The corpus callosum is the thick band of nerve fibers that connects the left and right hemispheres of the brain, acting like a superhighway to allow communication between the two sides. Given its role in integrating information, researchers have long speculated that the size and structure of the corpus callosum may be linked to intellectual …
Researchers have long suspected that brain size affects intelligence, with people who have bigger brains tending to have higher IQs. A new set of studies provides compelling evidence that this relationship is likely causal and not just correlational. Key Takeaways: Among siblings, the one with the larger brain size tends to have the higher IQ. …
A systematic review and meta-analysis published in Scientific Reports evaluated the potential association between chronic fluoride exposure and neurological damage. The study aimed to analyze the impact of fluoride from different sources on neurological disorders in humans. After a thorough literature search, the authors included 27 observational studies in the qualitative analysis. The results showed …
A new review of research finds strong evidence that fluoride exposure, especially during fetal development and infancy, can lead to decreased IQ and other neurotoxic effects. While fluoride may help prevent dental cavities when applied topically, ingesting elevated levels early in life appears to pose risks to long-term brain health. Key facts: Multiple recent studies …
Researchers have found that more intelligent narcissists are less likely to exhibit rivalry and aggression. This suggests higher intelligence may help mitigate some of the negative interpersonal behaviors associated with narcissism. Key Facts: Narcissism has two main dimensions – admiration and rivalry. Admiration involves self-promotion, while rivalry involves aggression and devaluation of others. These two …
A new study provides unprecedented insights into the brains and cognitive capabilities of dinosaurs and other prehistoric reptiles. The key takeaways: Many theropod dinosaurs like T. rex had brains as large and complex as monkeys and primates. This suggests they were likely as intelligent as modern primates. However, other dinosaurs like sauropods had much smaller, …
