scholarly journals Modality-specific attractor dynamics in dyadic entrainment

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mattia Rosso ◽  
Pieter J. Maes ◽  
Marc Leman
Keyword(s):  
Coordination Dynamics ◽  
Perceptual Information ◽  
Experimental Paradigm ◽  
Rhythmic Movements ◽  
Joint Coordination ◽  
Fundamental Knowledge ◽  
Attractor Dynamics ◽  
Sensory Modalities ◽  
Rhythmic Task ◽  
Coordination Patterns

AbstractRhythmic joint coordination is ubiquitous in daily-life human activities. In order to coordinate their actions towards shared goals, individuals need to co-regulate their timing and move together at the collective level of behavior. Remarkably, basic forms of coordinated behavior tend to emerge spontaneously as long as two individuals are exposed to each other’s rhythmic movements. The present study investigated the dynamics of spontaneous dyadic entrainment, and more specifically how they depend on the sensory modalities mediating informational coupling. By means of a novel interactive paradigm, we showed that dyadic entrainment systematically takes place during a minimalistic rhythmic task despite explicit instructions to ignore the partner. Crucially, the interaction was organized by clear dynamics in a modality-dependent fashion. Our results showed highly consistent coordination patterns in visually-mediated entrainment, whereas we observed more chaotic and more variable profiles in the auditorily-mediated counterpart. The proposed experimental paradigm yields empirical evidence for the overwhelming tendency of dyads to behave as coupled rhythmic units. In the context of our experimental design, it showed that coordination dynamics differ according to availability and nature of perceptual information. Interventions aimed at rehabilitating, teaching or training sensorimotor functions can be ultimately informed and optimized by such fundamental knowledge.

scholarly journals Dyadic Entrainment. An Overwhelming and Modality-Dependent Phenomenon.

2021 ◽  
Author(s):  
Mattia Rosso ◽  
Pieter-Jan Maes ◽  
Marc Leman
Keyword(s):  
Daily Life ◽  
Coordination Dynamics ◽  
Perceptual Information ◽  
Experimental Paradigm ◽  
Rhythmic Movements ◽  
Joint Coordination ◽  
Fundamental Knowledge ◽  
Sensory Modalities ◽  
Rhythmic Task ◽  
Coordination Patterns

Abstract Rhythmic joint coordination is ubiquitous in daily-life human activities. In order to coordinate their actions towards shared goals, individuals need to co-regulate their timing and move together at the collective level of behavior. Remarkably, basic forms of coordinated behavior tend to emerge spontaneously as long as two individuals are exposed to each other’s rhythmic movements. The present study investigated the dynamics of spontaneous dyadic entrainment, and more specifically how they depend on the sensory modalities mediating informational coupling. By means of a novel interactive paradigm, we showed that dyadic entrainment systematically takes place during a minimalistic rhythmic task despite explicit instructions to ignore the partner. Crucially, the interaction was organized by clear dynamics in a modality-dependent fashion. Our results showed highly consistent coordination patterns in visually-mediated entrainment, whereas we observed more chaotic and more variable profiles in the auditorily-mediated counterpart. The proposed experimental paradigm yields empirical evidence for the overwhelming tendency of dyads to behave as coupled rhythmic units. In the context of our experimental design, it showed that coordination dynamics differ according to availability and nature of perceptual information. Interventions aimed at rehabilitating, teaching or training sensorimotor functions can be ultimately informed and optimized by such fundamental knowledge.

scholarly journals Ignoring Irrelevant Information: Enhanced Intermodal Attention in Synaesthetes

2017 ◽  
Vol 30 (3-5) ◽  
pp. 253-277 ◽  
Author(s):  
Anna Mas-Casadesús ◽  
Elena Gherri
Keyword(s):  
Direct Evidence ◽  
Flanker Task ◽  
Sensory Modality ◽  
Irrelevant Information ◽  
Daily Activities ◽  
Perceptual Information ◽  
Conflicting Information ◽  
Sensory Modalities ◽  
Irrelevant Distractors ◽  
Task Irrelevant

Despite the fact that synaesthetes experience additional percepts during their inducer-concurrent associations that are often unrelated or irrelevant to their daily activities, they appear to be relatively unaffected by this potentially distracting information. This might suggest that synaesthetes are particularly good at ignoring irrelevant perceptual information coming from different sensory modalities. To investigate this hypothesis, the performance of a group of synaesthetes was compared to that of a matched non-synaesthete group in two different conflict tasks aimed at assessing participants’ abilities to ignore irrelevant information. In order to match the sensory modality of the task-irrelevant distractors (vision) with participants’ synaesthetic attentional filtering experience, we tested only synaesthetes experiencing at least one synaesthesia subtype triggering visual concurrents (e.g., grapheme–colour synaesthesia or sequence–space synaesthesia). Synaesthetes and controls performed a classic flanker task (FT) and a visuo-tactile cross-modal congruency task (CCT) in which they had to attend to tactile targets while ignoring visual distractors. While no differences were observed between synaesthetes and controls in the FT, synaesthetes showed reduced interference by the irrelevant distractors of the CCT. These findings provide the first direct evidence that synaesthetes might be more efficient than non-synaesthetes at dissociating conflicting information from different sensory modalities when the irrelevant modality correlates with their synaesthetic concurrent modality (here vision).

Inter-joint coordination patterns differ between younger and older runners

2019 ◽  
Vol 64 ◽  
pp. 164-170 ◽  
Author(s):  
Kathryn Harrison ◽  
Yong Ung Kwon ◽  
Adam Sima ◽  
Bhushan Thakkar ◽  
Gregory Crosswell ◽  
...  
Keyword(s):  
Joint Coordination ◽  
Coordination Patterns

Intralimb Joint Coordination Patterns of the Lower Extremity in Maximal Velocity Phase Sprint Running

2010 ◽  
Vol 26 (2) ◽  
pp. 188-195 ◽  
Author(s):  
Marianne J.R. Gittoes ◽  
Cassie Wilson
Keyword(s):  
Lower Extremity ◽  
Sagittal Plane ◽  
Coordination Pattern ◽  
Maximal Velocity ◽  
Joint Coordination ◽  
Sprint Running ◽  
Joint Coupling ◽  
Plane Joint ◽  
Coordination Patterns ◽  
Coordinate Data

This study aimed to develop insight into the lower extremity joint coupling motions used in the maximal velocity phase of sprint running. Two-dimensional coordinate data were used to derive sagittal plane joint angle profiles of sprint running trials. Intralimb joint coupling motions were examined using a continuous relative phase (CRP) analysis. The knee-ankle (KA) coupling was more out of phase compared with the hip-knee (HK) coupling across the step phase (mean CRP: KA 89.9° HK 34.2°) and produced a lower within-athlete CRP variability (VCRP) in stance. Touchdown (TD) produced more out-of-phase motions and a larger VCRP than toe-off. A destabilization of the lower extremity coordination pattern was considered necessary at TD to allow for the swing-to-stance transition. The key role that the KA joint motion has in the movement patterns used by healthy athletes in the maximal velocity phase of sprint running was highlighted.

Movement Variability as a Clinical Measure for Locomotion

2000 ◽  
Vol 16 (4) ◽  
pp. 419-427 ◽  
Author(s):  
Bryan C. Heiderscheit
Keyword(s):  
Human Movement ◽  
Clinical Implications ◽  
Clinical Perspective ◽  
Movement Variability ◽  
Movement Coordination ◽  
Gait Stability ◽  
Joint Coordination ◽  
Clinical Measure ◽  
Coordination Patterns

The purpose of this paper is to discuss the role of variability in human movement, with emphasis on locomotion variability. Based on the assessment of stride characteristics, movement variability has been associated with reduced gait stability and unsteadiness. However, based on the measure of joint coordination during locomotion, variability has been suggested to provide a source of adaptation. Therefore, it would appear that the assessment of movement coordination from either the task outcome (i.e., stride characteristics) or the joint coordination patterns provide distinctly opposing views of variability. This paper will discuss the use of the variability measures, specifically joint coordination variability, from a clinical perspective. Investigations will be presented in which a reduction in joint coordination variability has been associated with pathology. Finally, the clinical implications of these measures as well as treatment suggestions are discussed.

scholarly journals Lower Limb Inter-Joint Coordination of Unilateral Transfemoral Amputees: Implications for Adaptation Control

2020 ◽  
Vol 10 (12) ◽  
pp. 4072 ◽  
Author(s):  
Zhi Xu ◽  
Duo Wai-Chi Wong ◽  
Fei Yan ◽  
Tony Lin-Wei Chen ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Lower Limb ◽  
Cross Correlation ◽  
Relative Phase ◽  
Lower Limbs ◽  
Foot Placement ◽  
Joint Coordination ◽  
Placement Accuracy ◽  
Transfemoral Amputees ◽  
Continuous Relative Phase ◽  
Coordination Patterns

The gait of transfemoral amputees can be made smoother by adjusting the inter-joint coordination of both lower limbs. In this study, we compared the inter-joint coordination of the amputated and non-amputated limbs of unilateral amputees to able-bodied controls. Eight amputees and eight able-bodied control participants were recruited. Walking speed, stance–swing time ratio, joint angle, joint angular velocity, and inter-joint coordination parameters—including continuous relative phase (CRP) and decomposition index (DI)—of the lower-limb joint pairs in stance and swing phases were investigated. Similarity of the CRP between groups was evaluated using cross-correlation measures and root-mean-square, and the variability of the CRP was examined by deviation phase (DP). There were significant differences between the amputated limbs and controls in CRP of hip–knee and knee–ankle in stance and swing, DP of knee–ankle and hip–ankle in stance, and DI of hip–knee in swing. For the non-amputated limbs, there were significant differences in CRP and DP of knee–ankle, and DI of hip–knee in swing compared to controls. The amputees utilized unique inter-joint coordination patterns for both limbs—particularly the hip joint—to compensate for the support-capability impairment due to limb salvage and ensure foot placement accuracy.

Visual information and multi-joint coordination patterns in one-leg stance

2014 ◽  
Vol 39 (3) ◽  
pp. 909-914 ◽  
Author(s):  
Zheng Wang ◽  
Peter C.M. Molenaar ◽  
John H. Challis ◽  
Kimberlee Jordan ◽  
Karl M. Newell
Keyword(s):  
Visual Information ◽  
Joint Coordination ◽  
Coordination Patterns

Coordination Dynamics of Large-scale Neural Circuitry Underlying Rhythmic Sensorimotor Behavior

2009 ◽  
Vol 21 (12) ◽  
pp. 2420-2433 ◽  
Author(s):  
Kelly J. Jantzen ◽  
Fred L. Steinberg ◽  
J. A. Scott Kelso
Keyword(s):  
Large Scale ◽  
Effective Connectivity ◽  
Behavioral Pattern ◽  
Coordination Dynamics ◽  
Coordination Pattern ◽  
Behavioral Patterns ◽  
Neural Basis ◽  
Neural Organization ◽  
The Stability ◽  
Coordination Patterns

In coordination dynamics, rate is a nonspecific control parameter that alters the stability of behavioral patterns and leads to spontaneous pattern switching. We used fMRI in conjunction with measures of effective connectivity to investigate the neural basis of behavioral dynamics by examining two coordination patterns known to be differentially stable (synchronization and syncopation) across a range of rates (0.75 to 1.75 Hz). Activity in primary auditory and motor cortices increased linearly with rate, independent of coordination pattern. On the contrary, activity in a premotor–cerebellar circuit varied directly with the stability of the collective variable (relative phase) that specifies coordinated behavioral patterns. Connectivity between premotor and motor cortices was also modulated by the stability of the behavioral pattern indicative of greater reliance on sensorimotor integration as action becomes more variable. By establishing a critical connection between behavioral and large scale brain dynamics, these findings reveal a basic principle for the neural organization underlying coordinated action.

Variability of Stride Characteristics and Joint Coordination among Individuals with Unilateral Patellofemoral Pain

2002 ◽  
Vol 18 (2) ◽  
pp. 110-121 ◽  
Author(s):  
Bryan C. Heiderscheit ◽  
Joseph Hamill ◽  
Richard E.A. van Emmerik
Keyword(s):  
Relative Motion ◽  
Stride Length ◽  
Patellofemoral Pain ◽  
Transverse Plane ◽  
Heel Strike ◽  
Injured Limb ◽  
Joint Coordination ◽  
Vector Coding ◽  
Intralimb Coordination ◽  
Coordination Patterns

The purpose of this investigation was to determine whether individuals with patellofemoral pain (PFP) display a reduction in intralimb joint coordination variability compared to nonimpaired persons. In addition, it was hypothesized that the variability of the stride characteristics would be similar between groups. Eight individuals with unilateral PFP and 8 nonimpaired participants ran on a treadmill at a fixed (2.68 m·s–1) and preferred speed while stride characteristics and 3-D kinematics of the bilateral lower extremities were recorded. Intralimb coordination variability was measured using a vector coding technique applied to relative motion plots of various joint couplings. The PFP group displayed greater stride length variability during running at the preferred speed. However, this was not the case during running at the fixed speed. When averaging across the entire stride cycle, coordination variability for all joint couplings was consistent between the two groups. However, further analysis about heel-strike revealed reduced joint coordination variability for the thigh rotation/leg rotation coupling of the PFP group’s injured limb compared to that of the nonimpaired group. With the exception of the transverse plane rotations at heel-strike, it would appear that the level of pain experienced by the PFP participants may not be great enough to produce a change in the intralimb coordination patterns during running.

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