Vinicius Cavassano Zampier , Luis Mochizuki , Victor Spiandor Beretta , Vinicius de Belli , Lilian Teresa Bucken Gobbi , Fabio Augusto Barbieri , Diego Orcioli-Silva
{"title":"Verbal arm swing instructions alter arm-leg interlimb coordination but not prefrontal cortex hemodynamics in people with Parkinson's disease","authors":"Vinicius Cavassano Zampier , Luis Mochizuki , Victor Spiandor Beretta , Vinicius de Belli , Lilian Teresa Bucken Gobbi , Fabio Augusto Barbieri , Diego Orcioli-Silva","doi":"10.1016/j.humov.2025.103367","DOIUrl":"10.1016/j.humov.2025.103367","url":null,"abstract":"<div><div>Verbal instructions related to the arm swing amplitude and velocity change step gait behavior in people with Parkinson's disease (PwPD) and neurotypical individuals. However, how verbal instructions related to upper limb act on interlimb coordination and prefrontal cortex activation are not yet known. Therefore, the aim of this study was to investigate the effects of the instructions to increase arm swing amplitude and velocity during walking on prefrontal cortex (PFC) hemodynamics and arm-leg interlimb coordination in PwPD and neurotypical individuals. Fifteen PwPD and 13 neurotypical individuals walked over a 26.8 m pathway under three experimental conditions: usual walking, walking with increased arm swing amplitude, and walking with increased arm swing velocity. Gait step parameters, continuous relative phase and latency between arm and leg movements, and PFC hemodynamics were calculated. ANOVA two-way (groups x conditions) showed that the verbal instructions to increase arm swing amplitude and velocity during walking improved gait step parameters and arm-leg interlimb coordination, without changing PFC hemodynamics. Specifically, verbal instructions increased average continuous relative phase (F<sub>2,52</sub> = 45.5; <em>p</em> < 0.001; ηp<sup>2</sup> = 0.63) and decreased the average relative phase variability (F<sub>2,52</sub> = 86.9; p < 0.001; ηp<sup>2</sup> = 0.77) in both groups and decreased PwPD latency (F<sub>2,52</sub> = 3.5; <em>p</em> = 0.03; ηp<sup>2</sup> = 0.19). Verbal instructions also increased stride length (F<sub>2,52</sub> = 27.7; <em>p</em> < 0.001; ηp<sup>2</sup> = 0.51) and velocity (F<sub>2,52</sub> = 46.6; p < 0.001; ηp<sup>2</sup> = 0.64) and decreased double support phase in both groups. These results allow us to speculate that the engagement of the motor areas to follow the instructions and perform the ensuing action could be related to preservation of some automaticity and it is possible that the participants do not need to use their cognitive resources by increasing PFC activity to process and do the action.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103367"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yukako Fukase , Ziheng Wang , So Endo , Haruki Momma , Ryoichi Nagatomi
{"title":"Imitation of complex whole-body sequence in profoundly hearing-impaired adolescents","authors":"Yukako Fukase , Ziheng Wang , So Endo , Haruki Momma , Ryoichi Nagatomi","doi":"10.1016/j.humov.2025.103364","DOIUrl":"10.1016/j.humov.2025.103364","url":null,"abstract":"<div><div>Many studies have identified specific visual advantages in deaf individuals. However, few studies have linked these advantages to motor learning. This study aimed to compare the differences in movement and learning processes between profoundly hearing-impaired (HI) and normal-hearing (NH) adolescents by capturing motions that imitate complex whole-body sequences. To analyze multiple parameters simultaneously in a time series and evaluate their similarity to the reference, we used a deep-learning strategy with an autoencoder for anomaly detection. In this study, anomaly detection indicated the difference between the reference and the participants. We set the threshold to 3σ. An analysis targeting the hands showed that HI had a significantly lower anomaly rate than NH in the first imitation; even when checking the trajectory, we found that all HI followed the same pattern as the reference dancer. Compared with NH, HI could capture and reproduce the motion characteristics of the reference in the first trial, especially in the hands, which broadens the perspective of motor instruction for HI adolescents.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103364"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Two sources of performance-stabilizing synergies: An experimental exploration using finger force production","authors":"Valters Abolins , Edgars Bernans , Mark L. Latash","doi":"10.1016/j.humov.2025.103369","DOIUrl":"10.1016/j.humov.2025.103369","url":null,"abstract":"<div><div>We explored the hypothesis on two sources of finger force variance in multi-finger accurate force production tasks, related to variability in the sharing of total force among finger forces and to sensory-based covariation of the finger forces. This hypothesis was explored within the space that did not affect task-specific performance variable (the uncontrolled manifold, UCM) and within the space that affected this variable (orthogonal to the UCM, ORT). Young, healthy subjects performed steady-state accurate total force production tasks with and without targets for the individual finger forces. These targets varied in size from 1.5% to 40% of the task total force level. The UCM hypothesis framework was used to quantify the two variance components, V<sub>UCM</sub> and V<sub>ORT</sub>, across trials and across 0.1-s samples selected from single 30-s trials at 1-s intervals. Across all conditions, V<sub>ORT</sub> was similar for the inter-trial and single-trial analyses and across the finger force target sizes. In contrast, V<sub>UCM</sub> (typically larger than V<sub>ORT</sub>) was smaller during the single-trial analyses compared to the inter-trial analyses. V<sub>UCM</sub> also decreased significantly with the drop in the target size for individual finger forces. We interpret these results as pointing at two sources of V<sub>UCM</sub>. First, variability in the sharing of total force between the individual finger forces, based on practice, that can be seen from the very beginning of trials. Second, negative covariation of finger forces along individual trials based on visual feedback and, potentially, on loops within the central nervous system. Combining single-trial and inter-trial analyses of variance can provide information on these two sources and turn into a tool to quantify impaired control of movement stability in neurological patients.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103369"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Noah Jacobson , Quinn Berleman-Paul , Madhur Mangalam , Damian G. Kelty-Stephen , Christopher Ralston
{"title":"Corrigendum to “Multifractality in postural sway supports quiet eye training in aiming tasks: A study of golf putting” Human Movement Science, 76 (2021) 102752","authors":"Noah Jacobson , Quinn Berleman-Paul , Madhur Mangalam , Damian G. Kelty-Stephen , Christopher Ralston","doi":"10.1016/j.humov.2025.103341","DOIUrl":"10.1016/j.humov.2025.103341","url":null,"abstract":"","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103341"},"PeriodicalIF":1.6,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143617800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ryota Takamido , Chiharu Suzuki , Jun Ota , Hiroki Nakamoto
{"title":"Understanding whole-body inter-personal dynamics between two players using neural granger causality as the explainable artificial intelligence","authors":"Ryota Takamido , Chiharu Suzuki , Jun Ota , Hiroki Nakamoto","doi":"10.1016/j.humov.2025.103366","DOIUrl":"10.1016/j.humov.2025.103366","url":null,"abstract":"<div><div>Understanding the dynamics of complex, whole-body interpersonal coordination behavior in humans is an important subject in behavioral science. However, due to the challenges of analyzing complex causal relationships among multiple body components with conventional techniques, this area remains underexplored. To address this issue, this study proposes a new analytical framework that attempts to understand the underlying causal structures behind each joint movement of individual players using neural Granger causality (NGC) as the explainable artificial intelligence (XAI). In the NGC analysis, causal relationships were defined as the size of the weight parameters of the first layer of a machine-learning model trained to predict the future state of a specific time-series variable. To verify this approach practically, we conducted an experiment with 16 pairs of expert baseball pitchers and batters, and input datasets with 27 joint resultant velocity (13 pitchers' and 14 batters' joints) were generated and used for model training. The results revealed that significant causal relations exist among intra- and inter-individual body components, such as “the batter's hands have a causal effect from pitcher's throwing arm.” Although the causality from the batters to the pitcher's body is significantly lower than that from the pitchers to the batter's body, it exhibits a significant correlation with the performance outcomes of batters (R<sup>2</sup> = 0.69). These results suggest the effectiveness of the NGC analysis for understanding whole-body inter-personal coordination dynamics and, more broadly, the XAI technique as a new approach for analyzing complex human behavior from a perspective different from conventional techniques.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103366"},"PeriodicalIF":1.6,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marijn S.J. Hafkamp, Remy Casanova, Reinoud J. Bootsma
{"title":"Interpersonal coordination in a ball-and-beam paradigm: Transfer of skill from solo action to joint action","authors":"Marijn S.J. Hafkamp, Remy Casanova, Reinoud J. Bootsma","doi":"10.1016/j.humov.2025.103365","DOIUrl":"10.1016/j.humov.2025.103365","url":null,"abstract":"<div><div>Interpersonal coordination is paramount to the success of a joint action. While the pattern formation process of interpersonal coordination is relatively well understood, models like HKB lack an ecological dimension that relates the motor pattern to the environment. We investigated this dimension in a two-step study using the ball-and-beam paradigm. Participants rolled a ball back-and-forth between two targets on a beam, by manipulating the beam inclination either individually or dyadically. In an (earlier reported) first step, 16 participants performed two solo action sessions of the task, allowing us to identify pertinent performance characteristics. Here, those participants were paired into 8 dyads to perform a joint action session, allowing us to assess the solo-to-joint transfer of those characteristics. Over blocks, dyads improved their performance by increasing the ball speed and accuracy. While the relative variability of the beam's inclination angle decreased, the range and the timing of the beam motion remained unchanged. Variables (indirectly) related to ball speed, such as the range and timing of the beam motion, were strongly propagated from solo to joint action, while the variables related to ball accuracy, like the beam variability, were only moderately transferred. Most dyads established an anti-phase mode of coordination, with a significant decrease in phase variability over blocks. We also observed significant asymmetries in the coordination. Dyad members with a better solo-action performance were more likely to lead the interaction. We concluded that interpersonal coordination in the ball-and-beam paradigm emerged from the interaction, while being constrained by the goal of the task.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103365"},"PeriodicalIF":1.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paolo De Blasiis , Ciro Ivan De Girolamo , Marta Trucillo , Allegra Fullin , Nicola Moccaldi , Pasquale Arpaia , Angelica Perna , Germano Guerra , Domenico Tafuri , Angela Lucariello
{"title":"Countermovement jump analysis: Effects of acoustic and visual stimuli on jump performance in volleyball players evaluated by inertial measurement unit","authors":"Paolo De Blasiis , Ciro Ivan De Girolamo , Marta Trucillo , Allegra Fullin , Nicola Moccaldi , Pasquale Arpaia , Angelica Perna , Germano Guerra , Domenico Tafuri , Angela Lucariello","doi":"10.1016/j.humov.2025.103363","DOIUrl":"10.1016/j.humov.2025.103363","url":null,"abstract":"<div><div>The ability to perform maximal vertical jumps (VJs) significantly affects athletic performance in several sports, such as volleyball, with a paucity of studies investigating the effects of different sensory stimuli on VJ performance. To the best of our knowledge, no study quantitatively assessed the variations of spatial-temporal and kinetic parameters during Countermovement Jump-Free Arms (CMJ-FA) execution in different acoustic and visual conditions.</div><div>The aim of the present study is to explore the effects of visual and acoustic stimuli, in conditions considered incentive and disincentive, on CMJ-FA performance via an Inertial Measurements Unit (IMU). Twenty male volleyball athletes were assessed across five sessions, each with 3 CMJ-FA repetitions, performed either without sensory stimulus (NS), with incentive (IAS) and disincentive (DAS) acoustic stimulus, and with incentive (IVS) and disincentive (DVS) visual stimulus. Spatial-temporal and four kinetic parameters were evaluated. Significant differences in disincentive conditions with respect to NS in time of flight phase and jump height were observed. Moreover, in DVS a trend of increase for Impact Index compared to NS was found. Instead, no significant variations were found in incentive conditions compared to NS. These findings highlighted the interference of disincentive conditions on jump performance; moreover, an increase of ground impact force during landing phase in DVS may predispose to muscle-skeletal lower limb injuries. These knowledges could be useful to the sports trainers for improving athletes' control, in order to desensitize them from disincentive conditions, keeping a good performance and decreasing the risk of injuries during the competition.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103363"},"PeriodicalIF":1.6,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Matthew J. Crossley , Christopher L. Hewitson , David M. Kaplan
{"title":"Differential impact of sensory uncertainty in blocked versus trial-interleaved contexts when feedforward and feedback processes co-occur","authors":"Matthew J. Crossley , Christopher L. Hewitson , David M. Kaplan","doi":"10.1016/j.humov.2025.103358","DOIUrl":"10.1016/j.humov.2025.103358","url":null,"abstract":"<div><div>Theories of human motor learning commonly assume that the degree to which movement plans are adjusted in response to movement errors scales with the precision of sensory feedback received regarding their success. However, support for such models has mainly come from experiments that limit the amount of correction that can occur within an ongoing movement. In contrast, we have recently shown that when this restriction is relaxed, and both within-movement and between-movement corrections co-occur, movement plans undergo large and abrupt changes that are strongly correlated with the degree of sensory uncertainty present on the previous trial and are insensitive to the magnitude and direction of the experienced movement error. Here, we show that the presence of these abrupt and error-insensitive changes are only observed when different levels of sensory uncertainty are interleaved pseudo-randomly on a trial-by-trial basis, and are absent when sensory uncertainty levels vary across blocks of trials. These results suggest that the co-occurrence of within-movement and between-movement corrections is not the only important aspect of our earlier study that challenged traditional models of motor learning under uncertainty.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103358"},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The use of motor imagery in 6–7-year-old children is not robust: Evidence from two motor imagery tasks","authors":"Satoshi Nobusako , Taeko Tsujimoto , Ayami Sakai , Teruyuki Yokomoto , Yusuke Nagakura , Nami Sakagami , Tomochika Fukunishi , Emiko Takata , Harumi Mouri , Michihiro Osumi , Akio Nakai , Shu Morioka","doi":"10.1016/j.humov.2025.103362","DOIUrl":"10.1016/j.humov.2025.103362","url":null,"abstract":"<div><div>Motor imagery (MI) is a dynamic cognitive process in which an individual mentally simulates a movement without an external demonstration of the actual movement. The ability of adults to use MI has been well documented, but the ability of children to use MI is less clear. The current study examined age-related differences in MI using two MI tasks, the hand laterality recognition (HLR) and bimanual motor (BM) tasks, in 6–13-year-old typically developing children. Biomechanical constraint effects in the HLR task and the ovalization index (OI) of the imagery condition and the imagery coupling effect in the BM task, among others, were quantitative indicators of the ability to use MI. Significant biomechanical constraint effects in the HLR task and significant imagery coupling effects in the BM task were not observed in 6–7-year-old children, but were evident in 8–13-year-old children, indicating that the use of MI in 6–7-year-old children is not robust in either MI task. There was significant shortening of correct reaction time and improvement of accuracy in the HLR task with increasing age, but there was no significant age difference or correlation with age in the imagery coupling effect in the BM task. Therefore, the results suggest that MI ability as measured by the HLR task shows age-related improvements between 6 and 13 years of age, whereas MI ability, as measured by the BM task, does not show significant age-related differences over the same period.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103362"},"PeriodicalIF":1.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ashwini Sansare , Hendrik Reimann , Barry Bodt , Maelyn Arcodia , Khushboo Verma , John Jeka , Samuel C.K. Lee
{"title":"Reliance on vision for walking balance is related to somatosensory function in individuals with and without cerebral palsy","authors":"Ashwini Sansare , Hendrik Reimann , Barry Bodt , Maelyn Arcodia , Khushboo Verma , John Jeka , Samuel C.K. Lee","doi":"10.1016/j.humov.2025.103361","DOIUrl":"10.1016/j.humov.2025.103361","url":null,"abstract":"<div><h3>Aim</h3><div>To investigate the relationship between somatosensory deficits, specifically ankle and hip joint position sense, two-point discrimination, and vibration on the (1) responses to visual perturbations during walking and (2) response improvements to visual perturbations while receiving a sensory-centric treatment, i.e., stochastic resonance (SR) stimulation, in individuals with and without cerebral palsy (CP).</div></div><div><h3>Methods</h3><div>Twenty-eight individuals (14 CP, 14 age-and sex-matched controls) walked in a virtual reality cave while receiving visual perturbations. We applied SR to the ankle and hip joints. Data analysis consisted of regression analyses for each sensory test as well as multiple regression analysis (MRA) using all four sensory tests as predictors with the responses to visual perturbation and the improvements in the responses when SR is applied as outcomes.</div></div><div><h3>Results</h3><div>We found significant and strong correlations between performance on sensory tests and the responses to visual perturbations, and improvements in the responses with SR. Only one predictor could be entered into the MRA, indicating that performance on any of the sensory tests could predict the responses to visual perturbation and the improvements with SR.</div></div><div><h3>Interpretation</h3><div>Individuals with sensory deficits are more responsive to sensory-centric interventions. This study is an initial step in identifying potential “responders” to sensory therapies in individuals with CP.</div></div>","PeriodicalId":55046,"journal":{"name":"Human Movement Science","volume":"101 ","pages":"Article 103361"},"PeriodicalIF":1.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}