Average Intelligence: Causes & Reasons

Possible Causes for Average Intelligence

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]

Craniofrontonasal Dysplasia

In conclusion, individuals diagnosed with frontonasal dysplasia usually are of average intelligence and can expect a normal life span. [ncbi.nlm.nih.gov]

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]

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]

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 Type 4A

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

Russell-Silver Syndrome

This is supported by results from a new study of 10 patients with SRS who have been shown to have average intelligence (assessed using the full-scale IQ).39 While there were [jmg.bmj.com]

Intellectual functioning in 10 adult patients with SRS due to 11p15 loss of methylation was assessed by Full Scale Intelligence Quotient and was in the average range, but [frontiersin.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]

Case report The case involved a 50 year old Hindu woman, 121 cm in height, weighing 22 kg., and possessing average intelligence. [ijo.in]

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]

Nager Syndrome

The intelligence of the affected group was found to be generally above average and not significantly different from that of the control group. [cambridge.org]

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]

Parkinson Disease

Overview Parkinson's disease is a progressive disorder that affects the nervous system and the parts of the body controlled by the nerves. Symptoms start slowly. The first symptom may be a barely noticeable tremor in just one hand. Tremors are common, but the disorder may also cause stiffness or slowing of[…] [mayoclinic.org]

Syringomyelia

Summary Syringomyelia is a rare disorder that causes a cyst to form in your spinal cord. This cyst, called a syrinx, gets bigger and longer over time, destroying part of the spinal cord. Damage to the spinal cord from the syrinx can cause symptoms such as : Pain and weakness in the back, shoulders, arms or legs[…] [medlineplus.gov]

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

According to Willson and Preece,1 the first description of chorea with onset during pregnancy (chorea gravidarum) was made by Horstius in 1661. The English translation of the Latin work provided in their article, however, indicates that the woman described by Horstius in fact developed chorea at the puerperium. This[…] [jamanetwork.com]

Movement Disorder

ODD AND UNUSUAL MOVEMENT DISORDERS Free Andrew J Lees Correspondence to:  Professor AJ Lees, Reta Lila Weston Institute of Neurological Studies, Royal Free and University College London Medical School, Windeyer Institute of Medical Science, 46 Cleveland Street. London W1T 4JF, UK;  a.lees{at}ion.ucl.ac.uk Statistics[…] [jnnp.bmj.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]

Craniosynostosis

About Craniosynostosis General Information Craniosynostosis refers to premature closure of cranial sutures, or joints between the bones of the skull. The condition has medical consequences only when it occurs abnormally early in development. Craniosynostosis occurs approximately once per 1,900 live births, with[…] [uclahealth.org]

Osteogenesis Imperfecta Type 13

References Bonadio J, Ramirez F, Barr M (1990) An intron mutation in the human α1(I) collagen gene alters the efficiency of pre-mRNA splicing and is associated with osteogenesis imperfecta type II. J Biol Chem 265:2262–2268 Google Scholar Byers PH, Wallis GA, Willing MC (1991) Osteogenesis imperfecta: translation of[…] [link.springer.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

Path to MPS Diagnosis Our service is ideal for the identification of Mucopolysaccharidosis in at-risk patients showing specific clinical symptoms or for an individual or family member who has a family history of MPS. Testing is fast and safe using Dried Blood Spot (DBS) cards. This simple and minimally invasive technique[…] [archimedlife.com]