Tactile defensiveness: how to do sensory enriched touch?

Tactile defensiveness: how to do sensory enriched touch

Introduction

 

Have you ever wondered why Sensory Enrichment Therapy uses the senses of touch and smell in so many of its exercises in so many of its exercises? The reason is simple: Studies have shown that when soft, pleasant touch is combined with smell, it helps increase the plasticity of the brain and its ability to compensate for damage and various dysfunctions.

Tactile defensiveness

The challenge with presenting soft touch experiences to individuals with neurological deficits, however, is that they often have difficulties processing sensory inputs, including the sense of touch.

Tactile defensiveness (TD) is a label used to describe negative and out of proportion behaviors in response to certain types of touch experiences that most people tolerate and even enjoy. [1–4]

sensory issues in toddlers with socks

A recent study showed that the cause of these negative and out of proportion behaviors is abnormal patterns of white matter growth were discovered in the brains of individuals with Autism Spectrum Disorder (ASD). The study further explained that the abnormal patterns of white matter growth cause the normal tactile inputs to be re-routed towards the sensory cortex area that processes pain making soft touch a rarely pleasurable experience for individuals with ASD [5]. Instead, individuals with autism often prefer and seek out deep pressure and tight squeezes. These preferences are the result of a deficit in the tactile processing system. [6–9]

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In another study, published in 2015 [10], scientists explain that soft touch sensations applied between the wrist and the elbow of a person’s forearm are processed by the prefrontal cortex (responsible for social awareness) and amygdala (responsible for emotion control), whereas sensory input to the palm of the hand is processed by the parietal lobe (responsible for the identification of texture and temperature). Consequently, soft touch on the forearm evokes an individual’s awareness of others and promotes emotional control.

In autism, where social skills are usually underdeveloped, those soft touches on the forearm do not elicit activation in the same way as neurotypical individuals and they do not have a social significance.

It is important for children with autism to develop a functional level of tactile processing so that they can gain a greater understanding of social awareness and emotional control associated with soft touch.

Two enrichment strategies to use with individuals with tactile defensiveness

Strategy 1: Active vs. passive touch

Mendability offers many Sensory Enrichment Therapy protocols that help rehabilitate the sense of touch. The good news is that while children with autism may sometimes fight a soft cuddle, they will have no problem looking for a desired toy hidden in a bowl of raw rice, or manipulating a textured ball.

In this mode, instead of touching the recipient, you invite the recipient to touch and explore different textures.

Sample Sensory Enrichment Game - Smell and Feel 4 Textures

Using the natural curiosity of an individual, Mendability elaborates activities which will help restore proper communication between the receptors on the skin and their final destinations in the cortex.

Many parents report that after only weeks of participating in the therapy, their autistic child tolerates haircuts, teeth brushing, dressing, and even accepts new foods that were previously rejected because of their textures. This also works for adults who have lived their whole lives avoiding and dreading certain tactile experiences.

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Strategy 2: Progressive stimulation

When we look at the map of the brain, we can see that there are typically more connections to deal with the hands, lips, and face. Understanding this sensory mapping helps us design effective enrichment protocols. For example, when working on rehabilitating the sense of touch we know where to start. We know we can predictably rely on most individuals to be comfortable with tactile stimulation around the hands.

With Sensory Enrichment Therapy, for a few minutes each day, you can softly touch the child’s fingertips while offering a pleasant scent to smell. When the child is comfortable with the fingertips, move on to the palms of the hands and soles of the feet, then gradually progress to the person’s arm, back, neck, or head.

Occupational therapy activities - sensory processing - spd

You could, for example, run the tip of a pencil around the palm of the person’s hand and then along each finger. You could also try playing a painting game by taking a paint brush and pretending to dab the brush on your shirt to pick up the color. Once the color is ‘picked up’ from your shirt, you can then pretend to paint a stroke of that color somewhere on the recipient’s hand, or forehead (depending on where the person is comfortable).

With regular exposure and experience, the child develops a real enjoyment of the process, a stronger connection with parents, and a feeling of relaxation. This protocol can rapidly become one of the child’s favorite experiences. [11]

In the case of touch, Sensory Enrichment Therapy aims at rehabilitating the processing of soft touch, rather than de-sensitizing [12] it as is widely prescribed currently. Once rehabilitated, touch can be used for many other therapeutic purposes.

Summary

The sense of touch plays a vital role in therapy. When combined with smell, it helps increase the plasticity of the brain and its ability to compensate for damage and various dysfunctions.

Be attentive to the therapy recipient’s preferences and let them lead you. It may take a few days of exploring before you can identify the best way and the best place to do the tactile protocols.

In this article, we reviewed strategies that help individuals with tactile defensiveness so that they can also implement soft touch exercises, and reap the benefits of an increase in brain plasticity and improved brain function.

References

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