metaplasticity mechanisms. Our study provides new information on interactions between short-term and long-term rTMS-induced plasticity in human M1.
    MeSH term(s) Adult ; Animals ; Evoked Potentials, Motor/physiology ; Female ; Humans ; Male ; Motor Cortex/physiology ; Neuronal Plasticity/physiology ; Random Allocation ; Transcranial Magnetic Stimulation/methods
    Language English
    Publishing date 2011-05
    Publishing country France
    Document type Journal Article
    ZDB-ID 645180-9
    ISSN 1460-9568 ; 0953-816X
    ISSN (online) 1460-9568
    ISSN 0953-816X
    DOI 10.1111/j.1460-9568.2011.07674.x
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  9. Article ; Online: Cerebellar continuous theta-burst stimulation affects motor learning of voluntary arm movements in humans.

    Li Voti, Pietro / Conte, Antonella / Rocchi, Lorenzo / Bologna, Matteo / Khan, Nashaba / Leodori, Giorgio / Berardelli, Alfredo

    The European journal of neuroscience

    2014  Volume 39, Issue 1, Page(s) 124–131

    Abstract: In this study we investigated in healthy subjects whether continuous theta-burst stimulation (cTBS) over the lateral cerebellum alters motor practice and retention phases during ipsilateral index finger and arm reaching movements. In 12 healthy subjects ... ...

    Abstract In this study we investigated in healthy subjects whether continuous theta-burst stimulation (cTBS) over the lateral cerebellum alters motor practice and retention phases during ipsilateral index finger and arm reaching movements. In 12 healthy subjects we delivered cTBS before repeated index finger abductions or arm reaching movements differing in complexity (reaching-to-grasp and reaching-to-point). We evaluated kinematic variables for index finger and arm reaching movements and changes in primary motor cortex (M1) activity tested with transcranial magnetic stimulation. Peak acceleration increased during motor practice for index finger abductions and reaching-to-grasp movements and persisted during motor retention. Peak acceleration decreased during motor practice for reaching-to-point movements and the decrease remained during motor retention. Cerebellar cTBS left the changes in peak acceleration during motor practice for index finger abductions and reaching-to-grasp arm movements unchanged but reduced peak acceleration at motor retention. Cerebellar cTBS prevented the decrease in peak acceleration for reaching-to-point movements during motor practice and at motor retention. Index finger abductions and arm reaching movements increased M1 excitability. Cerebellar cTBS decreased the motor evoked potential (MEP) facilitation induced by index finger movements, but increased the MEP facilitation after reaching-to-grasp and reaching-to-point movements. Cerebellar stimulation prevents motor retention for index finger abductions, reaching-to-grasp and reaching-to-point movements and degrades motor practice only for reaching-to-point movements. Cerebellar cTBS alters practice-related changes in M1 excitability depending on how intensely the cerebellum contributes to the task. Changes in M1 excitability reflect mechanisms of homeostatic plasticity elicited by the interaction of an 'exogenous' (cTBS-induced) and an 'endogenous' (motor practice-induced) plasticity-inducing protocol.
    MeSH term(s) Adult ; Arm/innervation ; Arm/physiology ; Biomechanical Phenomena ; Cerebellum/physiology ; Female ; Fingers/innervation ; Fingers/physiology ; Hand Strength ; Humans ; Learning ; Male ; Motor Skills ; Muscle Contraction ; Theta Rhythm ; Time Factors ; Transcranial Magnetic Stimulation
    Language English
    Publishing date 2014-01
    Publishing country France
    Document type Journal Article
    ZDB-ID 645180-9
    ISSN 1460-9568 ; 0953-816X
    ISSN (online) 1460-9568
    ISSN 0953-816X
    DOI 10.1111/ejn.12391
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  10. Article: Visual evoked potentials modulation during direct current cortical polarization.

    Accornero, Neri / Li Voti, Pietro / La Riccia, Maurizio / Gregori, Bruno

    Experimental brain research

    2007  Volume 178, Issue 2, Page(s) 261–266

    Abstract: Transcranial direct current stimulation (tDCS) at low intensity induces changes in cortical excitability that persist after polarization ends. The effects of anodal and cathodal polarization remain controversial. We studied changes in visual evoked ... ...

    Abstract Transcranial direct current stimulation (tDCS) at low intensity induces changes in cortical excitability that persist after polarization ends. The effects of anodal and cathodal polarization remain controversial. We studied changes in visual evoked potentials (VEPs) during and after anodal and cathodal tDCS by applying, in healthy volunteers, 1 mA polarization through surface electrodes placed over the occipital scalp (polarizing) and over the anterior or posterior neck-base (reference). We compared tDCS applied at two durations, 3 and 10 min and both polarities. We assessed VEP-P100 latencies and amplitudes in response to pattern-reversal checkerboard stimuli before, during, and after polarization. Anodal polarization reduced VEP-P100 amplitude whereas cathodal polarization significantly increased amplitude but both polarities left latency statistically unchanged. These changes persisted for some minutes after polarization ended depending on the duration of tDCS and on the contrast level of visual stimuli. tDCS-induced changes in VEPs seem to depend on the duration of polarization and type of visual stimuli used. The effects induced on visual cortical neurones during polarization are more consistent than the aftereffects. Studying these changes during polarization may therefore improve our understanding of these phenomena.
    MeSH term(s) Adult ; Analysis of Variance ; Electric Stimulation/methods ; Electromyography/methods ; Evoked Potentials, Visual/physiology ; Evoked Potentials, Visual/radiation effects ; Female ; Humans ; Male ; Middle Aged ; Reaction Time/radiation effects ; Time Factors ; Visual Cortex/physiology ; Visual Cortex/radiation effects
    Language English
    Publishing date 2007-04
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1201-4
    ISSN 1432-1106 ; 0014-4819
    ISSN (online) 1432-1106
    ISSN 0014-4819
    DOI 10.1007/s00221-006-0733-y
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