Definition of Terms


Continuum of Developmental Disorders:


Sensory Processing Disorder (SPD) is a neurological disorder that causes difficulty in processing and integrating information from sensory inputs, motor outputs and spatial positioning. The branches include:

Sensory Modulation Disorder (SMD) – Children are either overwhelmed or under-whelmed by sensation and exhibit hyperactivity in response.

  • Sensory over-responsivity (SOR) – for example, dislikes clothing of certain textures.
  • Sensory under-responsivity (SUR) – can be disruptive in seeking stimuli
  • Sensory seeking (SS) – extreme hyperactivity


Sensory Discrimination Disorder (SDD) – Children often use excessive force in interacting with people or objects due to poor recognition of different levels within each sense. For example, the child will grab objects too tightly or use too much force.

Sensory-Based Motor Disorder (SBMD) – Children are often perceived as being weak due to their poor posture, difficulty in conducting routine daily activities, and their extreme frustration.

  • Postural Disorders – weakness, fatigue and poor posture
  • Dyspraxia – problems using utensils

Source: Information Provided by the SPD Foundation


Autism is a brain development disorder that impairs social interaction and communication, and causes restricted and repetitive behavior, all starting before a child is 3 years old.

Asperger Syndrome is one of several autism spectrum disorders (ASD) characterized by difficulties in social interaction and by restricted, stereotyped interests and activities. AS is distinguished from the other ASDs in having no general delay in language or cognitive development. Although not mentioned in standard diagnostic criteria, motor clumsiness and atypical use of language are frequently reported.

Attention Deficit Hyperactivity Disorder (ADHD)/ Attention Deficit Disorder (ADD) is a neurobehavioral developmental disorder affecting approximately 5% of the world's population. It typically presents itself during childhood, and is characterized by a persistent pattern of inattention and/or hyperactivity, as well as forgetfulness, poor impulse control or impulsivity, and distractibility.

Source: Wikipedia.com

NOTE: The following information is not intended to provide any type of professional advice or diagnostic service. If you have any concerns about any of the disorders mentioned or other health issues, please consult a qualified healthcare professional in your community.