Sensory Integration Diagnosis Causes and Symptoms and Treatment of SID including Speech Delay Therapy

What is Sensory Integration Disorder (SID)?

Sensory Integration Disorder (SID), also known as Sensory Processing Disorder (SPD), is a neurological condition that arises when the brain is unable to properly process and integrate information from the body’s five basic sensory systems. These sensory systems are responsible for detecting sights, sounds, smells, tastes, temperatures, pain, and the position and movements of the body. The brain combines these inputs to help the body make sense of its environment and react appropriately.

The ongoing relationship between behavior and brain functioning is referred to as sensory integration (SI). Sensory integration provides the foundation for more complex learning and behavior, as it allows the brain to organize and interpret sensory information in a coherent manner.

Sensory Integration Process

Sensory Experiences

Sensory experiences include touch, movement, body awareness, sight, sound, smell, taste, and the pull of gravity. Distinguishing between these different stimuli is the process of sensory integration (SI). While for most people, SI occurs automatically and effortlessly, some individuals experience inefficiency in this process. For these individuals, extensive effort and attention are required for SI to occur, without any guarantee that the integration will be successful. When this process is disrupted, completing tasks becomes difficult, leading to Sensory Integration Disorder (SID).

Normal Development of Sensory Integration

The normal process of SI begins before birth and continues throughout life, with the majority of development occurring before the early teenage years. For most children, sensory integration develops through everyday activities, such as playing, exploring, and learning. However, for some children, sensory integration does not develop as efficiently as it should, resulting in a condition known as Dysfunction in Sensory Integration (DSI). When this process is disordered, it often leads to problems in learning, motor skills, and behavior.

The ability for SI to become more refined and effective coincides with the child’s overall development, which affects how well motor skills, speech, and emotional stability mature.

A. Jean Ayres and Sensory Integration Theory

The concept and theory of sensory integration were developed by A. Jean Ayres, Ph.D., an occupational therapist based in California, USA. Dr. Ayres was fascinated by how sensory processing and motor planning disorders interfered with daily activities and learning. Her research formed the foundation of SI theory, which spurred further studies into how sensory integration supports complex learning and behavior throughout life.

Causes and Symptoms of Sensory Integration Disorder

Causes of Sensory Integration Disorder

The presence of Sensory Integration Disorder (SID) is typically detected in young children. While most children develop sensory integration through regular childhood activities, some children’s SI does not develop efficiently. This inefficiency can result from factors like premature birth, developmental disorders, or brain injuries. Conditions such as autism and ADHD are among the most common contributing factors to SID.

Symptoms of Sensory Integration Disorder

Children with SID may struggle to respond to sensory information appropriately. They might find it difficult to plan and organize their responses to sensory stimuli in an automatic or efficient manner. This often triggers a “fight, flight, or fright” response, which originates from the primitive brain. This response may seem extreme and inappropriate for the situation.

The neurological disorganization resulting from SID can manifest in three ways:

The brain does not receive sensory messages due to neuronal disconnection.
Sensory messages are received inconsistently.
Sensory messages are received consistently but fail to connect properly with other sensory inputs.

When sensory messages are poorly processed, the result is often inefficient motor, language, or emotional output.

Common Signs of Sensory Integration Disorder

According to Sensory Integration International (SII), a non-profit organization that studies the impact of sensory processing issues, the following are common signs of Sensory Integration Disorder (SID):

Over-sensitivity or under-sensitivity to touch, movement, sights, or sounds.
Learning difficulties or delays in academic performance.
Difficulty transitioning between tasks or activities.
Easily distracted or limited attention control.
Unusually high or low activity levels.
Social and/or emotional problems.
Difficulty learning new movements.
Delays in speech, language, or motor skills.
Physical clumsiness or apparent carelessness.
Impulsiveness and lack of self-control.
Difficulty unwinding or calming oneself.
Poor self-concept or body awareness.

Affects Across Different Groups

Although research indicates that sensory integration problems affect up to 70% of children identified by schools as learning disabled, SID is not confined to children with learning disabilities. It is observed across all age groups, intellectual levels, and socioeconomic backgrounds. Factors that contribute to SID include:

Premature birth
Autism
Learning disabilities
Stress-related disorders
Substance abuse (as a result of learning difficulties)
Brain injury

Notably, autism and ADHD are among the most prevalent contributing conditions, along with developmental disabilities and learning disorders such as Specific Learning Difficulties (SLDs).

Diagnosis of Sensory Integration Disorder

Evaluation Process

A diagnosis of Sensory Integration Disorder (SID) requires an evaluation conducted by a qualified occupational or physical therapist. The evaluation usually includes standardized tests and structured observations of how the child responds to sensory stimuli. Tests may assess the child’s posture, balance, coordination, and eye movements. Information from parents, teachers, and other professionals is also gathered to create a comprehensive picture of the child’s condition.

Early Diagnosis and Lifespan Considerations

Sensory processing difficulties are generally recognized in early childhood or adolescence, but they can persist throughout life. Although children with sensory processing disorder may learn coping mechanisms, they do not “outgrow” the condition. The symptoms may become less apparent as they develop strategies to manage their difficulties, but the underlying challenges often remain into adulthood.

Challenges for Children with Sensory Processing Disorder

Children diagnosed with Sensory Processing Disorder (SPD) may face difficulties with the following:

Managing anxiety and stress.
Handling high-stress situations.
Coping with frustration.
Maintaining focus and completing tasks.
Using fine and gross motor skills effectively.

The Importance of Intervention

Early diagnosis and intervention are crucial for children with Sensory Integration Disorder. With the right combination of therapy, support, and interventions tailored to their unique sensory needs, children with SID can learn to manage their condition and lead more fulfilling lives.

Sensory Processing Problems and Coping Abilities

When comparing children’s sensory processing problems with their coping abilities, these difficulties often manifest in a child’s inability to:

Handle new situations.
Adjust to changes in plans or transition smoothly.
Appropriately learn new situations.
Understand the balance between independence and dependence.
Use self-defense successfully.
Maintain an appropriate activity level.
Control impulses.

Sensory Processing Disorder and Associated Diagnoses

Sensory Processing Disorder (SPD) is often associated with other diagnoses, including:

Pervasive developmental disorder or autism spectrum disorders.
Learning disabilities or attention-deficit disorder (ADD/ADHD).
Language disorders.
Behavioral disorders.
Anxiety disorders or depression.

Behaviors Displayed by Children with Sensory Processing Disorder

Children with SPD often display a range of specific behaviors, such as:

Dislike of messy things or reluctance to get dirty.
Avoidance of being touched, hugged, or cuddled.
Excessive desire to touch objects and people, to the point of becoming annoying.
Frequently putting non-food items in their mouth.
Refusal to brush their teeth.
Gagging or discomfort during tooth brushing.

Sensory-Seeking Behavior

Children who are sensory-seeking often crave intense and frequent sensory experiences. This need for sensation may particularly affect the touch systems around the head and face, contributing to over-sensitivity to touch and poor tolerance of activities like brushing teeth or face washing.

Types of Sensory Sensitivity

Sensory Under-Sensitivity

Children with sensory under-sensitivity are often unresponsive or uninterested in sensory experiences. They may exhibit the following behaviors:

Appearing weak, slumping, or leaning on people or furniture.
Having low energy and difficulty waking up.
Getting tired easily and lacking motivation to engage in physical activities.
Performing tasks slowly.
Seeming depressed or emotionally neutral.

Sensory Over-Sensitivity

On the other hand, children with sensory over-sensitivity respond to sensations from one or more sensory systems with exaggerated reactions. Common traits include:

Negative or emotional responses to loud people or places.
Difficulty concentrating in noisy environments.
Frequently humming or making odd noises to block out other sounds.

Some children may feel overwhelmed by their environment and overreact to sounds or even shut them out, appearing as though they are not hearing. Others may make sounds to block out environmental noise, displaying sensory-seeking behavior and craving more intense sensations. Changes in routine or environment can cause discomfort and anxiety for these children.

Sensory Modulation Disorder (SMD)

Sensory Modulation Disorder (SMD) involves difficulty regulating responses to sensory inputs. Children with this disorder may exhibit withdrawal or strong negative reactions to sensory stimuli that do not usually bother others. Emotional regulation becomes problematic, especially when stress levels rise.

Signs of Sensory Modulation Disorder

Easily distracted by sounds.
Extremely sensitive to noises.
Difficulty with falling asleep or staying asleep.
Reacts defensively to light or unexpected touch.
Overly distracted by visual stimuli.
Overactive or hyperactive behavior.
Anger outbursts or emotional volatility.

Sensory Discrimination Disorder (SDD)

Sensory Discrimination Disorder (SDD) is characterized by difficulty recognizing and interpreting differences or similarities in sensory stimuli. It is often associated with processing issues involving touch, muscles, joints, and vestibular sensations.

Signs of Sensory Discrimination Disorder

The child frequently hits or pushes others.
Grips objects with too much force or strength.
Often drops or knocks things over.
Chews, mouths, or sucks on non-food items.
Craves movement, such as spinning or jumping.
Fears heights or dislikes swings and slides.
Exhibits poor balance or clumsiness.

Postural-Ocular Disorder

Postural-Ocular Disorder involves problems with posture control and the quality of movements, often due to low muscle tone or joint instability. These children may struggle with stabilizing their bodies during both rest and movement and often have difficulty using both sides of the body in a coordinated manner.

Signs of Postural-Ocular Disorder

Weakness compared to other children.
Easily exhausted during physical activities.
Constantly moving or shifting position.
Slumping while sitting.
Difficulty making eye contact or tracking objects visually (e.g., during reading).
Clumsiness, often tripping or falling frequently.
A desire for spinning or swinging movements.

Dyspraxia

Children with dyspraxia struggle with planning, sequencing, and executing unfamiliar actions, leading to awkward and poorly coordinated motor skills. Dyspraxia is typically related to a sensory processing deficit and is often observed when children are learning new activities or tasks they perform infrequently.

Signs of Dyspraxia

Difficulty following multi-step directions.
A strong preference for routines or sameness.
Awkward pencil grasp and poor handwriting.
Hesitancy or dislike of sports.
Frequent frustration or emotional outbursts.
Challenges with daily life skills like dressing or using utensils.
Difficulty with transitions between activities or environments.
Trouble navigating playgrounds, playing with new toys, or making certain speech sounds.
Frequent tripping, bumping into objects, or dropping toys.
Challenges imitating simple movements with hands, arms, legs, or mouth.
Possible separation anxiety or difficulty separating from caregivers.

Treatment for Sensory Processing Disorder

Occupational Therapy and Sensory Diet

Occupational therapy is key in treating Sensory Integration Disorder (SID). Sensory integration therapy, sometimes referred to as a sensory diet, provides children with controlled sensory input through a planned schedule of activities designed by an occupational therapist. This “diet” focuses on stimulating the near senses (tactile, vestibular, and proprioceptive) using a blend of alerting, organizing, and calming techniques.

Motor Skills Training

Motor skills training often includes activities such as adaptive physical education, movement education, and gymnastics. These activities help children with SID develop important skills, but a sensory integrative approach that takes into account each child’s unique sensory needs is critical for effective treatment.

Child-Led Motivation in Treatment

An important aspect of the sensory integrative approach is allowing the child to have some control in selecting activities. Children are more motivated and benefit more from activities that provide the sensory input they need, helping them mature and organize sensory information more effectively.

Alternative Treatments

In addition to traditional occupational therapy, alternative treatments for Sensory Integration Disorder (SID) are emerging.

Therapeutic Body Brushing

One common alternative treatment is therapeutic body brushing, often used on children who overreact to tactile stimuli. A specific, non-scratching surgical brush is used to make firm, brisk movements over the body, followed by deep joint compression. The technique, initially taught by an occupational therapist, is often continued by parents several times a day. As the child’s sensitivity improves, the need for brushing decreases.

Recognizing Sensory Integration Disorder

One of the most crucial steps in promoting sensory integration in children is recognizing the existence of Sensory Processing Disorder (SPD) and understanding its vital role in child development. Early diagnosis and appropriate treatment can help children overcome the challenges associated with sensory processing difficulties, enabling them to grow, learn, and thrive.