Impacts of Motor Developmental Delay on the Inter-Joint Coordination Using Kinematic Synergies of Joint Angles During Infant Crawling

Zhang, Li; Deng, Chun F.; Liu, Yuan; Chen, Lin; Xiao, Nong; Zhai, Shengjie; Hou, Wei; Chen, Yu X.; Wu, Xiao

doi:10.1109/tnsre.2022.3180929

Cited by 2 publications

(7 citation statements)

References 37 publications

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“…3 b). These results were in line with our previous study based on kinematic synergy analysis among the joints of each of the four limbs during crawling, implying that the coordination patterns of lower limbs were much more affected by the motor developmental levels for infants [ 33 ]. This influence might be related to the nervous system’s need for additional efforts to maintain functionality and cope with continuous perturbations [ 30 , 31 ].…”

Section: Discussionsupporting

confidence: 91%

“…The coordination patterns of bilateral limbs in TD, ARDD, AHRDD and CDD groups were not quite consistent (i.e., inconsistent CS values between the LU- and RU-dominant synergies or between the LL- and RL-dominant synergies) (Fig. 4 ), which were contrary to the symmetry results of bilateral limbs of our previous study [ 33 ]. This discrepancy could be due to the differences of research perspectives.…”

Section: Discussioncontrasting

confidence: 82%

“…The upper limbs showed stronger participation and better intrasubject consistency (i.e., higher FWHM and CS values of LU- and RU-dominant synergies) during infant crawling than the lower limbs (Figs. 3 b, 4 ), validating the asynchronous developmental sequence of upper to lower limbs [ 1 , 11 , 33 ]. Moreover, our study further found that MDD widened the activation duration of RL-dominant synergy (i.e., increased FWHM values of RL-dominant synergy) during infant crawling (Fig.…”

Section: Discussionmentioning

confidence: 63%

“…Thereinto, those no significant differences could be interpreted as the natural functional redistribution among multiple joints of limbs to propel and control a given motion task [ 38 ]. Those opposite differences between TD and ARDD groups were related to the improvement in motion proficiency for ARDD group after rehabilitation training, even though their motor abilities should be similar because of similar biological ages and delayed ages of gross motor [ 2 , 33 ]. Taken together, these reductions in the joint VAF values and synergy weightings for infants with MDD reflected the reduced stability of joints and limbs during crawling, which could be used in the future for the development of rehabilitation strategies.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, to our knowledge, the above kinematic features, which are crucial measures of joint activities for clinical diagnosis and motor rehabilitation of MDD, are used only to quantify interlimb coordination of muscular activities during human movement. Our previous study demonstrated that the kinematic features calculated from kinematic synergies during crawling could reflect the abnormal organization of joint activities for infants with MDD [ 33 ], but it quantified only abnormal coordination among the joints of each of the four limbs, providing little information about abnormal interlimb coordination across the joints of the four limbs during crawling.…”

Section: Introductionmentioning

confidence: 99%

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Abnormal interlimb coordination of motor developmental delay during infant crawling based on kinematic synergy analysis

Zhang,

Xu,

Chen

et al. 2024

BioMed Eng OnLine

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Background Previous studies have reported that abnormal interlimb coordination is a typical characteristic of motor developmental delay (MDD) during human movement, which can be visually manifested as abnormal motor postures. Clinically, the scale assessments are usually used to evaluate interlimb coordination, but they rely heavily on the subjective judgements of therapists and lack quantitative analysis. In addition, although abnormal interlimb coordination of MDD have been studied, it is still unclear how this abnormality is manifested in physiology-related kinematic features. Objectives This study aimed to evaluate how abnormal interlimb coordination of MDD during infant crawling was manifested in the stability of joints and limbs, activation levels of synergies and intrasubject consistency from the kinematic synergies of tangential velocities of joints perspective. Methods Tangential velocities of bilateral shoulder, elbow, wrist, hip, knee and ankle over time were computed from recorded three-dimensional joint trajectories in 40 infants with MDD [16 infants at risk of developmental delay, 11 infants at high risk of developmental delay, 13 infants with confirmed developmental delay (CDD group)] and 20 typically developing infants during hands-and-knees crawling. Kinematic synergies and corresponding activation coefficients were derived from those joint velocities using the non-negative matrix factorization algorithm. The variability accounted for yielded by those synergies and activation coefficients, and the synergy weightings in those synergies were used to measure the stability of joints and limbs. To quantify the activation levels of those synergies, the full width at half maximum and center of activity of activation coefficients were calculated. In addition, the intrasubject consistency was measured by the cosine similarity of those synergies and activation coefficients. Results Interlimb coordination patterns during infant crawling were the combinations of four types of single-limb movements, which represent the dominance of each of the four limbs. MDD mainly reduced the stability of joints and limbs, and induced the abnormal activation levels of those synergies. Meanwhile, MDD generally reduced the intrasubject consistency, especially in CDD group. Conclusions These features have the potential for quantitatively evaluating abnormal interlimb coordination in assisting the clinical diagnosis and motor rehabilitation of MDD.

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Section: Discussionsupporting

confidence: 91%

Section: Discussioncontrasting

confidence: 82%