Sensory processing disorder (SPD) and (ASD) hold similarities and are often confused with one another. While the two have many similarities, SPD is often a co-morbid symptom (the existence of more than one disease or condition within your body at the same time) of ASD. It is important to note that not all children with sensory processing disorder have autism.

Sensory processing disorder (SPD) and (ASD) hold similarities and are often confused with one another. While the two have many similarities, SPD is often a comorbid symptom (the existence of more than one disease or condition within your body at the same time) of ASD. It is important to note that not all children with sensory processing disorder have autism.
So, what is the Autism Spectrum Disorder, also known as Autism?
Autism is a developmental disorder. As children age, there are certain developmental milestones that a child should reach or exceed. When this doesn’t occur per those medical milestones, a pediatrician will make a referral to a specialist for an Autism screening. Whether a diagnosis occurs is based on criteria found within the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, 5th Edition). During the early stages of a child’s development, children begin to communicate and socialize, beginning with their parents, while reacting to and showing emotions. Deficiencies that persist in these areas could be a problem. A child may repeat certain behaviors or have restrictive mannerisms or interests. Some children may show stimming behavior, such as hand flapping or kissing excessive rocking back and forth. Some children may need a toy to be placed in exactly the same spot each time, with a dislike for any disruption or change. Autism can cause a child to learn, react, and attend to details differently. If an intellectual disability or an intellectual developmental disorder is not the sole cause of these deficiencies, this could be a sign of autism. There is no medical test to diagnose Autism. A doctor would need to look at the developmental milestones and the child’s behavior, while taking into account any parental input about the child.
While many people who have autism also learn to manage sensory challenges, sensory processing disorder is not the same as Autism. Sensory processing is the way a person’s brain perceives sensory information and also how that person responds to that information. A person with sensory processing disorder (SPD) has an impairment in the way their brain processes the sensory information that is used to regulate behavior and motor function/performance such as balance, walking, and coordination. They may react to sensory stimuli in a way that is socially or emotionally negative. This may affect their behavior or the way other people respond to them. SPD is said to affect approximately 5-16% of school-aged children in general. Children with SPD may be extremely sensitive to the way certain things feel, look, or sound. These people may be distracted more easily and have difficulty with their fine motor skills. Sensory processing involves a few different components:
- The five senses – taste, smell, hearing, seeing and touch.
- Vestibular function, interoception, and proprioception
Proprioception is a sense of one’s own body movement or position. An example is if a child lifts their hand, they are aware that they are doing that action. Vestibular function is the inner ear and brain working together to help control movement of the eyes, body balance, and one’s awareness of their own body in relation to other objects around them.
Interoception, is the awareness of what is happening within one’s own body. For example, a person can feel how hot or cold an object is through their skin or know when they are thirsty or hungry. Being aware of one’s own heart rate is another example, as well as the link between emotions and the body’s reaction to those feelings.
In regard to sensory issues, most information refers to two types:
1. Hyper sensitivity- when a child is easily stimulated by sensory stimuli. The child may have a low tolerance for pain, some coordination issues, and/or they could be sensitive to certain sights or sounds such as bright lights or noisy appliances. A child with this may also be a finicky eater.
2. Hypo sensitivity- when a child does not have enough sensory stimulation. The child may have a high pain tolerance, may bump into surrounding walls or objects, and may have a need to touch or mouth items.
Sensory processing disorder, is not listed as an “official” disorder in the Diagnostic and Statistical Manual of Mental Disorders – Fifth Edition (DSM-5). Researchers have found that over 80% of children with autism also have sensory processing disorder. One researcher noted that people with SPD don’t show the traits of someone with autism, such as difficulties with social and communication skills or stimming behaviors such as repetitive sounds or movement.
The causes for autism and sensory processing disorders are not known. While there is no cure for autism or SPD, early treatment is better for development, with therapy aiding in speech delays, walking, and social interaction. It is important for parents to find a professional who can provide the correct diagnosis, as early as possible, so children can receive the appropriate treatment. Various skills that a child learns to do at different age levels is called a developmental milestone. The American Academy of Pediatrics recommends that children be screened for general development using standardized, validated tools at 9, 18, and 30 months and for autism at 18 and 24 months or whenever a parent or provider has a concern.” The Individuals with Disabilities Education Act (IDEA) states that a child under the age of 36 months who may have a developmental delay could possibly
qualify for services within their local district.





