Verbal IQ, overall IQ, and brain volume are lower in children with type 1 diabetes than in their peers without the disorder. Researchers believe the cognitive and brain development differences are associated with hyperglycemia.
Frequent cannabis use was associated with a two point decline in IQ. The decline was primarily related to verbal IQ.
Children with autism show a significant increase in IQ scores between the ages of 12 and 23. Those with the greatest increases in IQ scores had early regressions in language and communication skills by the age of 12.
Higher levels of vitamin D during pregnancy were linked to increased IQ in children.
Study links diabetic ketoacidosis to lower IQ scores and worse memory in children with type 1 diabetes.
Severe adversity experienced in childhood increases the risk of being diagnosed with ADHD later in life.
Efficient connection pathways across the entire brain provide a neural network that supports general cognitive function and ability. Higher fractional anisotropy is associated with higher IQ.
Exposure to flame retardants and pesticides resulted in more than a million cases of intellectual disability in children between 2001 and 2016. However, adverse outcomes from exposure to mercury and lead fell significantly during the same period.
Young adults who faced extreme deprivation as children had, on average, an 8.6% smaller brain size than their peers who did not suffer from deprivation. The deprivation related changes in brain volume were associated with lower IQ and increased ADHD symptoms.
Obesity during pregnancy was associated with lower IQ among boys, but not girls, at age 7. The findings suggest maternal obesity has long=term implications for early cognitive development.
The ability to select specific traits, such as height or IQ, brought about by multiple genes is more complicated than most people realize.
Higher intelligence was associated with higher temporal stability of brain network modularity. Brain regions of the dorsal attention network contributed most to the observed effect.
