
Stephane PerreyUniversité de Montpellier | UM1 · Faculté des Sciences du Sport (STAPS)
Stephane Perrey
PhD
About
405
Publications
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Introduction
My current researches are in the centre of issues, which have for objectives to identify, quantify and explain mechanisms responsible for changes of the motor function in humans. Especially, functional investigation of the brain during various motor tasks involving fatigue is realized by using electrophysiological and near-infrared spectroscopy signals.
Additional affiliations
September 2010 - March 2017
September 2012 - June 2015
September 2012 - January 2019
Publications
Publications (405)
Recently, interest has been growing to understand the underlying dynamic directional relationship between simultaneously activated regions of the brain during motor task performance. Such directionality analysis (or effective connectivity analysis), based on non-invasive electrophysiological (electroencephalography-EEG) and hemodynamic (functional...
The emergence of the first Fitness-Fatigue impulse responses models (FFMs) have allowed the sport science community to investigate relationships between the effects of training and performance. In the models, athletic performance is described by first order transfer functions which represent Fitness and Fatigue antagonistic responses to training. O...
It has been proposed that inter-brain synchrony (IBS) may help to elucidate the neural mechanisms underpinning teamwork. As hyperscanning studies have provided abundant findings on IBS in team environments, the current review aims to synthesize the findings of hyperscanning studies in a way that is relevant to the teamwork research. A systematic re...
Background
In the last 5 years since our last systematic review, a significant number of articles have been published on the technical aspects of muscle near-infrared spectroscopy (NIRS), the interpretation of the signals and the benefits of using the NIRS technique to measure the physiological status of muscles and to determine the workload of wor...
Eccentric, compared to concentric exercise, is proposed to involve different neuro‐motor processing strategies and a higher level of mental demand. This study compared eccentric and concentric cycling at matched perceived effort and torque for the mental demand and related‐cortical activation patterns. Nineteen men (30 ± 6 years) performed four dif...
Background: Musculoskeletal injuries can have far-reaching consequences on brain function, leading to reduced motor control, altered movement patterns, increased inhibition of the injured muscle and joint, and changes in neuroplasticity. These deficits, controlled in part by the central nervous system (CNS), might be alleviated with an appropriate...
Background: Objective training load (TL) indexes used in resistance training lack physiological significance. This study was aimed to provide a muscle physiology-based approach for quantifying TL in resistance exercises (REs). Methods: Following individual torque–velocity profiling, fifteen participants (11 healthy males, stature: 178.36 ± 3.95 cm,...
Background
Following a stroke, brain activation reorganisation, movement compensatory strategies, motor performance and their evolution through rehabilitation are matters of importance for clinicians. Two non-invasive neuroimaging methods allow for recording task-related brain activation: functional near-infrared spectroscopy (fNIRS) and electroenc...
Background: Objective training load indexes (TL) used in resistance training lack of physiological significance. This study aimed to provide a muscle physiology-based approach for quantifying TL in resistance exercises (RE). Methods: Following individual torque-velocity profiling, fifteen participants performed isokinetic leg extension exercise ses...
Editorial on the Research Topic Muscle oxygenation and vascular adaptations in sports performance and rehabilitation Technological advancements in sports and health have enabled the indirect (and non-invasive) measurement of metabolism, blood flow, and oxygenation at the muscle level, during exercise. This has significantly enhanced our understandi...
Cervistab is an electro-pneumatic device that produces flexion push-loading events in an ecological rugby position (i.e. similar to on-pitch position) to assess neck extensors muscle response to a flexion perturbation. This response is important for preventing head/neck injuries in Rugby, however there is a clear lack of validated devices in the li...
Psychological theories suppose that teamwork evolves over a task episode, but this hypothesis cannot be tested using questionnaires. This study used fNIRS hyperscanning methods to assess teamwork by examining the temporal course of interbrain synchrony (IBS) in the prefrontal cortex and temporoparietal junction over a 30-minute task in 40 dyads.
Call for Letters–Viewpoint: Technological Advances in Elite Sport: Where Does One Draw the Line?
The use of biofeedback technology in training, but not in competition, strikes a balance between harnessing innova- tion for performance enhancement and maintaining the in- tegrity and spirit of sport.
We employ Kuramoto model to assess the presence of synchronization in individuals who fulfill a cooperation task. Our input data is a couple of signals obtained from functional Near-Infrared Spectroscopy Data Acquisition and Pre-processing technology that is used to capture the brain activity of an individual by measuring the oxyhemoglobin (HbO) le...
Over recent decades, neuroimaging tools, particularly electroencephalography (EEG), have revolutionized our understanding of the brain and its functions. EEG is extensively used in traditional brain-computer interface (BCI) systems due to its low cost, non-invasiveness, and high temporal resolution. This makes it invaluable for identifying differen...
This study aimed to evaluate the between-session test retest reliability of Cervistab-derived measures (i.e. mechanical muscle latency and rate of force development) after inducing controlled head impact.
We investigate a method to asses brain synchronization in individuals who fulfill a cooperation task. Our input is a couple of signals from functional Near-Infrared Spectroscopy Data Acquisition and Pre-processing technology that is used to capture the brain activity of an individual by measuring the oxyhemoglobin (HbO) level. Then, we use the visi...
En essayant d'être multitâche, nous reportons en réalité notre attention d'une tâche à l'autre rapidement, ce qui peut mener à une surcharge cognitive.
Une définition universelle qui peine à émerger.
Comment étudier la charge mentale ? Des réponses comportementales aux marqueurs neurophysiologiques.
Dans le cerveau, le cortex préfrontal est un témo...
The investigation of muscle oxygenation through near-infrared spectroscopy (NIRS) has gained significant importance in the field of sports sciences. This is mainly due to its ability to non-invasively provide information on the energy metabolism of skeletal muscle, fatigue response, and health status of athletes. Additionally, during injury rehabil...
The aim of this opinion article is to highlight the potential of actually integrating the use of complementary neuroimaging (functional near-infrared spectroscopy - electroencephalography) and neuromodulation (transcranial current stimulation) techniques with objective behavioural performance metrics (force, velocity) during strength training.
Background
Following a stroke, brain activation reorganisation, movement compensatory strategies, motor performance and their evolution through rehabilitation are matters of importance for clinicians. Two non-invasive neuroimaging methods allow for recording task-related brain activation: functional near-infrared spectroscopy (fNIRS) and electroenc...
This symposium addresses the contributions and impacts of digital tools in high-level sport via combined perspectives in physiology, biomechanics, communication systems/electronics and computer science/data sciences.
Notio is a device based on a wind sensor which offers estimates of the CdA (drag coefficient multiplied by the area) of the pair cyclist and bike. Notio is used with a specific analysis software, which computes CdA estimates after a ride. The Aeroscale Company proposes a half-day service with their own wind sensor and experimental protocol, to also...
Introduction
Dementia is a neurological disorder associated with aging that can cause a loss of cognitive functions, impacting daily life. Alzheimer's disease (AD) is the most common cause of dementia, accounting for 50–70% of cases, while frontotemporal dementia (FTD) affects social skills and personality. Electroencephalography (EEG) provides an...
The emergence of consciousness is one of biology's biggest mysteries. During the last two decades, a major effort has been made to identify the neural correlates of consciousness, but in comparison, little is known about the physiological mechanisms underlying first-person subjective experience. Attention is considered the gateway of information to...
Douches et bains glacés n'ont pas que des avantages après l'effort
Frankfurt 2023 - Expand the horizon of Near Infrared Spectroscopy
KeyNote: Evaluating brain functioning with f/NIRS in sports: opportunities and challenges
Objectives
Evaluate the ability of predicting the ratings of perceived exertion (RPE) from the external load variables in professional soccer players through a chronological perspective (i.e., past features values are considered additional features) through machine learning models by considering the playing position.
Design
Prospective cohort stud...
This Frontiers in Human Neuroscience: Brain Imaging and Stimulation Research Topic includes six contributions (four original and two case reports) from a total of 28 co-authors. Efforts were centered around the effects of tCS when applied to M1 or cerebellum to improve upper- or lower-extremity locomotor or musculoskeletal functions in healthy indi...
L'analyse des données est de plus en plus présente dans le football
https://theconversation.com/football-quand-les-donnees-se-mettent-au-service-de-la-performance-199318
Physical neuroergonomics can sketch some potentially fruitful new directions for crossing researches in biomechanics, neurophysiology, physiology, sport sciences, data science, neuroimaging and neurosciences reflecting physical processes. The first grand challenge is focused on the use of small, ubiquitous sensors and/or innovative methods for perf...
While the importance of physical abilities is noncontested to perform in elite sport, more focus has recently been turned toward cognitive processes involved in sport performance. Practicing any sport requires a high demand of cognitive functioning including, but not limited to, decision-making, processing speed, working memory, perceptual processi...
Healthy aging leads to poorer performance in upper limb (UL) daily living movements. Understanding the neural correlates linked with UL functional movements may help to better understand how healthy aging affects motor control. Two non-invasive neuroimaging methods allow for monitoring the movement-related brain activity: functional near-infrared s...
Unexpected external perturbation influences team performance through its coordination ability. Given the existence of brain rhythms synchronization in two individuals cooperating together, this study aimed at testing the effect of a perturbation on the neurophysiological coordination. Forty-two participants (21 dyads) divided in two groups (Control...
NIRS method presents a unique opportunity to measure brain functioning in a continuous, real-time, and nonintrusive manner for multiple neuroergonomics scenario, as encountered in sports. Sport is currently a suitable but not underlined and undefined applied domain for neuroergonomics. Current wearable NIRS monitors growing in availability and popu...
Eccentric, compared to concentric muscle contraction, is thought to be attributed to different strategies of neuro-motor processing and a higher level of mental demand. This study aimed to evaluate the mental demand and related-cortical activation patterns to eccentric and concentric cycling at matched perceived effort and torque. Nineteen healthy...
Background:
Transcranial direct current stimulation (tDCS) has emerged as a promising and feasible method to improve motor performance in healthy and clinical populations. However, the potential of tDCS to enhance sport-specific motor performance in athletes remains elusive.
Objective:
We aimed at analyzing the acute effects of a single anodal t...
The object of this study is to put forward uncertainty modeling associated with missing time series data imputation in a predictive context. We propose three imputation methods associated with uncertainty modeling. These methods are evaluated on a COVID-19 dataset out of which some values have been randomly removed. The dataset contains the numbers...
Purpose: Repeated-sprint training in hypoxia (RSH) leads to great improvements in anaerobic performance. However, there is no consensus about the optimal level of hypoxia that should be used during training to maximize subsequent performances. This study aimed to establish whether such an optimal altitude can be determined and whether pulse oxygen...
Personne, malheureusement, n'échappe à la fatigue. En bonne santé ou touchés par une pathologie chronique, simple quidam ou athlète de haut niveau, après une journée de travail intense, nous sommes tous confrontés à cette sensation de ne plus avoir les ressources suffisantes pour continuer à travailler, réfléchir, faire du sport…
In recent years, neuroscientists have been interested to the development of brain-computer interface (BCI) devices. Patients with motor disorders may benefit from BCIs as a means of communication and for the restoration of motor functions. Electroencephalography (EEG) is one of most used for evaluating the neuronal activity. In many computer vision...
Contribution to the field
We hosted a special research topic issue for Frontiers in Neuroergonomics that focused on brain mechanisms underpinning physical movement and exercise. In total, 8 papers were accepted totalling 31 authors that covered three main domains: 1) Methods to elucidate fine motor control, 2) Exercise-related brain adaptations, an...
This study aims to predict individual Acceleration-Velocity profiles (A-V) from Global Navigation Satellite System (GNSS) measurements in real-world situations. Data were collected from professional players in the Superleague division during a 1.5 season period (2019–2021). A baseline modeling performance was provided by time-series forecasting met...
This study aimed to assess the effect of transcranial random noise stimulation over behavioral performance in complex task training. Because of its implication in multitasking and complex tasks management, the right dorsolateral prefrontal cortex has been selected as the target for a focal stimulation during the training.
Forty participants have ra...
Synopsis:
Unexpected external perturbation influences team performance through its coordination ability. Given the existence of brain rhythms synchronization in two individuals cooperating together, this study aimed at testing the effect of a perturbation on the neurophysiological coordination. Forty-two participants (21 dyads) divided in two grou...
In recent years, neuroscientists have been interested to the development of brain-computer interface (BCI) devices. Patients with motor disorders may benefit from BCIs as a means of communication and for the restoration of motor functions. Electroencephalography (EEG) is one of most used for evaluating the neuronal activity. In many computer vision...
In post-stroke rehabilitation unit, upper limb (UL) function recovery is a subject of major interest to facilitate patient’s autonomy in everyday life. This recovery is deeply linked to plastic brain reorganisation. A better understanding of the brain-movement characteristics could help for guiding therapeutic interventions. Two neuro-imagery metho...
Background: Transcranial direct current stimulation (tDCS) has emerged as a promising and feasible method to improve motor performance in healthy and clinical populations. However, the potential of tDCS to enhance sport-specific motor performance in athletes remains elusive.
Objective: We aimed at analyzing the acute effects of a single anodal tDC...
Notre espèce est acclimatée à un monde placé sous le joug d'une gravité constante-en l'occurrence, une force d'accélération omniprésente née de l'attraction terrestre (l'unité de pesanteur terrestre, notée g, valant 9,81 m/s 2). Il existe toutefois des circonstances où notre corps est soumis à plus fort que la gravité terrestre classique… C'est là...
This study aims to predict individual Acceleration-Velocity profiles (A-V) from Global Navigation Satellite System (GNSS) measurements in real-world situations. Data were collected from professional players in the Superleague division during a 1.5 season period (2019-2021). A baseline modeling performance was provided by time-series forecasting met...
Appropriate training burden monitoring is still a challenge for the support staff, athletes, and coaches. Extensive research has been done in recent years that proposes several external and internal indicators. Among all measurements, the importance of cognitive factors has been indicated but has never been really considered in the training monitor...
Interest for neuromodulation, and transcranial random noise stimulation (tRNS) in particular, is growing. It concerns patients rehabilitation, but also healthy people who want or need to improve their cognitive and learning abilities. However, there is no consensus yet regarding the efficacy of tRNS on learning and performing a complex task. In par...
[This corrects the article DOI: 10.1371/journal.pcbi.1009386.].
Executive functions are important for successful accomplishment of walking tasks, particularly during a dual task. Over the past few years, several studies investigated prefrontal cortex activity under different walking conditions in older adults with functional near infrared spectroscopy (fNIRS). However, little is known about changes in dorsolate...
This study aims to provide a transferable methodology in the context of sport performance modelling, with a special focus to the generalisation of models. Data were collected from seven elite Short track speed skaters over a three months training period. In order to account for training load accumulation over sessions, cumulative responses to train...
Numerous studies have shown that working memory modulates every frequency band’s power in the human brain. Yet, the question of how the highly distributed working memory adapts to external demands remains unresolved. Here, we explored frequency band modulations underlying working memory load, taking executive control under account. We hypothesized...
Introduction
Parkinson’s disease (PD) leads to a progressive loss of locomotor automaticity. Consequently, PD patients rely more on executive resources for the control of gait, resulting in increased prefrontal activity while walking. Exercise-based training programs may improve automaticity of walking and reduce prefrontal activity in this populat...
Outline of my talk is focused on results based on the brain responses in the context of sport performances. Two sport categories are distinguished, namely, closed skill sports (CSS) and open skills sports (OSS); OSS (e.g., basketball, table tennis) require players to react in an unpredictable and changing externally paced environment while CSS are...
Background
After a stroke, 80% of the chronic patients have difficulties to use their paretic upper limb (UL) in activities of daily life (ADL) even after rehabilitation. Virtual reality therapy (VRT) and anodal transcranial direct current stimulation (tDCS) are two innovative methods that have shown independently to positively impact functional re...
Transcranial direct current stimulation (tDCS) has been shown to evoke hemodynamics response; however, the mechanisms have not been investigated systematically using systems biology approaches. Our study presents a grey-box linear model that was developed from a physiologically detailed multi-compartmental neurovascular unit model consisting of the...
BACKGROUND: Aerobatic pilots must withstand high and sudden acceleration forces (Gz) up to 10 Gz. The physiological consequences of such a succession of high and abrupt positive and negative Gz on the human body over time remain mostly unknown. This case report emphasizes changes in physiological factors such as cerebral oxygenation and heart rate...
In this study, we examined how changes in task difficulty was modulating functional brain activation and effective connectivity in some important brain areas involved in working memory (i.e., the medial and dorsolateral prefrontal cortex, mPFC and dlPFC).