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Causes of stuttering in children. We donât really know why stuttering happens. It might be because thereâs an error or delay in the message that a childâs brain sends to the muscles of her mouth when she needs to speak. This error or delay makes it hard for the child to coordinate her mouth muscles when sheâs talking, which results in stuttering.
Researchers are still studying the underlying causes of persistent stuttering. A combination of factors may be involved. Abnormalities in speech motor control. Some evidence indicates that abnormalities in speech motor control, such as timing, sensory and motor coordination, are implicated.