Misophonia: Difference between revisions

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Misophonia's mechanism is not known, but it appears that, like [[hyperacusis]], it may be caused by a dysfunction of the [[Auditory system#Central auditory system|central auditory system]] in the brain and not of the ears.<ref name=":1" /><ref name="Bruxner2016rev">{{cite journal | vauthors = Bruxner G | title = 'Mastication rage': a review of misophonia - an under-recognised symptom of psychiatric relevance? | journal = Australasian Psychiatry | volume = 24 | issue = 2 | pages = 195–7 | date = April 2016 | pmid = 26508801 | doi = 10.1177/1039856215613010 | s2cid = 7106232 }}</ref> The perceived origin and context of the sound appears to be essential to trigger a reaction.<ref name="Bruxner2016rev" />
Misophonia's mechanism is not known, but it appears that, like [[hyperacusis]], it may be caused by a dysfunction of the [[Auditory system#Central auditory system|central auditory system]] in the brain and not of the ears.<ref name=":1" /><ref name="Bruxner2016rev">{{cite journal | vauthors = Bruxner G | title = 'Mastication rage': a review of misophonia - an under-recognised symptom of psychiatric relevance? | journal = Australasian Psychiatry | volume = 24 | issue = 2 | pages = 195–7 | date = April 2016 | pmid = 26508801 | doi = 10.1177/1039856215613010 | s2cid = 7106232 }}</ref> The perceived origin and context of the sound appears to be essential to trigger a reaction.<ref name="Bruxner2016rev" />


A 2017 study<ref>{{cite journal | vauthors = Kumar S, Tansley-Hancock O, Sedley W, Winston JS, Callaghan MF, Allen M, Cope TE, Gander PE, Bamiou DE, Griffiths TD | display-authors = 6 | title = The Brain Basis for Misophonia | journal = Current Biology | volume = 27 | issue = 4 | pages = 527–533 | date = February 2017 | pmid = 28162895 | pmc = 5321671 | doi = 10.1016/j.cub.2016.12.048 }}</ref> found that the anterior [[insular cortex]] (which plays a role both in emotions like anger and in integrating outside input, such as sound, with input from organs such as the heart and lungs) causes more activity in other parts of the brain in response to triggers, particularly in the parts responsible for long-term memories, fear, and other emotions. It also found that people with misophonia have higher amounts of [[myelin]] (a fatty substance that wraps around nerve cells in the brain to provide electrical insulation). It is not clear whether myelin is a cause or an effect of misophonia and its triggering of other brain areas.<ref>{{cite web | vauthors = Cartreine J |title=Misophonia: When sounds really do make you "crazy" |url=https://www.health.harvard.edu/blog/misophonia-sounds-really-make-crazy-2017042111534 |website=Harvard Health Blog |date=21 April 2017}}</ref>
A 2017 study <ref>{{cite journal | vauthors = Kumar S, Tansley-Hancock O, Sedley W, Winston JS, Callaghan MF, Allen M, Cope TE, Gander PE, Bamiou DE, Griffiths TD | display-authors = 6 | title = The Brain Basis for Misophonia | journal = Current Biology | volume = 27 | issue = 4 | pages = 527–533 | date = February 2017 | pmid = 28162895 | pmc = 5321671 | doi = 10.1016/j.cub.2016.12.048 }}</ref> found that the anterior [[insular cortex]] (which plays a role both in emotions like anger and in integrating outside input, such as sound, with input from organs such as the heart and lungs) causes more activity in other parts of the brain in response to triggers, particularly in the parts responsible for long-term memories, fear, and other emotions. It also found that people with misophonia have higher amounts of [[myelin]] (a fatty substance that wraps around nerve cells in the brain to provide electrical insulation). It is not clear whether myelin is a cause or an effect of misophonia and its triggering of other brain areas.<ref>{{cite web | vauthors = Cartreine J |title=Misophonia: When sounds really do make you "crazy" |url=https://www.health.harvard.edu/blog/misophonia-sounds-really-make-crazy-2017042111534 |website=Harvard Health Blog |date=21 April 2017}}</ref>

A 2021 study found that the orofacial motor cortex which is a part of the brain area representing lip, jaw, and mouth movement (i.e. chewing action) has enhanced activation for typical trigger sounds much more than for aversive or neutral sounds in misophonia sufferers compared to age and sex matched healthy controls. They also found enhanced functional connectivity between orofacial motor cortex and secondary auditory cortex during sound perception for any sound. Further they reported resting state fMRI functional connectivity between orofacial motor cortex and secondary auditory & visual brain areas as well as secondary interoceptive cortex (left anterior insula). This suggests that misophonia, which is typically thought of as a disorder of sound emotion processing, is a result of manifestation of overactivation of the motor mirror neuron system that is involved in producing the movements associated with these trigger sounds or images. <ref>{{cite journal | vauthors = Kumar S, Dheerendra P, Erfanian M, Benzaquén E, Sedley W, Gander PE, Lad M, Bamiou DE, Griffiths TD | display-authors = 6 | title = The Motor Basis for Misophonia | journal = Journal of Neuroscience | date = May 2021 | doi = 10.1523/JNEUROSCI.0261-21.2021 }}</ref>


==Diagnosis==
==Diagnosis==

Revision as of 10:10, 23 May 2021

Misophonia
Other namesselective sound sensitivity syndrome,[1] select sound sensitivity syndrome, sound-rage[2][3]
SpecialtyPsychiatry

Misophonia is a disorder of decreased tolerance to specific sounds or their associated stimuli that has been characterized using different language and methodologies.[4] Reactions to trigger sounds range from anger and annoyance to activating a fight-or-flight response.[5] The condition is sometimes called selective sound sensitivity syndrome. Common triggers include oral sounds (e.g., loud breathing, chewing, swallowing), clicking sounds (e.g., keyboard tapping, finger tapping, windshield wipers), and sounds associated with movement (e.g., fidgeting).[5] Oftentimes, hated sounds are repetitive in nature.

Although the condition was first proposed in 2001 by Jastreboff and Jastreboff,[6] it has yet to be considered a diagnosable condition.[5] Misophonia is not classified as an auditory or psychiatric condition, and so is different from phonophobia (fear of sound); there are no standard diagnostic criteria, and there is little research on how common it is or the treatment.[5] Proponents suggest misophonia can adversely affect the ability to achieve life goals and to enjoy social situations. As of 2019 there were no evidence-based methods to manage the condition.

Signs and symptoms

As of 2016 the literature on misophonia was limited.[5] Some small studies show that people with misophonia generally have strong negative feelings, thoughts, and physical reactions to specific sounds, which the literature calls "trigger sounds". These sounds usually appear quiet to others, but can seem loud to the person with misophonia, as if they can't hear anything except the sound. One study found that around 80% of the sounds were related to the mouth (e.g., eating, slurping, chewing or popping gum, whispering, whistling) and around 60% were repetitive. A visual trigger may develop related to the trigger sound,[5][7] and a misophonic reaction can occur in the absence of an actual sound.[2]

Reactions to triggers can range from mild (anxiety, discomfort, and/or disgust) to severe (rage, anger, hatred, panic, fear, and/or emotional distress).[4] Reactions to the triggers can include aggression toward the origin of the sound, leaving, remaining in its presence but suffering, trying to block it or trying to mimic the sound.[7]

The first misophonic reaction may occur when a person is young, often between the ages of 9 and 13,[4] and can originate from someone in a close relationship, or a pet.[7]

People with misophonia are aware they experience it and some consider it abnormal; the disruption it causes in their lives ranges from mild to severe.[5][7] Avoidance and other behaviors can make it harder for people with this condition to achieve their goals and enjoy interpersonal interactions.[3]

Mechanism

Misophonia's mechanism is not known, but it appears that, like hyperacusis, it may be caused by a dysfunction of the central auditory system in the brain and not of the ears.[5][2] The perceived origin and context of the sound appears to be essential to trigger a reaction.[2]

A 2017 study [8] found that the anterior insular cortex (which plays a role both in emotions like anger and in integrating outside input, such as sound, with input from organs such as the heart and lungs) causes more activity in other parts of the brain in response to triggers, particularly in the parts responsible for long-term memories, fear, and other emotions. It also found that people with misophonia have higher amounts of myelin (a fatty substance that wraps around nerve cells in the brain to provide electrical insulation). It is not clear whether myelin is a cause or an effect of misophonia and its triggering of other brain areas.[9]

A 2021 study found that the orofacial motor cortex which is a part of the brain area representing lip, jaw, and mouth movement (i.e. chewing action) has enhanced activation for typical trigger sounds much more than for aversive or neutral sounds in misophonia sufferers compared to age and sex matched healthy controls. They also found enhanced functional connectivity between orofacial motor cortex and secondary auditory cortex during sound perception for any sound. Further they reported resting state fMRI functional connectivity between orofacial motor cortex and secondary auditory & visual brain areas as well as secondary interoceptive cortex (left anterior insula). This suggests that misophonia, which is typically thought of as a disorder of sound emotion processing, is a result of manifestation of overactivation of the motor mirror neuron system that is involved in producing the movements associated with these trigger sounds or images. [10]

Diagnosis

There are no standard diagnostic criteria,[5][7] and many doctors are unaware of this condition.[4] Misophonia is distinguished from hyperacusis, which is not specific to a given sound and does not involve a similar strong reaction, and from phonophobia, which is a fear of loud sounds,[7] but it may occur with either.[11]

It is not clear whether people with misophonia usually have comorbid conditions, nor whether there is a genetic component.[5][7] It appears that misophonia can occur on its own or along with other health, developmental and psychiatric problems.[4] When attempting to diagnose a patient with misophonia, doctors sometimes mistake its symptoms for an anxiety disorder, bipolar disorder or obsessive-compulsive disorder.[4]

Classification

The diagnosis of misophonia is not recognized in the DSM-IV or the ICD 10, and it is not classified as a hearing or psychiatric disorder.[7] It may be a form of sound–emotion synesthesia, and has parallels with some anxiety disorders.[5] As of 2018 it was not clear whether misophonia should be classified as a symptom or as a condition.[3]

Management

As of 2018 there are no evidence-based treatments[5] for the condition and no randomized clinical trial has been published; health care providers generally try to help people cope with misophonia by recognizing what the person is experiencing and working on coping strategies.[7] Some small studies have been published on the use of sound therapy similar to tinnitus retraining therapy and on cognitive behavioral therapy and particularly exposure therapy, to help people become less aware of the trigger sound.[3] None of these approaches has been sufficiently studied to determine its effectiveness.[3][12]

Epidemiology

Misophonia's prevalence is not known; nor is it known whether sex, gender, or age affect the likelihood of having misophonia.[5][2][7]

The existence of several online support groups with thousands of members has been cited as possibly indicative of its prevalence.[13]

Etymology

"Misophonia" comes from the Greek words μίσος (IPA: /'misɔs/), meaning "hate", and φωνή (IPA: /fɔˈni/), meaning "voice", loosely translating to "hate of sound", and was coined by audiologists Pawel and Margaret Jastreboff in 2000 to differentiate the condition from other forms of decreased sound tolerance such as hyperacusis (hypersensitivity to certain frequencies and volume ranges) and phonophobia (fear of sounds).[3][12][6]

Comparisons and associations with other phenomena

Some people have sought to relate misophonia to ASMR (autonomous sensory meridian response, or auto-sensory meridian response), a pleasant form of paresthesia, a tingling sensation that typically begins on the scalp and moves down the back of the neck and upper spine. ASMR is described as the opposite of what can be observed in reactions to specific audio stimuli in misophonia.[14] There are plentiful anecdotal reports of people who claim to have both misophonia and ASMR. Common to these reports is the experience of ASMR in response to some sounds and misophonia in response to others.[14][15][16]

Society and culture

People who experience misophonia have formed online support groups.[17][13]

In 2016, Quiet Please, a documentary about misophonia, was released.[18][19]

In 2020, a team of misophonia researchers[20] received the Ig Nobel Prize in Medicine "for diagnosing a long-unrecognized medical condition: Misophonia, the distress at hearing other people make chewing sounds".[21]

Notable cases

See also

External links

References

  1. ^ Sanchez TG, Silva FE (2017). "Familial misophonia or selective sound sensitivity syndrome : evidence for autosomal dominant inheritance?". Brazilian Journal of Otorhinolaryngology. 84 (5): 553–559. doi:10.1016/j.bjorl.2017.06.014. PMID 28823694.
  2. ^ a b c d e Bruxner G (April 2016). "'Mastication rage': a review of misophonia - an under-recognised symptom of psychiatric relevance?". Australasian Psychiatry. 24 (2): 195–7. doi:10.1177/1039856215613010. PMID 26508801. S2CID 7106232.
  3. ^ a b c d e f Cavanna AE, Seri S (August 2015). "Misophonia: current perspectives". Neuropsychiatric Disease and Treatment. 11: 2117–23. doi:10.2147/NDT.S81438. PMC 4547634. PMID 26316758.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  4. ^ a b c d e f Swedo S, Baguley DM, Denys D, Dixon LJ, Erfanian M, Fioretti A, Jastreboff PJ, Kumar S, Rosenthal MZ, Rouw R, Schiller D (2021). "A Consensus Definition of Misophonia: Using a Delphi Process to Reach Expert Agreement". medrxiv.org. doi:10.1101/2021.04.05.21254951. S2CID 233152520. Retrieved 11 April 2021.
  5. ^ a b c d e f g h i j k l m Brout JJ, Edelstein M, Erfanian M, Mannino M, Miller LJ, Rouw R, et al. (2018). "Investigating Misophonia: A Review of the Empirical Literature, Clinical Implications, and a Research Agenda". Frontiers in Neuroscience. 12: 36. doi:10.3389/fnins.2018.00036. PMC 5808324. PMID 29467604.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  6. ^ a b Jastreboff MM, Jastreboff PJ (2001). "Components of decreased sound tolerance : hyperacusis, misophonia, phonophobia" (PDF).
  7. ^ a b c d e f g h i j Duddy DF, Oeding KA (2014). "Misophonia: An Overview". Semin Hear. 35 (2): 084–091. doi:10.1055/s-0034-1372525.
  8. ^ Kumar S, Tansley-Hancock O, Sedley W, Winston JS, Callaghan MF, Allen M, et al. (February 2017). "The Brain Basis for Misophonia". Current Biology. 27 (4): 527–533. doi:10.1016/j.cub.2016.12.048. PMC 5321671. PMID 28162895.
  9. ^ Cartreine J (21 April 2017). "Misophonia: When sounds really do make you "crazy"". Harvard Health Blog.
  10. ^ Kumar S, Dheerendra P, Erfanian M, Benzaquén E, Sedley W, Gander PE, et al. (May 2021). "The Motor Basis for Misophonia". Journal of Neuroscience. doi:10.1523/JNEUROSCI.0261-21.2021.
  11. ^ Jastreboff PJ, Jastreboff MM (2015). Decreased sound tolerance: hyperacusis, misophonia, diplacousis, and polyacousis. Handbook of Clinical Neurology. Vol. 129. pp. 375–87. doi:10.1016/B978-0-444-62630-1.00021-4. ISBN 9780444626301. PMID 25726280. {{cite book}}: |journal= ignored (help)
  12. ^ a b Cavanna AE (April 2014). "What is misophonia and how can we treat it?". Expert Review of Neurotherapeutics. 14 (4): 357–9. doi:10.1586/14737175.2014.892418. PMID 24552574. S2CID 36026220.
  13. ^ a b Schröder A, Vulink N, Denys D (23 January 2013). "Misophonia: diagnostic criteria for a new psychiatric disorder". PLOS ONE. 8 (1): e54706. Bibcode:2013PLoSO...854706S. doi:10.1371/journal.pone.0054706. PMC 3553052. PMID 23372758.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  14. ^ a b Rouw R, Erfanian M (March 2018). "A Large-Scale Study of Misophonia". Journal of Clinical Psychology. 74 (3): 453–479. doi:10.1002/jclp.22500. PMID 28561277.
  15. ^ "ASMR and Misophonia: Sounds-Crazy!". Science in our world: certainty and controversy. Pennsylvania State University. 16 September 2015.
  16. ^ Higa K (11 June 2015). "Technicalities of the Tingles: The science of sounds that feel good. #ASMR". Neuwrite. Retrieved 20 January 2016.
  17. ^ Cohen J (5 September 2011). "When a Chomp or a Slurp is a Trigger for Outrage". The New York Times. Retrieved 5 February 2012.
  18. ^ Jeffries A (17 June 2016). "There's a New Film About Misophonia, Where People Get Enraged by Certain Sounds". Motherboard. Retrieved 18 September 2020.
  19. ^ Garcy PD (27 January 2016). "What Jeffrey S. Gould Can Teach Us about Misophonia". Psychology Today.
  20. ^ Schröder A, Vulink N, Denys D (2013) "Misophonia: Diagnostic Criteria for a New Psychiatric Disorder". PLOS ONE 8(1): e54706. https://doi.org/10.1371/journal.pone.0054706
  21. ^ 2020 Ig Nobel Prizes
  22. ^ Lerner BH (2 March 2015). "Please Stop Making That Noise". Well. New York Times. Retrieved 18 October 2016.
  23. ^ Misophonia: Kelly Ripa Has Rare Disorder. 20/20. ABC News. 18 May 2012. Retrieved 18 October 2016.
  24. ^ Bisley A (10 March 2015). "Melanie Lynskey on Togetherness, realism and 'radical' nudity". The Guardian. ISSN 0261-3077. Retrieved 30 June 2017.
  25. ^ "Kelly Osbourne Has Misophonia". www.mirror.co.uk.
  26. ^ "Pat McAFLEET on Twitter: "I have this thing called Misophonia where I can't listen to people chew. It's a real thing, I have to leave the room #PatMcAfeeShowLIVE"". twitter.com. 19 November 2020. Retrieved 20 November 2020.
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