Related Experiment Video
Updated: Jul 28, 2026

10:02
A Battery of Motor Tests in a Neonatal Mouse Model of Cerebral Palsy
Published on: November 3, 2016
Hereditary spastic diplegia with mental retardation in two young siblings
K H Gustavson1, K Modrzewska, A Erikson
1Department of Clinical Genetics, University Hospital, Uppsala, Sweden.
Clinical Genetics
|December 1, 1989
Summary
This study investigates Böök's syndrome, a rare genetic disorder causing hereditary spastic diplegia and mental retardation. Findings suggest an autosomal recessive inheritance pattern in a family with affected siblings born to consanguineous parents.
Area of Science:
- Genetics
- Neurology
- Pediatrics
Background:
- Hereditary spastic diplegia and mental retardation, known as Böök's syndrome, is a rare genetic disorder.
- Detailed clinical investigations are crucial for understanding rare genetic conditions.
Purpose of the Study:
- To conduct detailed clinical investigations on two siblings with Böök's syndrome.
- To analyze the inheritance pattern of Böök's syndrome within the affected family.
Main Methods:
- Longitudinal clinical assessments of affected siblings since infancy.
- Pedigree analysis to determine the mode of inheritance.
Main Results:
- The investigated family presented with hereditary spastic diplegia and mental retardation (Böök's syndrome).
- The inheritance pattern observed in this family is consistent with autosomal recessive inheritance.
Conclusions:
- Böök's syndrome may follow an autosomal recessive inheritance pattern.
- Consanguineous parental origin in affected siblings supports recessive inheritance.
Related Concept Videos
Pedigree Analysis
Overview
Sex-linked Disorders
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
Genomic Imprinting and Inheritance
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
Autism Spectrum Disorder
Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
Intellectual Disability
Intellectual disability (ID) is a neurodevelopmental condition characterized by deficits in intellectual and adaptive functioning that manifest during the developmental period. This condition encompasses challenges in reasoning, memory, problem-solving, and learning, accompanied by impairments in everyday life skills, such as communication, self-care, and social interactions. Intellectual disability affects approximately 1% of the population in the United States, impacting an estimated 5...
Huntington Disease l: Introduction
Huntington disease or HD is a progressive, fatal neurodegenerative disorder inherited in an autosomal dominant pattern.PathophysiologyIt is caused by expansion of the CAG trinucleotide repeat in the HTT gene on chromosome 4 (4p16.3), producing an abnormal huntingtin protein with an expanded polyglutamine tract. This misfolded protein disrupts cellular function, leading to neuronal death. Normal alleles have ≤26 repeats, 27–35 are intermediate (risk of expansion), 36–39 show reduced penetrance,...

