Average Intelligence: Causes & Reasons

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Possible Causes for Average Intelligence

Diastrophic Dysplasia

Most people with diastrophic dysplasia have average intelligence and a normal life expectancy and can expect to lead productive lives. [kidshealth.org]

Spinal Muscular Atrophy Type 1

The brain is not affected, and they have been tested to have at least average to above average intelligence. [smasupport.com]

Some even have above-average intelligence. Encourage your child to take part in as many age-appropriate activities as possible. [healthline.com]

Hearing and vision are not affected, and intelligence is normal or above average. [christopherreeve.org]

Rolandic Epilepsy

Tiziana Zilli, Sergio Zanini, Stefania Conte, Renato Borgatti and Cosimo Urgesi, Neuropsychological assessment of children with epilepsy and average intelligence using NEPSY [doi.org]

RESULT: the obtained data indicate that although intellectual efficiency (measured through the Intelligence Quatient - IQ) was within average, children with rolandic epilepsy [ncbi.nlm.nih.gov]

Learning disability: An abnormal condition affecting children of normal or above-average intelligence, characterized by difficulty in learning fundamentals such as reading [childneurologyfoundation.org]

Adult Spinal Muscular Atrophy

The brain is not affected, and they have been tested to have at least average to above average intelligence. [smasupport.com]

Achondroplasia

No, people with achondroplasia have average intelligence and life expectancy. [growingstronger.org]

However, the symptoms can be managed to improve the individual’s overall quality of life Most individuals reach an average height of 4-5 feet. [dovemed.com]

Intelligence is usually not affected by the mutated FGFR3 gene, and hence, they are able to lead relatively normal lives Preventative measures, appropriate and timely management [dovemed.com]

Pseudoachondroplasia

They have normal intelligence and an average life span. Ongoing medical monitoring is important for people with pseudoachondroplasia. [chop.edu]

Intelligence is normal. The average height of adults is 118 cm (males: 86-127 cm; females 104-122 cm). [rgauk.org]

People with pseudoachondroplasia have normal intelligence, head size, and facial features. [chop.edu]

Spinal Muscular Atrophy

The brain is not affected, and they have been tested to have at least average to above average intelligence. [smasupport.com]

Some even have above-average intelligence. Encourage your child to take part in as many age-appropriate activities as possible. [healthline.com]

When there are no brain abnormalities, the child may have average or above average intelligence, even if there is advanced hydrocephalus at birth. [aans.org]

SHORT Syndrome

[…] to above-average intelligence. [autism-society.org]

Although these children may also possess signs of low blood sugar or obesity, they display average body proportions and (average intelligence. [hgfound.org]

Intelligence or cognitive abilities are unlikely to be affected unless the person has hydrocephalus, or too much fluid around the brain. [medicalnewstoday.com]

Spondyloepimetaphyseal Dysplasia Type Strudwick

The children were judged to be of average intelligence; earlier, mental retardation was thought to be present and to distinguish their disorder from Strudwick dysplasia. [bio2rdf.org]

Mucopolysaccharidosis

Morquio A presents average intelligence, and MPS type VI points to deficits partially related to sensory impairment, implying significant differences between them. [lifescienceglobal.com]

Craniofrontonasal Dysplasia

In conclusion, individuals diagnosed with frontonasal dysplasia usually are of average intelligence and can expect a normal life span. [ruralneuropractice.com]

Mucopolysaccharidosis Type 4A

On clinical examination, the child appeared to have a less than average intelligence but was placid and cooperative. [ijaweb.org]

Hallermann-Streiff Syndrome

The average final height for females is about 60 in (152 cm) and for males it is about 61 in (155 cm). [encyclopedia.com]

Most individuals are of normal intelligence; however, it is estimated that 15-30% of individuals with Hallermann-Streiff syndrome show some degree of mental impairment or [encyclopedia.com]

Rheumatic Chorea

Intellectual impairment has been reported in one family in which affected individuals had intelligence quotient scores averaging 10 points lower than unaffected relatives. [emedicine.medscape.com]

Tricho-Rhino-Phalangeal Syndrome Type 3

intelligence How is Trichorhinophalangeal Syndrome Type I Diagnosed? [dovemed.com]

Intelligence was below average, Speech development was normal, There were no other skin or nail changes. The girl's height was 125 cm and weight was 21 kg. [ijdvl.com]

Dysplasia of the Hip Long philtrum (vertical groove between the nose and upper lip), thin upper lip Medially thick, laterally thin, or absent eyebrows Mild mental retardation, average [dovemed.com]

Tricho-Rhino-Phalangeal Syndrome Type 1

intelligence How is Trichorhinophalangeal Syndrome Type I Diagnosed? [dovemed.com]

Dysplasia of the Hip Long philtrum (vertical groove between the nose and upper lip), thin upper lip Medially thick, laterally thin, or absent eyebrows Mild mental retardation, average [dovemed.com]

Spondyloepimetaphyseal Dysplasia - Abnormal Dentition

[…] and average intelligence (29%). [entokey.com]

[…] usually normal or above average Obesity is a problem Dental crowding and ear problems secondary to bone overgrowth X-Rays All long tubular bones are affected Metaphysis is [flinders.edu.au]

[…] delay, mental retardation, learning difficulties, speech deficit, and behavioral problems. 34 Intellectual function ranges from severe mental retardation (29%) through weak intelligence [entokey.com]

Metaphyseal Chondrodysplasia Type Kaitila

Those affected have an average adult height of 131 centimetres (4 ft 4 in) for males and 123 centimetres (4 ft) for females. [howlingpixel.com]

Intelligence is generally normal.Achondroplasia is due to a mutation in the fibroblast growth factor receptor 3 (FGFR3) gene. [howlingpixel.com]

Parkinson Disease

Parkinson's disease is a form of neurological disorder characterized by gradual loss of those neurological functions that governs body movement. The disease is therefore also referred to as movement disorder. In the early stages of the disease, signs and symptoms are pretty less evident. However, as the disease[…] [symptoma.com]

Syringomyelia

Syringomyelia is a generic term referring to a disorder in which a cyst or cavity forms within the spinal cord. This cyst, called a syrinx, can expand and elongate over time, destroying the spinal cord. The damage may result in loss of feeling, paralysis, weakness, and stiffness in the back, shoulders, and extremities.[…] [en.wikipedia.org]

Motor Neuron Disease

Abstract This report summarizes what we believe to be the first verifiable case of a significant and progressive motor neuron disease (MND) consistent with amyotrophic lateral sclerosis that resolved during treatment with i.v. ceftriaxone plus oral atovaquone and mefloquine. The rationale for use of these[…] [ncbi.nlm.nih.gov]

Amyotrophic Lateral Sclerosis

Amyotrophic lateral sclerosis (ALS) is one of the most common forms of motor neuron diseases. It is also known as “Lou Gehrig's disease”, after a well-known baseball player in New York. The hallmark of the disease is a mixed upper and lower motor neuropathy that is progressive over time. The upper motor signs[…] [symptoma.com]

Chorea Gravidarum

Treatment of a case of severe chorea gravidarum with haloperidol is presented. A possible neuropharmacologic explanation of the beneficial effects of the neuroleptics, particularly haloperidol, is offered based on the dopamine antagonism of these drugs. Heightened dopaminergic activity in the striatum is postulated[…] [ncbi.nlm.nih.gov]

Movement Disorder

Movement disorder Specialty Neurology Psychiatry Movement disorders are clinical syndromes with either an excess of movement or a paucity of voluntary and involuntary movements, unrelated to weakness or spasticity.[1] Movement disorders are synonymous with basal ganglia or extrapyramidal diseases.[2] Movement[…] [en.wikipedia.org]

Craniosynostosis

Craniosynostosis, is a condition, characterized by premature closing of one or more cranial sutures between the bones of the baby’s skull. Such a kind of condition occurs, much before the brain develops fully. Craniosynostosis are of several types; which include sagittal synostosis, frontal plagiocephaly and metopic[…] [symptoma.com]

Osteogenesis Imperfecta Type 13

OMIM : 57 Osteogenesis imperfecta (OI) is a connective tissue disorder characterized by bone fragility and low bone mass. Due to considerable phenotypic variability, Sillence et al. (1979) developed a classification of OI subtypes based on clinical features and disease severity: OI type I, with blue sclerae (166200);[…] [malacards.org]

Russell-Silver Syndrome

Silver-Russell syndrome (SRS) or Russell-Silver syndrome (RSS) is a rare genetic disorder that is presented in children with a small triangular face, low birth weight, slow growth (dwarfism), and limb asymmetry. It was originally described in 1953 by Silver and colleagues and later by Russell in 1954. Genomic aberration in[…] [symptoma.com]

Mucopolysaccharidosis Type 6

Summary Epidemiology Birth prevalence is between 1 in 43,261 and 1 in 1,505,160 live births. Clinical description The disorder shows a wide spectrum of symptoms from slowly to rapidly progressing forms. The characteristic skeletal dysplasia includes short stature, dysostosis multiplex and degenerative joint disease.[…] [orpha.net]

Mucopolysaccharidosis Type 1S

Abstract Multidisciplinary studies were conducted on the brain and other tissues of patients who died with the antemortem diagnosis of mucopolysaccharidosis (MPS) of one of the following types; type V, Scheie disease (MPS-V); type I, Hurler disease (MPS-I): and type II, Hunter disease (MPS-II). The principal new[…] [ncbi.nlm.nih.gov]

Nemaline Myopathy Type 5

J Biol Chem. 2005 Apr 8;280(14):13241-9. Epub 2005 Jan 23. Author information 1 Section of Molecular Cardiology, Evanston Northwestern Healthcare and Northwestern University Feinberg School of Medicine, Evanston, Illinois 60201, USA. Abstract A nonsense mutation at codon Glu180 in exon 11 of slow skeletal muscle[…] [ncbi.nlm.nih.gov]