Book contents
- Frontmatter
- Contents
- Contact information for authors
- Biography for Jacobus Donders and Scott J. Hunter
- Introduction
- Section I Theory and models
- Section II Disorders
- 5a Attention deficit hyperactivity disorder in children and adolescents
- 5b Attention deficit hyperactivity disorder in adults
- 5c Attention deficit hyperactivity disorder: a lifespan synthesis
- 6a Learning disorders in children and adolescents
- 6b Learning disorders in adults
- 6c Synthesis of chapters on learning disabilities: overview and additional perspectives
- 7a Infants and children with spina bifida
- 7b Adolescence and emerging adulthood in individuals with spina bifida: a developmental neuropsychological perspective
- 7c Spina bifida/myelomeningocele and hydrocephalus across the lifespan: a developmental synthesis
- 8 Cerebral palsy across the lifespan
- 9a Intellectual disability across the lifespan
- 9b Lifespan aspects of PDD/autism spectrum disorders (ASD)
- 9c Autism spectrum disorders and intellectual disability: common themes and points of divergence
- 10a Hearing loss across the lifespan: neuropsychological perspectives
- 10b Visual impairment across the lifespan: neuropsychological perspectives
- 11a Traumatic brain injury in childhood
- 11b Adult outcomes of pediatric traumatic brain injury
- 11c Neurobehavioral aspects of traumatic brain injury sustained in adulthood
- 11d Traumatic brain injury in older adults
- 11e Traumatic brain injury across the lifespan: a long-term developmental perspective
- 12a Pediatric aspects of epilepsy
- 12b A lifespan perspective of cognition in epilepsy
- 13a Leukemia and lymphoma across the lifespan
- 13b Lifespan aspects of brain tumors
- 14 Lifespan aspects of endocrine disorders
- 15 Metabolic and neurodegenerative disorders across the lifespan
- 16a Psychopathological conditions in children and adolescents
- 16b Psychopathological conditions in adults
- 16c Neuropsychological aspects of psychopathology across the lifespan: a synthesis
- Index
- Plate section
- References
15 - Metabolic and neurodegenerative disorders across the lifespan
from Section II - Disorders
Published online by Cambridge University Press: 07 May 2010
- Frontmatter
- Contents
- Contact information for authors
- Biography for Jacobus Donders and Scott J. Hunter
- Introduction
- Section I Theory and models
- Section II Disorders
- 5a Attention deficit hyperactivity disorder in children and adolescents
- 5b Attention deficit hyperactivity disorder in adults
- 5c Attention deficit hyperactivity disorder: a lifespan synthesis
- 6a Learning disorders in children and adolescents
- 6b Learning disorders in adults
- 6c Synthesis of chapters on learning disabilities: overview and additional perspectives
- 7a Infants and children with spina bifida
- 7b Adolescence and emerging adulthood in individuals with spina bifida: a developmental neuropsychological perspective
- 7c Spina bifida/myelomeningocele and hydrocephalus across the lifespan: a developmental synthesis
- 8 Cerebral palsy across the lifespan
- 9a Intellectual disability across the lifespan
- 9b Lifespan aspects of PDD/autism spectrum disorders (ASD)
- 9c Autism spectrum disorders and intellectual disability: common themes and points of divergence
- 10a Hearing loss across the lifespan: neuropsychological perspectives
- 10b Visual impairment across the lifespan: neuropsychological perspectives
- 11a Traumatic brain injury in childhood
- 11b Adult outcomes of pediatric traumatic brain injury
- 11c Neurobehavioral aspects of traumatic brain injury sustained in adulthood
- 11d Traumatic brain injury in older adults
- 11e Traumatic brain injury across the lifespan: a long-term developmental perspective
- 12a Pediatric aspects of epilepsy
- 12b A lifespan perspective of cognition in epilepsy
- 13a Leukemia and lymphoma across the lifespan
- 13b Lifespan aspects of brain tumors
- 14 Lifespan aspects of endocrine disorders
- 15 Metabolic and neurodegenerative disorders across the lifespan
- 16a Psychopathological conditions in children and adolescents
- 16b Psychopathological conditions in adults
- 16c Neuropsychological aspects of psychopathology across the lifespan: a synthesis
- Index
- Plate section
- References
Summary
Introduction
This chapter is about the effects on the central nervous system (CNS) of inborn errors of metabolism (IEM). IEM are a large number of rare genetic disorders caused by biochemical errors. The genes that code for enzymes that convert substances (substrates) into specific products are defective. Disease is caused either by the defect/absence of a specific enzyme that disrupts a metabolic pathway causing abnormal build-up of substrate in cells or by the defect/absence of important proteins or enzymes that help in the synthesis of essential compounds.
Inborn errors of metabolism can be categorized into disorders of carbohydrate metabolism (e.g. galactosemia), amino acid metabolism (e.g. phenylketonuria and maple syrup urine disease), lysosomal storage, peroxisomal function, and a myriad of others not covered in this chapter. Although the majority of IEM have some CNS effects, this chapter will concentrate on lysosomal storage disorders and peroxisomal disorders because of the known CNS effects on neuropsychological function and development in both untreated and treated individuals and because of the advances in diagnosis and treatment with improved outcomes for these categories of diseases.
In the past 25 years, inborn errors of metabolism that affect the CNS have been the first genetic diseases to have effective treatments. The first treatments for these disorders were alterations in diet for a number of these diseases such as phenylketonuria and maple syrup urine disease, resulting in prevention of mental retardation.
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- Publisher: Cambridge University PressPrint publication year: 2010
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