Linear and Nonlinear Analyses of the Cardiac Autonomic Control in Children With Developmental Coordination Disorder:

Jorge L Cavalcante Neto1, Antonio R Zamunér2, Bianca C Moreno3

  • 1Núcleo de Estudos em Neuropediatria e Motricidade, Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, Brazil.

Insights

Children with Developmental Coordination Disorder (DCD) and those at risk (r-DCD) show impaired cardiac autonomic control. This dysfunction includes reduced parasympathetic activity and blunted responses to postural changes, impacting overall health.

Area of Science:

  • Pediatric Neurology
  • Cardiovascular Physiology
  • Autonomic Nervous System Function

Background:

  • Developmental Coordination Disorder (DCD) and at-risk (r-DCD) children exhibit motor impairments affecting daily life.
  • These children may also present cardiac autonomic control abnormalities, further limiting health and functionality.
  • Understanding autonomic control in DCD is crucial for comprehensive management.

Purpose of the Study:

  • To assess cardiac autonomic control using linear and nonlinear heart rate variability (HRV) analysis.
  • To compare autonomic function between DCD, r-DCD, and typically developed children (CG) under supine and orthostatic conditions.
  • To investigate potential links between motor impairments and cardiovascular regulation.

Main Methods:

  • Recruited 13 DCD, 19 r-DCD, and 18 CG children (aged 8.08-8.50 years).
  • Utilized a validated HR monitor to record R-R intervals for HRV analysis.
  • Applied linear, nonlinear, and symbolic HRV methods during supine and orthostatic (standing) tests.

Main Results:

  • The DCD group showed blunted cardiac autonomic adjustment to orthostatic stress, unlike r-DCD and CG.
  • DCD children exhibited lower parasympathetic modulation in the supine position compared to r-DCD and CG.
  • Only the CG group demonstrated a significant increase in heart rate and specific symbolic index changes from supine to standing.

Conclusions:

  • Children with DCD and r-DCD display cardiac autonomic dysfunction, including altered sympathetic/parasympathetic balance and reduced complexity.
  • A blunted autonomic response to orthostatic challenges was observed in the DCD group.
  • Cardiovascular health interventions should be integrated into the management of DCD, even with milder motor deficits.

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