The exact neurological cause of autism is not fully understood, but it is believed to involve a combination of genetic and environmental factors that affect brain development. Some research suggests that abnormalities in brain structure and function, such as differences in the way neurons communicate and process information, may play a role in the development of autism. Additionally, certain genetic mutations and variations in brain chemistry have been associated with an increased risk of autism. However, more research is needed to fully understand the neurological mechanisms underlying autism.