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'''Sensory defensiveness''' is a condition defined as having "a tendency to react negatively or with alarm to sensory input which is generally considered harmless or non-irritating" to [[neurotypical]] persons.<ref>Wilbarger, Patricia and Wilbarger, Julia. (1991). ''Sensory Defensiveness in Children Aged 2-12: An Intervention Guide for Parents and Other Caretakers''.</ref>
'''Sensory Defensiveness''' is defined as having an anxious reaction to what a [[Neurotypical]] would consider non-noxious sensory stimuli. In other words, a person is sensory defensive if he/she has a negative reaction to sensory input that is typically considered either positive or at least neutral. It is not uncommon for individuals to have a few mild sensory defensive traits. When multiple defensive traits that impact the person's day-to-day life are present, that person is considered to be Sensory Defensive.
 
   
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It is not uncommon for individuals to have a few mild sensory defensive traits. However, when multiple defensive traits impact the person's day-to-day life, that person is considered to be Sensory Defensive.
==Some Common Symptoms (and Variations)==
 
Common symptoms of Sensory Defensiveness include intolerance of high-pitched noises, intolerance of overhead lights (especially fluorescent lighting); experiencing a feeling of being attacked upon being touched (especially from light touch or sudden touch); intolerance of certain types of fabrics in contact with the skin; becoming nauseated upon smelling something that does not smell bad to normal individuals; difficulty maintaining eye-contact; intolerance of foods due to taste, texture, or temperature; and generally becoming overwhelmed when exposed to a lot of sensory stimuli at once.
 
   
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==Symptoms==
Intolerance in this context should not be taken as unwillingness to be subject to the sensory stimuli in question; rather, it is an inability to process the sensory stimuli in any way other than as over-stimulating, because the sensory stimuli provokes a fight-or-flight reaction. This is also known as [[sensory overload]].
 
 
Common symptoms of sensory defensiveness include intolerance of high-pitched noises, intolerance of overhead lights (especially fluorescent lighting); experiencing a feeling of being attacked upon being touched (especially from light touch or sudden touch); intolerance of certain types of fabrics in contact with the skin; becoming nauseated upon smelling something that does not smell bad to normal individuals; difficulty maintaining eye-contact; severe intolerance of foods due to taste, texture, or temperature; and generally becoming overwhelmed when exposed to a lot of sensory stimuli at once.
   
 
Intolerance in this context should not always be taken as unwillingness to be subject to the sensory stimuli in question; rather, intolerance is an inability to process the sensory stimuli in any way other than as over-stimulating, because the sensory stimuli provokes a [[fight-or-flight]] reaction. This is also known as [[sensory overload]].
There are multiple ways in which sensory defensiveness can vary between individuals. 1) The senses that are problematic for one person may not be so for another. (Commonly, individuals report major issues with two or three senses and minor issues with the other senses.) 2) How easily and the way in which a particular sense bothers individuals varies (e.g. high-pitched noises may annoy someone, or they may hurt his/her ears; touch may provoke anxiety, or it can be painful). 3) The triggers for a
 
particular sense vary between people (e.g. one person may be sensitive to the texture of mushy foods, while another may be sensitive to crunchy foods).
 
   
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Sensory defensiveness can vary between individuals:
==Effects and Treatment==
 
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#The senses that are problematic for one person may not be so for another. (Commonly, individuals report major issues with two or three senses and minor issues with the other senses.)
[[Sensory overload]] can lead to what is commonly termed a "melt-down". This may look much like a tantrum, or a person may undergo [[Dissociation (psychology)|dissociation]], which causes him/her to withdraw into himself/herself. Individuals will often cope with their sensory difficulties by avoiding those situations that cause them irritation. [[Occupational therapists]] often prescribe "sensory diets". This is a therapy that is tailored to the individual in which he/she gets to experience calming sensory stimuli that help to balance his/her sensory system. [http://www.isna.de/index2e.html Snoozelin rooms],in which sensory experiences can be controlled and explored, are sometimes used. Individuals will often naturally create or find their own calming sensory stimuli (called "stims" in the [[autistic community]]) or sensory diets.
 
 
#How easily and the way in which a particular sense bothers individuals varies (e.g. high-pitched noises may annoy someone, or they may hurt his/her ears; touch may provoke anxiety, or it can be painful).
 
#The triggers for a particular sense vary between people (e.g. one person may be sensitive to the texture of mushy foods, while another may be sensitive to crunchy foods).
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==Causes==
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There are believed to be multiple [[etiology|etiologies]] for sensory defensiveness, including [[human genetics|genetic factors]], environmental conditioning, [[drug abuse|drug]] or [[alcohol abuse]], [[sexual abuse]], or [[premature birth]]. <ref>{{cite journal |author=Kinnealey M, Oliver B, Wilbarger P |title=A phenomenological study of sensory defensiveness in adults |journal=Am J Occup Ther |volume=49 |issue=5 |pages=444–51 |year=1995 |pmid=7598160 |doi=}}</ref> Those diagnosed with [[attention deficit hyperactivity disorder]] report much higher than average rates of hypersensitivity to sensory stimulus.<ref>Johnson, Mary Jane. [http://www.add.org/articles/hypersen.html Having ADD and Being Hypersensitive: Is There A Connection?] Attention Deficit Disorder Association (1998). Retrieved on [[2007-11-27]].</ref>
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==Effects and treatment==
 
[[Sensory overload]] can lead to what is commonly termed a "melt-down". This may look much like a tantrum, or a person may undergo [[Dissociation (psychology)|dissociation]], which causes him/her to withdraw into himself/herself. Individuals will often cope with their sensory difficulties by avoiding those situations that cause them irritation. [[Occupational therapists]] often prescribe "sensory diets". This is a therapy that is tailored to the individual in which he/she gets to experience calming sensory stimuli that help to balance his/her sensory system. [[Snoezelen]] rooms, in which sensory experiences can be controlled and explored, are sometimes used. Individuals will often naturally create or find their own calming sensory stimuli ([[stimming|stims]]) or sensory diets.
 
 
 
The other side to these issues is that many people report a positively heightened awareness of their senses, under the right conditions. They also promote "stims", which can include music, exercise, and any other pleasing sensory stimulation, as natural means of reducing stress.
 
The other side to these issues is that many people report a positively heightened awareness of their senses, under the right conditions. They also promote "stims", which can include music, exercise, and any other pleasing sensory stimulation, as natural means of reducing stress.
   
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==Component of other disorders==
==The Connection with Sensory Integration Dysfunction and Autism==
 
Sensory Defensiveness is a part of [[Sensory Integration Dysfunction]]. Sensory Integration Dysfunction is considered to be part of the [[autism spectrum]], but a person does not have to display any other autistic traits in order to have Sensory Defensiveness or Sensory Integration Dysfunction. Sensory integration issues are also common with [[dyspraxia]], [[cerebral palsy]][http://www.about-cerebral-palsy.org/treatment-therapy/sensory-integration.html], and [[Fetal Alcohol Spectrum Disorder]].<ref>Malbin, D. (1993). ''Fetal Alcohol Syndrome, Fetal Alcohol Effects: Strategies for Professionals''. Center City, MN: Hazelden. ISBN 0-89486-951-5.</ref>
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Sensory defensiveness is a part of [[Sensory Integration Dysfunction]]. Sensory Integration Dysfunction is considered a symptom of the [[autism spectrum]], but a person does not have to display other autistic traits to have sensory defensiveness or sensory integration dysfunction. Sensory integration dysfunction and defensiveness are also common with [[developmental dyspraxia]], [[cerebral palsy]],<ref>[http://www.about-cerebral-palsy.org/treatment-therapy/sensory-integration.html Sensory Integration Therapy for Cerebral Palsy.] About cerebral palsy. Retrieved on [[2007-11-27]].</ref> and [[fetal alcohol syndrome]].<ref>Malbin, D (1993). ''Fetal Alcohol Syndrome, Fetal Alcohol Effects: Strategies for Professionals''. Center City, MN: Hazelden. ISBN 0-89486-951-5.</ref>
   
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==See also==
==Literature and Resources==
 
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*[[Defensiveness]]
Sharon Heller's book, ''Too Loud, Too Bright, Too Fast, Too Tight: What to Do If You Are Sensory Defensive in an Overstimulating World'' (ISBN 0-06-093292-9),is the only lay book that has been written specifically about Sensory Defensiveness in adults.
 
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*[[Sensory integration]]
   
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==References==
Symptoms, background information, and treatment of Sensory Defensiveness in adults are addressed in the manual and handbook of "The Sensory Connection Program: Activities in Mental Health Treatment" authored by Karen Moore, OTR/L. Information on Sensory Defensiveness is also available on the website www.sensoryconnectionprogram.com.
 
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{{reflist}}
   
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==Further reading==
Olga Bogdashina's "Sensory Perceptual Issues in Autism and Asperger's Syndrome: Different Sensory Experiences, Different Perceptual Worlds" provides a good overview of sensory traits in the autism spectrum.
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* Bogdashina, Olga. ''Sensory Perceptual Issues in Autism and Asperger's Syndrome: Different Sensory Experiences, Different Perceptual Worlds''. An overview of sensory traits in the autism spectrum.
 
* Heller, Sharon. ''Too Loud, Too Bright, Too Fast, Too Tight: What to Do If You Are Sensory Defensive in an Overstimulating World'' (ISBN 0-06-093292-9) The only lay book written specifically about Sensory Defensiveness in adults.
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* Moore, Karen. ''The Sensory Connection Program: Activities in Mental Health Treatment''. Symptoms, background information, and treatment of Sensory Defensiveness in adults
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* Wilbarger, Patricia and Julia. ''Sensory Defensiveness in Children Aged 2-12: An Intervention Guide for Parents and Other Caretakers''. Explains the roots of sensory defensiveness in children.
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* [http://findarticles.com/p/articles/mi_m2843/is_6_24/ai_66496173 On Inventing Your Own Disorder]
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* [http://www.srmhp.org/0101/autism.html Separating Fact from Fiction in the Etiology and Treatment of Autism - A Scientific Review of the Evidence]
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* [http://www.quackwatch.org/01QuackeryRelatedTopics/sid.html Why "Sensory Integration Disorder" Is a Dubious Diagnosis]
   
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[[Category:Syndromes]]
 
[[Category:Autism]]
 
[[Category:Autism]]
{{enWP|Sensory defensiveness]]
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{{enWP|Sensory defensiveness}}

Revision as of 12:58, 2 August 2008

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Sensory defensiveness is a condition defined as having "a tendency to react negatively or with alarm to sensory input which is generally considered harmless or non-irritating" to neurotypical persons.[1]

It is not uncommon for individuals to have a few mild sensory defensive traits. However, when multiple defensive traits impact the person's day-to-day life, that person is considered to be Sensory Defensive.

Symptoms

Common symptoms of sensory defensiveness include intolerance of high-pitched noises, intolerance of overhead lights (especially fluorescent lighting); experiencing a feeling of being attacked upon being touched (especially from light touch or sudden touch); intolerance of certain types of fabrics in contact with the skin; becoming nauseated upon smelling something that does not smell bad to normal individuals; difficulty maintaining eye-contact; severe intolerance of foods due to taste, texture, or temperature; and generally becoming overwhelmed when exposed to a lot of sensory stimuli at once.

Intolerance in this context should not always be taken as unwillingness to be subject to the sensory stimuli in question; rather, intolerance is an inability to process the sensory stimuli in any way other than as over-stimulating, because the sensory stimuli provokes a fight-or-flight reaction. This is also known as sensory overload.

Sensory defensiveness can vary between individuals:

  1. The senses that are problematic for one person may not be so for another. (Commonly, individuals report major issues with two or three senses and minor issues with the other senses.)
  2. How easily and the way in which a particular sense bothers individuals varies (e.g. high-pitched noises may annoy someone, or they may hurt his/her ears; touch may provoke anxiety, or it can be painful).
  3. The triggers for a particular sense vary between people (e.g. one person may be sensitive to the texture of mushy foods, while another may be sensitive to crunchy foods).

Causes

There are believed to be multiple etiologies for sensory defensiveness, including genetic factors, environmental conditioning, drug or alcohol abuse, sexual abuse, or premature birth. [2] Those diagnosed with attention deficit hyperactivity disorder report much higher than average rates of hypersensitivity to sensory stimulus.[3]

Effects and treatment

Sensory overload can lead to what is commonly termed a "melt-down". This may look much like a tantrum, or a person may undergo dissociation, which causes him/her to withdraw into himself/herself. Individuals will often cope with their sensory difficulties by avoiding those situations that cause them irritation. Occupational therapists often prescribe "sensory diets". This is a therapy that is tailored to the individual in which he/she gets to experience calming sensory stimuli that help to balance his/her sensory system. Snoezelen rooms, in which sensory experiences can be controlled and explored, are sometimes used. Individuals will often naturally create or find their own calming sensory stimuli (stims) or sensory diets.

The other side to these issues is that many people report a positively heightened awareness of their senses, under the right conditions. They also promote "stims", which can include music, exercise, and any other pleasing sensory stimulation, as natural means of reducing stress.

Component of other disorders

Sensory defensiveness is a part of Sensory Integration Dysfunction. Sensory Integration Dysfunction is considered a symptom of the autism spectrum, but a person does not have to display other autistic traits to have sensory defensiveness or sensory integration dysfunction. Sensory integration dysfunction and defensiveness are also common with developmental dyspraxia, cerebral palsy,[4] and fetal alcohol syndrome.[5]

See also

References

  1. Wilbarger, Patricia and Wilbarger, Julia. (1991). Sensory Defensiveness in Children Aged 2-12: An Intervention Guide for Parents and Other Caretakers.
  2. Kinnealey M, Oliver B, Wilbarger P (1995). A phenomenological study of sensory defensiveness in adults. Am J Occup Ther 49 (5): 444–51.
  3. Johnson, Mary Jane. Having ADD and Being Hypersensitive: Is There A Connection? Attention Deficit Disorder Association (1998). Retrieved on 2007-11-27.
  4. Sensory Integration Therapy for Cerebral Palsy. About cerebral palsy. Retrieved on 2007-11-27.
  5. Malbin, D (1993). Fetal Alcohol Syndrome, Fetal Alcohol Effects: Strategies for Professionals. Center City, MN: Hazelden. ISBN 0-89486-951-5.

Further reading

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