Sensory Terms and what do they really mean
Sensory Processing Disorder or SPD is a complex disorder of the brain which effects both children and adults alike. Sensory processing is how we take in information which we gather through our senses and then process it into things we hear, see, smell, taste and feel. People with sensory processing disorder however gather all this information differently. They can sometimes get too much of the information which is sensory overload or too little which prompts sensory seeking behaviours. These behaviours are catagorised into different sections depending on if they have too much or too little sensory information. Basically there is being under sensitive and over sensitive. These are also referred to as sensory avoiding or sensory seeking. I will stick with under and over for this. Basically under seeking is when the person needs more sensory input to meet their needs and over means they need less. There are the 5 areas of senses and as such different things can effect each person differently. Below are some examples. This is not a full list and there will be many others I'm sure but there are the ones I have personally come across. Again this is just my personal experience and opinion. I am just a mother with a child with autism. I have no medical qualifications or experience.
Sound obviously relates to things we hear. Some one who is under sensitive to sounds may have hearing issues or hearing loss and as such needs volumes to be louder to hear in the same way. They may also only hear in one side. Due to this they may not be able to acknowledge certain sounds and this may be the same without hearing loss. They may enjoy crowded places with lots of noise for the input. For this visual aids can be used to reinforce the sounds and its also good to make people in regular contact aware so they can adjust how they communicate with the person. On the other hand someone who is over sensitive will have sounds amplified. This can cause physical distress to them and may even cause physical pain in to their ears. They can find it difficult to section off sounds and hear things in a muddle so may get easily confused. Background noise can also effect this. As such things like ear defenders can be a useful tool to be used when its known that the area they are in is going to be loud, shutting windows and doors to outside noise if a busy day can also help. My son uses ear defenders quite frequently when he is out and about and this helps reduce his anxiety as the noises are muted and more easily managed.
Someone who is under sensitive to smell can find it difficult to smell aromas and this can most certainly include strong odours. This can cause an issue in older age too with personal hygiene. A person with under sensitivity to smell may also choose to lick things to gain a better sense of the smell. On the flip side to this people who are under sensitive to smells can find regular smells over powering. This can include things like perfume, shampoos and soaps. Flowers can also be included in this. My son hates the smell of lavender plants and as such has a meltdown whenever he is near them. It is simply a smell he cant handle. Fortunately there are plenty of fragrance free items on the market now which can help with toileting routines.
Someone who is under sensitive to taste may like very spicy food or food with a very strong flavour. They may also eat or mouth non food items such as grass or dirt. This is linked to the condition known as Pica. Over sensitive means that flavours can sometimes end up being quite bland in flavour and the lack of strong flavours will usually be obvious in their diets. Another connection to this is the need for certain textures such as only smooth foods. For my son this is obvious with the fact that he will eat only very crunchy foods like toast or very smooth foods like cheese.
Someone who is under sensitive can portray various signs of needing to touch including needing very strong feelings of pressure, a high pain threshold and a possibility of self harm, chews on things including clothing and inedible objects and can also do something called smearing which is when poo is spread across surfaces or themselves. This is due to enjoying the feeling and texture. A way to stop this or to help them is to look at items which are weighted. These come in various items including lap pads, weighted blankets, vests and other items. This weight can be a way to stimulate the touch sense. Chewing can be helped with chew toys and jewellery which is now very common in the autism community and can be found easily online in various places. For the smearing aspect other activities can be tried which will allow them to have the same texture feeling but without the poo!! This can include jelly, cornflour mixtures etc and using them in a tray or bowl so they can manipulate the substance and get the same input. Someone on the other hand who us over sensitive can avoid touching and cuddling for instance. They can feel physical pain at the touch and will shy away from it. They struggle with things like socks and gloves due to the feeling on their feet and can have difficulties with having their hair brushed and washed. They can even find certain food intolerable and certain fabrics and materials will need to be avoided. To help them they can be warned that someone is about to touch them and remember that hugging may not be suitable for them. It may be suitable to change the food textures to something they are more able to manage and look at removing labels and finding materials and fabrics that they are happy with on their skin.
Balance (vestibular) and Body awareness (proprioception)
Balance and proprioception relate also to the body and how it reacts to the environment. Balance can be effected by SPD and body awareness relates to how our bodies move and occupy the space that we are in. In regards to the balance aspect of this a person who is under sensitive may need to rock, swing or spin to get stimulation. Their body awareness may mean that they struggle with understanding personal space and stand to close to people, bump into people and struggle with negotiating areas correctly. For balance under sensitivity you can look at using swings, rocking horses, toys that go round and spin or even just standing up and down on steps. For the body awareness side looking at moving furniture and teaching a rule about one arms length away from people could be a way of gaining understanding. For people who are over sensitive balance can cause issues with travel sickness, controlling movements in games and sports, difficulties stopping an activity. Activities can be broken down into slower steps to make them more manageable. Body awareness with people who are over sensitive it might mean that the person moves their whole body to look at something and struggles with what is classed as fine motor skills. Examples of this are tying shoes laces. There are a lot of activities such as lacing boards which can help with learning fine motor skills and occupational therapist spend a lot of time working with people with motor skill issues to improve these.
Now it is not to be said that if a person displays more over sensitive features that they wont experience under sensitive too. They can and are mixed as with my son. Some areas he is very over sensitive and other very under. We have managed to find many tricks that help him manage in a day. There are lots of ways that this can be done and some of the examples above are just the tip of the iceberg when it comes to sensory input and how to manage sensory issues. You will find quickly what works for your child or young person and what is not useful. SPD is diagnosed by an Occupational Therapist and they will then be able to explain what areas the main concern are for each child separately.