Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-03-17DOI: 10.1080/00222895.2026.2637944
Eman Alsaqabi, Khushboo Verma, John Jeka
{"title":"Stochastic Resonance Stimulation Improves Postural Stability in People with Chronic Ankle Instability During Walking.","authors":"Eman Alsaqabi, Khushboo Verma, John Jeka","doi":"10.1080/00222895.2026.2637944","DOIUrl":"10.1080/00222895.2026.2637944","url":null,"abstract":"<p><p>Chronic ankle instability (CAI) affects up to 40% of individuals following lateral ankle sprains, leading to persistent sensorimotor deficits and functional limitations. This investigation examined the immediate effects of stochastic resonance (SR) electrical stimulation on postural control during visually perturbed walking in individuals with CAI (<i>NCT06484712</i>). Twenty-one adults with unilateral CAI participated in this study. Participants walked on a self-paced treadmill while exposed to mediolateral visual perturbations, both with and without the SR stimulation applied at the ankle, shank, and hip. Using a motion capture system, we investigated foot placing techniques, subtalar joint kinematics, and center of mass (CoM) excursion during the first eight steps after perturbation onset. SR stimulation significantly reduced mediolateral CoM excursion (<i>p</i> = 0.013, η<sup>2</sup> = 0.272) and peak movement (<i>p</i> = 0.038, η<sup>2</sup> = 0.198) on the affected side without changing local joint kinematics or stepping strategies. These results imply that SR rather than peripheral motor processes influence higher-order sensorimotor integration. Especially in addressing ongoing sensorimotor deficits that affect daily mobility and function, the selective enhancement of global stability measures during functional locomotor tasks offers compelling support for SR's therapeutic potential in rehabilitation protocols for individuals with CAI.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"253-265"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147500505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-07-17DOI: 10.1080/00222895.2026.2702481
Jeffrey C Ives, Jonathan H Sadanaga, Jania I Robinson, Dylan T Baker, Jackson E Fox, Joseph M Pezzini, Rachel C Hollis, Victoria G Maceira, Pedro Cruz
{"title":"Unilateral Post-Activation Performance Enhancement in a Bilateral Task.","authors":"Jeffrey C Ives, Jonathan H Sadanaga, Jania I Robinson, Dylan T Baker, Jackson E Fox, Joseph M Pezzini, Rachel C Hollis, Victoria G Maceira, Pedro Cruz","doi":"10.1080/00222895.2026.2702481","DOIUrl":"10.1080/00222895.2026.2702481","url":null,"abstract":"<p><p>The aim of the current study was to determine the efficacy of unilateral conditioning exercises on post activation performance enhancement (PAPE) during a bilateral task, with particular reference to leg dominance. Over three days, 22 young adult male and female subjects were tested on unilateral and bilateral leg power and balance measurements, examined for footedness using a footedness questionnaire, and performed left and right reactive lateral leaps before and after unilateral conditioning exercise treatments. Response time of the step leg and leap distance from the push-off leg were evaluated with repeated measures ANOVA and ANCOVA with a <i>p</i>-level of .05. Results revealed no effects attributable to ipsilateral or contralateral PAPE effects and no differences in left versus right leaping distance or response time. However, when footedness (right, mixed) effects were examined, differences in performance consequent to conditioning exercises were found. Mixed footed subjects responded slower and leaped further on posttests following CE, but these results were not based on which leg was conditioned. Mixed footers, and not right footers, may have adopted a leaping strategy following conditioning strategies. These findings question the usefulness of unidimensional assessments of leg dominance and laterality in evaluating characteristics of sport and exercise performance.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"557-571"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148473935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-05-31DOI: 10.1080/00222895.2026.2675333
Juhyeon Yeo, Oh-Sang Kwon, Yun Kyoung Shin
{"title":"A Boundary of Ideomotor Control: Semantic Labels Bias Selection but Do Not Tune Motor Execution.","authors":"Juhyeon Yeo, Oh-Sang Kwon, Yun Kyoung Shin","doi":"10.1080/00222895.2026.2675333","DOIUrl":"10.1080/00222895.2026.2675333","url":null,"abstract":"<p><p>Classic ideomotor theory proposed that actions can be automatically triggered by internally evoked representations of action-related features. This study examined whether motor execution in ideomotor action is more closely linked to lexical-semantic labels or to perceptually based evaluative content. In Experiments 1 and 2, participants responded to the Korean words \"short\" and \"long\" by pressing left or right keys. Semantic labels alone did not modulate keypress response duration (RD). However, in Experiment 2, task-irrelevant auditory tones of varying durations produced a graded increase in RD. Experiment 3 tested whether this modulation reflected physical duration itself or the evaluative processes involved in distinguishing and categorizing stimulus durations. Participants categorized six auditory stimuli as \"short\" or \"long,\" with categorization difficulty manipulated by varying the distance between boundary stimuli. RD increased gradually across stimulus durations, but this effect was not stronger in the easy condition despite the larger physical spacing between tones. In addition, RD showed a category-related increase beyond what could be explained by physical duration alone. Together, these findings suggest that motor execution is influenced less by lexical-semantic labels than by perceptually based evaluative and categorical processing, helping to clarify the level of mental content that serves as an ideomotor cue.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"419-431"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148139687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-07-14DOI: 10.1080/00222895.2026.2698547
Stylianos Grigoriadis, Vasileios Mylonas, Vassilios Panoutsakopoulos, Nick Stergiou, Thomas Nikodelis
{"title":"Aging Alters Force Control Regularity and Delays Adaptation to Isometric Force Perturbations.","authors":"Stylianos Grigoriadis, Vasileios Mylonas, Vassilios Panoutsakopoulos, Nick Stergiou, Thomas Nikodelis","doi":"10.1080/00222895.2026.2698547","DOIUrl":"10.1080/00222895.2026.2698547","url":null,"abstract":"<p><p>Variability is an inherent feature of human force output, and its temporal structure provides insights into motor control. In young adults, this structure has been associated with efficient motor behavior. Conversely, aging-related physiological changes may constrain neuromuscular adaptability, leading to less effective response to perturbations. We tested this hypothesis using a perturbation-based paradigm that quantified the time required to return to baseline force following unexpected target shifts during an isometric grip task. Sixteen young and eighteen older adults performed steady contractions and sudden upward (30→45% maximum voluntary contraction; MVC) and downward (30→15% MVC) force perturbations. Force regularity and variability magnitude were assessed using Sample Entropy (SaEn) and standard deviation (SD) across contraction intensities ranging from 5% to 80% MVC. Older adults exhibited significantly longer adaptation times and greater force regularity than young adults, whereas SD did not differ between age groups. Across both groups, downward perturbations resulted in slower recovery than upward perturbations, indicating direction-specific constraints in force control. These findings demonstrate that aging prolongs adaptation to force perturbations and increases force output regularity, highlighting perturbation-based assessments as a sensitive approach for probing adaptive motor control. Force regularity may represent a more informative marker of aging-related changes in motor control than variability magnitude.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"538-548"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148438661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-05-25DOI: 10.1080/00222895.2026.2674002
Shahar Agami, Lili Sror, Shelly Levy-Tzedek, Iuly Treger, Michal Vered, Mindy F Levin, Sigal Berman
{"title":"Individualized Virtual Angle Offset Training for Patients with Stroke.","authors":"Shahar Agami, Lili Sror, Shelly Levy-Tzedek, Iuly Treger, Michal Vered, Mindy F Levin, Sigal Berman","doi":"10.1080/00222895.2026.2674002","DOIUrl":"10.1080/00222895.2026.2674002","url":null,"abstract":"<p><p>Stroke is a leading cause of long-term sensorimotor disability, with upper limb deficits often persisting into the chronic stage. For many patients with stroke, the active muscle control zone, i.e., the angular range of typical muscle activation patterns, is reduced, leading to abnormal patterns and spasticity. When the displayed angle in a virtual environment is smaller than the actual angle, participants may implicitly perceive that their arm remains within the control zone. This discrepancy between visual and proprioceptive information may promote visuo-proprioceptive recalibration and sensorimotor adaptation. The current study included two preliminary investigations, one with healthy participants and one with participants with stroke, each divided into two groups (<i>offset</i>, <i>control</i>). Twenty-one healthy participants underwent a 30-min training session, after which they were tested with the actual elbow angle. Twelve hospitalized individuals with sub-acute stroke underwent three 30-min training sessions over one week. In both studies motion duration of participants who trained with an offset differed from motion of controls who trained with actual feedback. However, Fugl-Meyer Assessment upper limb scores in participants with stroke increased similarly for both groups. Additional testing is required to examine whether the method may be a potential direction for individualized impairment-based intervention.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"492-502"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148018609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Conflict-Induced Cognitive Load on Reactive Turning Strategies and Postural Control Timing.","authors":"Hiroki Ohsawa, Rin Sato, Fuzuki Kanzaki, Nanako Yamada, Yuma Takenaka, Kenichi Sugawara, Tomotaka Suzuki","doi":"10.1080/00222895.2026.2670477","DOIUrl":"10.1080/00222895.2026.2670477","url":null,"abstract":"<p><p>Reactive turning requires considerable cognitive resources and precise motor control to maintain dynamic balance. Increased cognitive load can impair motor performance and alter turning behavior. This study examined how cognitive load and cue timing influence reactive turning strategies and postural control timing. Nineteen healthy young adults performed 90° contralateral and ipsilateral reactive turns while walking and completing a flanker task under varying cue timings and conflict conditions. Turning strategies and temporal parameters (head/pelvis rotation and center of mass deceleration times) were analyzed using linear mixed models; sensitivity analyses additionally adjusted for turning strategy. Under conflict, participants maintained near-perfect directional accuracy; however, temporal parameters were significantly delayed. These delays persisted after accounting for strategy switching, suggesting that cognitive interference influenced the temporal organization of reactive turning. Turning strategy selection was primarily associated with cue timing, with no significant effect of cognitive conflict. Furthermore, when temporal constraints limited the feasibility of a prompt second-step turn, contralateral turns shifted toward a mechanically stable third-step reorganization, whereas ipsilateral turns relied on a less stable alternative. Overall, these findings suggest that cognitive load modulates the temporal coordination of postural control during reactive turning without altering the selected turning strategy.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"467-480"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147989816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-07-30DOI: 10.1080/00222895.2026.2688778
Ken Pitetti, Ruth Ann Miller, Michael Loovis, Nils A Hakansson
{"title":"Sex Differences in Postural Control in Middle School Students (11-14 Years) Using Stabilometry.","authors":"Ken Pitetti, Ruth Ann Miller, Michael Loovis, Nils A Hakansson","doi":"10.1080/00222895.2026.2688778","DOIUrl":"10.1080/00222895.2026.2688778","url":null,"abstract":"<p><p>Postural control (PC) is the capacity to integrate sensory information (visual, somatosensory, and vestibular) to generate muscular responses that maintain an upright posture. PC reflects overall musculoskeletal and neurological health. Establishing normative PC values in healthy middle school students (MSS), ages 11 to 14 years, is important for facilitating the early detection of balance-related anomalies. However, this process is complicated by variations in pubertal development, and existing research on sex differences in PC among MSS has produced inconclusive findings. Therefore, PC was measured using a portable force platform (stabilometry) under 12 testing conditions: three stances [two-feet, tandem, one-foot] with two vision states (eyes open/closed) on two surfaces (firm/foam). Two 30-sec trials in all 12 stances were performed by 164 (68 females, 12.1 ± 0.9 yrs; 96 males, 12.3 ± 1.0 yrs) MSS, with the best effort (i.e., lowest score) used for statistical analysis. Postural summary statistics of path length (mm), median velocity (MD, mm/sec), mean velocity (MN, mm/sec), and sway area (mm<sup>2</sup>) were calculated and compared. Results demonstrated that females consistently achieved better PC in all four summary statistics across stances. This study suggests that separate normative values for PC should be established for male and female MSS.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"573-592"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148632500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-05-11DOI: 10.1080/00222895.2026.2670520
Russell W Chan, Marcel Hildebrandt, Julian Elias Reiser, Mathias Vukelic, Willem Verwey, Aaron D Likens
{"title":"The Readiness-Efficiency Coupling: Synergy of High Preparatory and Reduced Execution Fractal Complexity in Motor Learning.","authors":"Russell W Chan, Marcel Hildebrandt, Julian Elias Reiser, Mathias Vukelic, Willem Verwey, Aaron D Likens","doi":"10.1080/00222895.2026.2670520","DOIUrl":"10.1080/00222895.2026.2670520","url":null,"abstract":"<p><p>Motor sequence learning (MSL) involves transitioning from reactive, stimulus-led control to predictive, automated execution. While expertise is traditionally quantified by speed and accuracy, the underlying organizational shifts in fractal movement variability remain poorly understood. We propose the Readiness-Efficiency hypothesis: expertise emerges through a functional coupling of high preparatory complexity and reduced execution complexity. Participants (<i>n</i> = 22) performed a whole-body Dance Discrete Sequence Production task while Center of Mass (CoM) kinematics were recorded. Hurst exponents (<i>H</i>) quantified fractal complexity across ten blocks of practice and transfer. As learning progressed, preparatory dynamics shifted toward higher complexity (<i>H<sub>prep</sub></i>↑), reflecting structured readiness, while execution dynamics shifted toward reduced complexity (<i>H<sub>exec</sub></i>↓), reflecting automated efficiency. Crucially, a three-way interaction revealed that the fastest response times were achieved specifically when high preparatory readiness was coupled with reduced execution complexity. This coupling collapsed upon transfer to novel sequences, indicating task-specificity. State-space analysis confirmed the Readiness-Efficiency configuration acts as a functional attractor, with the probability of occupying this state increasing five-fold through practice. These findings demonstrate that expertise is characterized by dynamic flexibility - the capacity to dissociate and pair control regimes to meet phase-specific demands - providing a mechanistic framework for profiling skill acquisition.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"401-418"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147876372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-03-09DOI: 10.1080/00222895.2026.2637940
Ekaterina Oparina, Dayanne S Antonio, Gabriele Russo, Edgar R Vieira, Marcelo Bigliassi
{"title":"Unveiling the Intricacies of Implicit Motor Learning in Adults Recovered from COVID-19.","authors":"Ekaterina Oparina, Dayanne S Antonio, Gabriele Russo, Edgar R Vieira, Marcelo Bigliassi","doi":"10.1080/00222895.2026.2637940","DOIUrl":"10.1080/00222895.2026.2637940","url":null,"abstract":"<p><p>COVID-19 is primarily a respiratory illness, but it has been linked to persistent neurocognitive deficits. Given the prefrontal cortex's role in cognitive-motor processing and implicit motor learning, this study examined whether individuals recovered from COVID-19 exhibit impairments in reaction time and procedural learning. Eighty-four college students (COVID-recovered <i>n</i> = 24; controls <i>n</i> = 60) completed a remote serial reaction time task. The COVID-recovered group showed significantly slower reaction times than controls (Δ = 47.1; ω² = 0.127). No group differences emerged for implicit learning (Δ = 12.5; ω² ≈ 0). Regression analyses indicated COVID-19 status predicted slower reaction times (β = 0.520, <i>p</i> = 0.048), independent of age, sex, BMI, and physical activity. These findings suggest residual cognitive-motor slowing following COVID-19 without impaired procedural learning.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"239-252"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147379254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of Motor BehaviorPub Date : 2026-01-01Epub Date: 2026-07-13DOI: 10.1080/00222895.2026.2691791
Zack Murphy, Jennifer Kemp, David Vandenheever
{"title":"Exploring Brain Activity in Novice Athletes During Closed and Open Skills in Table Tennis.","authors":"Zack Murphy, Jennifer Kemp, David Vandenheever","doi":"10.1080/00222895.2026.2691791","DOIUrl":"10.1080/00222895.2026.2691791","url":null,"abstract":"<p><p>This study investigated the neural correlates of closed and open-skill performance in novice table tennis players. Electroencephalography (EEG) was used to measure brain activity in 14 participants in a two-second window prior to movement onset by serving a ball (closed-skill) or returning a serve (open-skill) while attempting to hit a target. Results revealed distinct patterns of brain activity between the tasks. Linear mixed-effects models were used to compare EEG spectral power between Serve and Return trials and between successful and unsuccessful trials within each task. Return trials were associated with higher relative alpha power in the parietal and central regions, with additional exploratory effects at T7 and T8, compared with serve trials. Successful return trials were associated with lower relative occipital and parietal theta power than unsuccessful return trials. Successful serve trials were associated with higher relative central beta power and lower relative central and parietal theta power than unsuccessful serve trials. These findings suggest that novice table tennis performance is associated with task-specific differences in preparatory neural activity before movement onset. The study provides insights into the neural mechanisms underlying motor performance in novice athletes and highlights potential targets for training interventions aimed at improving skill acquisition and consistency.</p>","PeriodicalId":50125,"journal":{"name":"Journal of Motor Behavior","volume":" ","pages":"503-514"},"PeriodicalIF":1.3,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148431098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}