Sensory Processing Disorder (SPD) is a condition that affects how the brain processes and responds to sensory input. This disorder can significantly impact daily life, affecting everything from personal comfort to social interactions and academic performance. SPD is commonly diagnosed in children but can also be present in adults. Understanding the various types of SPD is essential for recognizing the symptoms and seeking appropriate treatment.
In this blog, we will explore the different subtypes of SPD, focusing on their unique characteristics and symptoms.
Types of Sensory Processing Disorder
1. Sensory Modulation Disorder (SMD)
Sensory Modulation Disorder refers to difficulties in regulating responses to sensory input. It involves an individual being either too sensitive or not sensitive enough to stimuli. People with this subtype may be categorized into three distinct groups:
- Sensory Over-Responsivity (Sensory Defensiveness): Individuals with this condition react to sensory stimuli more intensely than expected. For example, they may be overwhelmed by loud noises, bright lights, or certain textures. This heightened sensitivity can lead to emotional outbursts, anxiety, and a tendency to avoid specific environments or activities.
- Sensory Under-Responsivity: On the opposite end of the spectrum, those with under-responsivity may not respond to sensory stimuli in a typical manner. For instance, they may not notice when their name is called, or they may fail to feel pain or hunger, leading to possible safety risks.
- Sensory Craving: This occurs when individuals seek intense sensory experiences. They may engage in behaviors such as constantly moving, seeking out loud sounds, or craving deep pressure touch. This need for heightened sensory input can lead to difficulties in social situations or school environments.
2. Sensory-Based Motor Disorder (SBMD)
Sensory-Based Motor Disorder involves issues related to movement and motor skills. This subtype is often associated with Dyspraxia, which affects motor planning and coordination. Individuals with SBMD may have trouble with everyday tasks that require coordination, such as writing, eating, or tying shoelaces. They may appear clumsy or have difficulty maintaining balance, making it challenging to navigate their environment.
- Postural Disorder: This involves difficulties in maintaining the body’s position, such as sitting upright or standing for long periods. Individuals with postural issues may show poor core stability, affecting their ability to sit or stand without support.
3. Sensory Discrimination Disorder (SDD)
Sensory Discrimination Disorder refers to the inability to correctly interpret and distinguish different sensory inputs. This can affect one or more of the sensory systems and can make it difficult to understand the nature of various stimuli.
- Tactile Discrimination Disorder: People with tactile discrimination issues struggle to identify different textures or objects by touch. They may find it challenging to dress themselves, identify objects in their hands, or interact with various textures.
- Auditory Discrimination Disorder: This type of disorder involves difficulty distinguishing between different sounds or understanding speech in noisy environments. It can impact communication and social interactions, especially in settings like classrooms.
- Visual Discrimination Disorder: Individuals with visual discrimination problems may have trouble distinguishing between different visual stimuli, such as shapes, sizes, or colors. This can affect reading, writing, and daily navigation.
- Vestibular Discrimination Disorder: This disorder affects balance and spatial orientation. People with vestibular issues may have difficulty understanding their position in space, which can lead to coordination problems or dizziness.
- Proprioceptive Discrimination Disorder: This type of disorder involves difficulty sensing the position and movement of the body. It can impact posture, balance, and coordination during physical activities.
- Gustatory Discrimination Disorder: People with gustatory discrimination problems may have difficulty identifying tastes or responding to food textures, which can lead to eating difficulties or sensory-related food preferences.
- Olfactory Discrimination Disorder: This disorder affects the ability to detect and differentiate between smells. It can impact social interactions or safety, especially if the person cannot detect dangerous odors, such as smoke.
- Interoception: Interoception refers to the sense of the internal state of the body, including hunger, thirst, and the need to use the bathroom. Individuals with interoception difficulties may struggle to identify or respond to these internal signals.
Symptoms of Sensory Processing Disorder Subtypes
The symptoms of SPD can vary depending on the subtype. Some common symptoms include:
- Sensory defensiveness: Overreaction to stimuli like loud noises, bright lights, or certain textures
- Clumsiness: Difficulty with motor coordination and balance
- Emotional outbursts: Sudden and intense reactions to sensory input
- Difficulty with fine motor tasks: Struggling with tasks like writing or buttoning a shirt
- Difficulty processing complex sensory input: Trouble distinguishing between different sensations, such as sounds or textures
How to Diagnose Sensory Processing Disorder
Diagnosing SPD typically involves an assessment by an occupational therapist or a healthcare professional. The evaluation includes detailed interviews, observations, and sometimes sensory questionnaires to determine how a person responds to sensory stimuli. It is important to note that SPD is often identified alongside other conditions, such as ADHD or autism spectrum disorder.
Treatment for Sensory Processing Disorders
While SPD can’t be cured, it can be managed effectively through therapies and strategies tailored to the individual’s needs. Sensory integration therapy is one of the most common treatment options, which helps individuals learn to process sensory information more effectively.
For children, strategies such as sensory breaks, deep pressure techniques, and environmental adjustments can also be beneficial. Occupational and ABA therapy also plays a crucial role in providing personalized strategies and tools to manage sensory difficulties.
Conclusion
Sensory Processing Disorder can significantly impact an individual’s daily life, but understanding the different subtypes can help provide clarity in diagnosis and treatment. Whether it’s managing sensory overload, improving motor coordination, or enhancing sensory discrimination skills, personalized interventions are key to improving the quality of life for individuals with SPD.
If you’re seeking support for managing sensory processing challenges, Gold Heart ABA, a team of ABA therapists in New Jersey, offers expert guidance and tailored interventions to meet your needs.