In Autism, Too Many Brain Connections May Be at Root of Condition
Learning, social issues may reflect neuronal miscommunication
A defective gene linked to autism influences how neurons connect and communicate with each other in the brain, according to a study from Washington University School of Medicine in St. Louis. Rodents that lack the gene form too many connections between brain neurons and have difficulty learning.
The findings suggest that some of the diverse symptoms of autism may stem from a malfunction in communication among cells in the brain.
“This study raises the possibility that there may be too many synapses in the brains of patients with autism,” said senior author Azad Bonni, MD, PhD, the Edison Professor of Neuroscience and head of the Department of Neuroscience at Washington University School of Medicine in St. Louis. “You might think that having more synapses would make the brain work better, but that doesn’t seem to be the case. An increased number of synapses creates miscommunication among neurons in the developing brain that correlates with impairments in learning, although we don’t know how.”
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