Richard E.A. van Emmerik’s research while affiliated with University of Massachusetts Amherst and other places

... Adaptations to changing environmental demands occur not only during steady state standing and gait (Rinaldi & Moraes, 2015) but likely also during transitory movements such as terminating gait. Jeong et al. (2024) investigated dual-task gait termination in combination with prehension compared with single-task gait termination only. They examined the TtC of the CoP and trunk (the sternum) during the preparation (from heel strike of the leading foot to double support at gait termination) and stabilization phases following termination and the reaching and fitting task, respectively (Jeong et al., 2024). ...

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Effects of Task Difficulty on Postural Control During a Combined Gait Termination and Manual Task

... These injuries are problematic, since they occur especially often in young athletes (3), can persist for a long time (4) and can lead to a reduced performance or an early end of a career (4). The high incidence of knee pain in volleyball might be explained by volleyball-speci c training variables such as high jumping loads, number of matches in the previous month, playing position, recovery time or movement execution (5)(6)(7)(8), which in turn seem to be in uenced by biomechanical variables correlated to strength and range of motion (ROM) (9, 10) (11,12). Identi cation of such biomechanical risk factors is also of high interest, since they can be implemented easier in training programs (warm-up routines) compared to other interventions such as load management or movement retraining, which might affect performance. ...

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Risk factors and their interactions for knee pain in female volleyball athletes: A cross-sectional study

... Word production: Of the 24 studies targeting word production, 22 focused on spoken-word production and two on written-word production [33,34]. Most studies targeted nouns, although some studies included verbs (n = 9) [33][34][35][36][37][38][39][40][41], proper nouns (n = 3) [14,42,43], or adjectives (n = 1) [41]. Words were most commonly selected from vocabulary databases (n = 15) [34][35][36][37]40,[43][44][45][46][47][48][49][50][51][52], although some studies focused on personally relevant words, chosen by the PWA based on their interests or communication needs (n = 9) [12,14,33,38,39,41,42,53,54]. ...

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Computer- and Smart-Tablet-Based Self-Administered Treatments in Chronic Post-Stroke Aphasia: A Systematic Review

... Decreased gait regularity in PwMS has been ascribed to several aspects [72], including footfall placement variability and reduced ability to walk straight by drifting from side to side [121]. As proposed by Jones and van Emmerik [122], somatosensory deficit of the plantar surface, together with proprioceptive [123] and vestibular impairments [124] typical of MS, may play a major role in incorrectly placing the feet during locomotion and maintaining straight-line walking, thus decreasing stride regularity and dynamic balance. Regarding this point, dynamic exercises performed in different perceptive contexts should be included to challenge the proprioceptive and vestibular sensory systems, for example, walking with turns, and walking backward and sideways with eyes open and closed on rigid or compliant surfaces [102], or wearing insoles of different rigidity/compliance. ...

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Walk Longer! Using Wearable Inertial Sensors to Uncover Which Gait Aspects Should Be Treated to Increase Walking Endurance in People with Multiple Sclerosis

... A dynamical systems perspective is essential for understanding coordination because it explains how movement patterns emerge from the interaction between the organism, task, and environment (Newell, 1985) through the process of self-organization. In the context of floorball shooting, this perspective helps explain how players adjust head-trunk coordination to coordinate movements (Zeff et al., 2023), track the ball, and shoot accurately. By understanding these adaptive processes, we can gain insights into how to improve shooting accuracy through training that enhances players' ability to respond effectively to different game situations. ...

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Head-Trunk Coordination During Shooting Skills in Young Floorball Players

... The most used outcome measures for functional walking ability assessment in MS have been the 6-Minute Walking Test, a walking capacity measure and the Timed Up and Go test 8 . They are followed by gait spatiotemporal parameters most often used to inform gait speed, cadence, and step length 8,19 . Moreover, assessment of walking speed with short walking capacity tests such as the 25-Foot Timed Walk or the 10-m Walk Test, and tests for walking an intermediate distance, such as the 2-min Walk Test, have been suggested in literature 7 . ...

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Mini-Review: Gait and balance assessment in multiple sclerosis

... This may reflect more pronounced and consistent group differences in DP across the entire lifting/lowering cycle, while CAV magnitudes are concentrated near early and end stages of lifting/lowering movements (e.g., 0 %, 50 %) (Fig. 2C & 2D). Importantly, CAV magnitude may be inflated by artifacts related to calculating CAV using circular statistics; however, these issues may be mitigated by using alternative VC analysis methods (Stock et al., 2018(Stock et al., , 2022. Regardless, previous work found that the effects of fatigue on trunk-pelvis coordination variability were not influenced by the analysis method (VC or eclipse area) when variability is calculated across the entire movement cycle (Smith et al., 2021). ...

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Using continuous relative phase and modified vector coding analyses to quantify spinal coordination and coordinative variability for healthy and chronic low back pain patients: An exploratory comparative analysis

... In contrast, middle-aged adults exhibited lower SampEn values, indicating a more rigid or less effective postural control strategy [29,32,35]. These findings challenge the previous notion that postural complexity in young and middle-aged adults during quiet standing may not differ significantly if the latter group is in good health [48]. The reduced postural control complexity observed in middle-aged adults might reflect the gradual effects of aging on neuromuscular control, such as sensory decline, which impairs the accuracy of perceiving and responding to postural disturbances due to slower and less precise muscle responses [49]. ...

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Age-Related Changes in Postural Stability in Response to Varying Surface Instability in Young and Middle-Aged Adults

... Examining the coordination patterns and variability during specific movement tasks provides information about the organization and flexibility of movement patterns in response to the task demands. As segments interact and work together, further insight can be gained through analysis of segment coordination, which has also proven sensitive in identifying subtle differences and discerning differences in head-trunk coordination (Zeff et al., 2022). ...

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Head-Trunk Coordination During Shooting Skills in Young Floorball Players

... Overall, the experimental design of the present study had some important methodological strengths that deserve to be highlighted. The coordination variability was assessed in overground running to increase the external validity of the experiment, as opposed to a treadmill situation that may influence running technique (Toro et al., 2022), and across 10 strides which is a larger number than typically used in previous research (Foch & Milner, 2019;Hannigan & Chou, 2019;Takabayashi et al., 2018). In addition, both joint and segment−related movements were assessed on the hip joint, which allowed the role of the pelvis and thigh segments to be clarified in relation to previous studies reporting no coordinative differences due to ITBS on the hip joint movements (Brown et al., 2016;Foch & Milner, 2019). ...

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Current iliotibial band syndrome alters patterns of running coordination in male and female runners, but not their levels of coordination variability