Developmental coordination disorder: is clumsy motor behavior caused by a lesion of the brain at early age?

Area of Science:

• Neuroscience
• Developmental Pediatrics
• Child Psychology

Background:

• Developmental Coordination Disorder (DCD) and clumsiness in children are often associated with minor neurological dysfunction (MND).
• Long-term follow-up studies are crucial for understanding the developmental trajectories of neurological and behavioral outcomes.
• Distinguishing subtypes of MND is essential for targeted interventions and understanding etiology.

Purpose of the Study:

• To differentiate between basic forms of minor neurological dysfunction (MND) in children.
• To investigate the etiological factors and developmental characteristics of simple and complex MND.
• To explore the association of different MND subtypes with prenatal/perinatal adversities and later developmental problems.

Main Methods:

• Analysis of data from the Groningen Perinatal Project, a long-term follow-up study.
• Identification and characterization of children with simple and complex MND based on neurological assessments during school age and adolescence.
• Correlation analysis between MND subtypes, genetic factors, early life stress, perinatal adversities, and learning/behavioral outcomes.

Main Results:

• Two primary forms of MND were identified: simple and complex.
• Simple MND, characterized by fewer dysfunctional clusters or specific motor signs (choreiform dyskinesia, hypotonia), is likely influenced by genetic constitution and early life stress, with a moderate risk for learning/behavioral issues.
• Complex MND, presenting with more clusters or fine motor/coordination deficits, is strongly linked to perinatal adversities and brain lesions, showing a high correlation with attention and learning problems.

Conclusions:

• Minor neurological dysfunction in children can be categorized into simple and complex forms with distinct etiological pathways and developmental consequences.
• Simple MND may represent the lower range of normal brain function, influenced by genetic and environmental factors.
• Complex MND suggests a potential early brain lesion, with significant implications for cognitive and behavioral development, particularly attention and learning.