Definition: Autism is a general term for a group of complex disorders of brain development. These disorders are characterized, in varying degrees, by difficulties in social interaction, verbal and nonverbal communication and repetitive behaviours. In recent times all autism disorders were merged into one umbrella diagnosis of Autism spectrum disorders (ASD).
Symptoms and Treatment: Autism spectrum disorders (ASD) are characterized by social-interaction difficulties, communication challenges and a tendency to engage in repetitive behaviors. However, symptoms and their severity vary widely across these three core areas. Taken together, they may result in relatively mild challenges for someone on the high functioning end of the autism spectrum. Each child or adult with autism is unique so, each autism intervention plan should be tailored to address specific needs. Intervention can involve behavioral treatments, medicines or both. Many persons with autism have additional medical conditions such as sleep disturbance, seizures and gastrointestinal (GI) distress. Addressing these conditions can improve attention, learning and related behaviors.
Statistics: In Sweden statistical analysis were given as two studies using 1000 Hz tones showed faster cortical latencies with varying tone durations. Ferri and colleagues utilized a 100ms tone, and Martineau and colleagues used a 4ms tone. Others have shown delayed latencies relative to controls. Bruneau and colleagues showed late AEPs with a 750Hz tone and 200ms duration; Oram Cardy and colleagues found the same delay with a 1kHz tone and 300ms duration; and Roberts and colleagues, using MEG, report a delay in right hemisphere M100 response to 300ms tones over a range of frequencies (200, 300, 500, and 1000Hz).