Fragile X syndrome is also the most common known cause of autism or autism spectrum disorders. Even the vast majority of individuals who have fragile X syndrome have not been diagnosed, and family members who carry the trait are completely unaware that their unborn children could also be at risk.
What is the difference between fragile X and autism?
Fragile X syndrome causes a range of functioning across domains. It is a specific, identifiable condition with a known genetic cause. Autism spectrum disorder is identified by a cluster of symptoms rather than a specific condition, and is believed to have many causes, most of them unknown.
What is the most common known genetic cause of autism?
Of the genetic variations studied regarding ASD, the most consistently reported genetic abnormalities are mutations in synaptic genes, including neuroligins (NLGN), SH3 and multiple ankyrin repeat domains (SHANK), neurexin (NRXN) families, and contactin associated protein-like 2 (CNTNAP2) [50,51,52,53,54,55,56,57,58,59 …
Does autism worsen with age?
Goldsmiths, University of London researchers working with adults recently diagnosed with autism spectrum disorder have found high rates of depression, low employment, and an apparent worsening of some ASD traits as people age.
What is the root cause of autism?
We know that there’s no one cause of autism. Research suggests that autism develops from a combination of genetic and nongenetic, or environmental, influences. These influences appear to increase the risk that a child will develop autism.
Which parent is responsible for autism?
Researchers have assumed that mothers are more likely to pass on autism-promoting gene variants. That’s because the rate of autism in women is much lower than that in men, and it is thought that women can carry the same genetic risk factors without having any signs of autism.