*Autism

Definition: Autism Spectrum Disorder (ASD) is characterized as a persistent developmental disorder that majorly affects social interaction, communication, and behavior.
Key Features:
- Extreme unresponsiveness to others
- Poor social communication skills
- Rigid and repetitive behavior patterns

Identification Age: Autism is typically identified during the first three years of life, indicating that symptoms manifest early in a child's development.

Prevalence Rate: Approximately 1 in 44 children is diagnosed with Autism Spectrum Disorder.
Gender Disparity: Males are affected at a rate of 4:1 compared to females, showing a significant gender difference in prevalence.

Facial Recognition Challenges: Individuals with autism often have difficulty recognizing faces or the direction of someone’s gaze, which inhibits social interactions.
Response to Parental Cues: There is typically a lack of responsiveness to parental cues, making early attachment difficult.
Play Patterns: Children diagnosed with autism often exhibit a lack of normal play patterns, which further isolates them socially.
Echolalia: Some children may engage in echolalia, which refers to the repetition of words or phrases without understanding their meaning.

Stability Preference: Individuals with autism generally demonstrate a strong preference for a stable and predictable environment; changes in routine can lead to significant distress.
Reaction to Changes: Minor changes in their environment or routine may trigger tantrums or meltdowns, which are believed to be coping mechanisms for overstimulation.

Common repetitive behaviors include:
- Spinning Objects: Mindlessly spinning items around them.
- Flicking Fingers: Repeated finger flicking as a form of stimulation.
- Rocking: Engaging in rocking motions as a self-soothing behavior.
- Self-injury: Certain individuals may exhibit self-injurious behaviors such as head-banging or biting.

Definition: While rare, some individuals with autism may exhibit savant skills, which include exceptional abilities in specific areas such as:
- Calendar calculation
- Perfect memory reproduction (music, poetry, numbers)

Classification: Autism is widely accepted as a neurodevelopmental disorder due to its biological underpinnings.
Structural Brain Differences: Key structural differences noted in the brains of individuals with autism include:
- Brain size that is 5-10% larger than that of neurotypical peers at ages 18-48 months.
- Abnormal development of the prefrontal cortex, which impacts executive functioning and social reasoning.
- Accelerated synaptic pruning, which may disrupt normal brain development and functioning.
- Cerebellum abnormalities which can lead to poor motor skills and challenges with attention shifting.

Genetic Contributors: Research indicates that there are 4-6 major genes associated with autism alongside approximately 30 minor contributors, suggesting a complex genetic basis for the disorder.
Twin Studies: Studies show a higher concordance rate for autism in identical twins as compared to fraternal twins, supporting a significant genetic component.

Definition: A key aspect of autism involves deficits in the Theory of Mind, which refers to the ability to understand and attribute mental states to oneself and others.
Understanding Difficulties: This manifests as a difficulty in understanding:
- What others think
- How others feel
- Reactions to emotional cues
Implications for Social Interaction: These deficits are major contributors to the social and communication difficulties faced by individuals with autism, impacting their ability to interact within social contexts effectively.