Final answer:
Autism Spectrum Disorders (ASD) are characterized by deficits in social interaction, communication, and engagement in repetitive behaviors or interests. One neurobiological abnormality in individuals with ASD is the lack of synaptic pruning in the brain.
Step-by-step explanation:
Autism Spectrum Disorders (ASD) encompass a group of developmental brain disorders that are characterized by "deficits in social interaction, verbal and nonverbal communication, and engagement in repetitive behaviors or interests" (National Institute of Mental Health). At a general level, ASD is thought to be a disease of "incorrect" wiring of the brain. One neurobiological abnormality in individuals with ASD is the lack of synaptic pruning that occurs in non-affected individuals. This means that the brains of some ASD patients have too many connections between neurons, which can affect how information is processed and transmitted in the brain.