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Self-injurious behaviour in retarded children: clinical phenomena and biological mechanisms
1Department of Child and Adolescent Psychiatry, University of Utrecht, The Netherlands.
Insights
Self-injurious behaviour (SIB) is a significant issue in children with autism and intellectual disabilities. Research reviews clinical data, animal models, and biochemical pathways, suggesting neurotransmitter involvement and potential pharmacological treatments for SIB.
Area of Science:
- Neuroscience
- Developmental Psychology
- Clinical Medicine
Background:
- Self-injurious behaviour (SIB) is a prevalent and severe problem in children with autism and intellectual disabilities.
- Specific clinical syndromes, such as Lesch-Nyhan syndrome and Tourette's syndrome, are notably associated with SIB.
- Understanding the underlying mechanisms of SIB is crucial for effective intervention.
Purpose of the Study:
- To summarize current clinical knowledge regarding self-injurious behaviour (SIB).
- To review animal models that elucidate the neurobiological underpinnings of SIB.
- To discuss biochemical models and outline potential pharmacological interventions for SIB.
Main Methods:
- Review of clinical literature on SIB, including case studies of associated syndromes.
- Analysis of animal models investigating the roles of dopaminergic, opioidergic, and serotonergic systems.
- Discussion of proposed biochemical models and pharmacological strategies for human SIB.
Main Results:
- Clinical syndromes like Lesch-Nyhan and Tourette's are strongly linked to SIB.
- Animal models implicate key neurotransmitter systems (dopaminergic, opioidergic, serotonergic) in SIB pathophysiology.
- Biochemical models in humans are proposed, guiding potential pharmacological approaches.
Conclusions:
- SIB in children with developmental disabilities has complex neurobiological roots.
- Neurotransmitter systems play a critical role in the development and maintenance of SIB.
- Pharmacological interventions targeting these systems offer potential therapeutic avenues for SIB.
Abstract:
Self-injurious behaviour (SIB) is a frequently occurring and serious problem in autistic and non-autistic retarded children. This paper first summarizes clinical knowledge on SIB. Attention is paid to the Lesch-Nyhan syndrome and Tourette's syndrome as examples of clinical syndromes that are particularly associated with SIB. Then animal models are reviewed that suggest the involvement of dopaminergic, opioidergic and serotonergic mechanisms in the pathophysiology of SIB. The putative biochemical models of SIB in humans are discussed and pharmacological interventions are briefly outlined.