Autism spectrum disorder (ASD) is a neurodevelopmental condition that affects how individuals communicate, interact, learn, and behave. It involves a range of challenges with social skills, repetitive behaviors, and communication. The term “spectrum” reflects the broad diversity in how autism presents in each person.

Disruptive Mood Dysregulation Disorder (DMDD) is a childhood mental health condition marked by chronic irritability and frequent, intense outbursts that are out of proportion to the situation. While similar behaviors may appear in children with autism, they often stem from sensory or processing challenges, and the root causes differ even when the two conditions co-occur.

Down syndrome is a genetic disorder caused by the presence of an extra copy of chromosome 21. This additional genetic material affects development and results in the physical and intellectual characteristics associated with the condition. It’s one of the most common chromosomal disorders.

Dyscalculia is a learning disorder that affects a person’s ability to understand and work with numbers. It is sometimes referred to as “number dyslexia” because, like dyslexia for reading, dyscalculia makes it difficult to process mathematical information.

Dysgraphia is a neurological condition that affects writing skills, making it hard to write clearly, spell correctly, and organize thoughts on paper.

Dyspraxia, or Developmental Coordination Disorder (DCD), is a brain-based condition that affects physical coordination and motor skills. People with dyspraxia may struggle with everyday activities such as writing, dressing, or playing sports, and it can also affect their ability to plan, organize, and communicate clearly.

Dyslexia is a neurological learning disability that affects reading, spelling, and writing. It often runs in families and involves difficulty with phonological processing—the ability to recognize and work with the sounds in spoken language.

Anxiety is a normal response to stress, such as relationship changes, public speaking, or major decisions. However, when it becomes persistent and disrupts daily life, it may indicate a mental health disorder. Anxiety and depression often occur together—nearly half of those with depression also have an anxiety disorder.

Mixed receptive-expressive language disorder (MRELD) is a communication disorder that affects both understanding and expressing language. Individuals with MRELD struggle to comprehend spoken language and have difficulty forming words or sentences to communicate clearly.

Obsessive-compulsive disorder (OCD) is a chronic condition marked by uncontrollable, recurring thoughts (obsessions) and repetitive behaviors (compulsions).

Oppositional Defiant Disorder (ODD) is a childhood behavior disorder marked by ongoing uncooperative, defiant, and hostile behavior toward authority figures. Children with ODD often cause more difficulty for others than for themselves.

Sensory processing disorder (SPD) is a condition where the brain struggles to process multisensory input effectively, leading to inappropriate responses to environmental demands. It commonly occurs in individuals with dyspraxia, autism spectrum disorder, and ADHD.

Visual processing disorder (VPD) is a condition that makes it challenging to interpret visual information, even with normal or sharp vision. It’s not a physical disability of the eye but rather a deficit in the brain’s ability to process visual input.