Slow anticipatory postural adjustments compromise dynamic stability in children with autism during gait initiation / Tisserand ROMAIN in Research in Autism, 133 (May 2026)  

Public ISBD [article]  inResearch in Autism > 133 (May 2026) . - p.202913 Titre : Slow anticipatory postural adjustments compromise dynamic stability in children with autism during gait initiation Type de document : texte imprimé Auteurs : Tisserand ROMAIN, Auteur ; Benchekri AURÉLIE, Auteur ; Emilie DOAT, Auteur ; Amestoy ANOUCK, Auteur ; Lemonnier ERIC, Auteur ; Cottenceau HÉLÈNE, Auteur ; Anaick PERROCHON, Auteur ; Mohamed JABER, Auteur ; Jean-René CAZALETS, Auteur ; Bidet-Ildei CHRISTEL, Auteur ; Fradet LAETITIA, Auteur Article en page(s) : p.202913 Langues : Anglais (eng) Mots-clés : Autistic children  Gait initiation  Anticipatory postural adjustments  Motor control  Balance Index. décimale : PER Périodiques Résumé : Motor impairments are frequently observed in children with autism spectrum disorders (ASD). However, they remain absent from the DSM-5 diagnostic criteria, potentially delaying early ASD diagnosis. Gait initiation challenges balance–movement coordination more than steady-state motor tasks do and may offer valuable insights into distinctive motor profiles associated with ASD. Although few studies have explored locomotor initiation in children with ASD, they have not thoroughly analysed dynamic stability processes, leaving the underlying mechanisms of motor deficits in ASD unclear. This study compared the biomechanical characteristics of anticipatory postural adjustments (APAs) during gait initiation in children with ASD (n = 30) with those of age-matched non-autistic children (NAs) (n = 30). Three-dimensional ground reaction forces and whole-body marker trajectories were recorded via two force plates and an optoelectronic system. The APA duration, centre of pressure (CoP) features, margin of stability (MoS) at foot-off, and joint angles were computed and analysed. Intergroup differences were tested using nonparametric Mann–Whitney U tests. Compared with the NA children, the ASD children presented longer APA durations and reduced joint angles in the stance leg during the early APA subphase. These alterations resulted in a longer late-phase APAS duration and a significantly larger negative MoS in the mediolateral direction at foot-off. Overall, these findings suggest deficits in both feedforward control, as supported by a slower and more rigid strategy for initiation, and feedback regulation, as supported by a foot lift in worse conditions for dynamic stability. Together, these impairments may represent early motor markers of ASD with potential diagnostic value. En ligne : https://doi.org/10.1016/j.reia.2026.202913 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=585 [article] Slow anticipatory postural adjustments compromise dynamic stability in children with autism during gait initiation [texte imprimé] / Tisserand ROMAIN, Auteur ; Benchekri AURÉLIE, Auteur ; Emilie DOAT, Auteur ; Amestoy ANOUCK, Auteur ; Lemonnier ERIC, Auteur ; Cottenceau HÉLÈNE, Auteur ; Anaick PERROCHON, Auteur ; Mohamed JABER, Auteur ; Jean-René CAZALETS, Auteur ; Bidet-Ildei CHRISTEL, Auteur ; Fradet LAETITIA, Auteur . - p.202913. Langues : Anglais (eng) in Research in Autism > 133 (May 2026) . - p.202913 Mots-clés : Autistic children  Gait initiation  Anticipatory postural adjustments  Motor control  Balance Index. décimale : PER Périodiques Résumé : Motor impairments are frequently observed in children with autism spectrum disorders (ASD). However, they remain absent from the DSM-5 diagnostic criteria, potentially delaying early ASD diagnosis. Gait initiation challenges balance–movement coordination more than steady-state motor tasks do and may offer valuable insights into distinctive motor profiles associated with ASD. Although few studies have explored locomotor initiation in children with ASD, they have not thoroughly analysed dynamic stability processes, leaving the underlying mechanisms of motor deficits in ASD unclear. This study compared the biomechanical characteristics of anticipatory postural adjustments (APAs) during gait initiation in children with ASD (n = 30) with those of age-matched non-autistic children (NAs) (n = 30). Three-dimensional ground reaction forces and whole-body marker trajectories were recorded via two force plates and an optoelectronic system. The APA duration, centre of pressure (CoP) features, margin of stability (MoS) at foot-off, and joint angles were computed and analysed. Intergroup differences were tested using nonparametric Mann–Whitney U tests. Compared with the NA children, the ASD children presented longer APA durations and reduced joint angles in the stance leg during the early APA subphase. These alterations resulted in a longer late-phase APAS duration and a significantly larger negative MoS in the mediolateral direction at foot-off. Overall, these findings suggest deficits in both feedforward control, as supported by a slower and more rigid strategy for initiation, and feedback regulation, as supported by a foot lift in worse conditions for dynamic stability. Together, these impairments may represent early motor markers of ASD with potential diagnostic value. En ligne : https://doi.org/10.1016/j.reia.2026.202913 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=585

---

1 (1 - 1 / 1) Par page : 25 50 100 200