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Fibromyalgia
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=== Brain and spinal cord research === A 2004 study by Heffez et al. studied 270 patients with FM and found that 46% had [[cervical spinal stenosis]] and 20% [[chiari malformation]].<ref name="Heffez2004">{{Cite journal | last = Heffez | first = Dan S. | last2 = Ross | first2 = Ruth E. | last3 = Shade-Zeldow | first3 = Yvonne | last4 = Kostas | first4 = Konstantinos | last5 = Shah | first5 = Sagar | last6 = Gottschalk | first6 = Robert | last7 = Elias | first7 = Dean A. | last8 = Shepard | first8 = Alan | last9 = Leurgans | first9 = Sue E. | date = 2004-04-09 | title = Clinical evidence for cervical myelopathy due to Chiari malformation and spinal stenosis in a non-randomized group of patients with the diagnosis of fibromyalgia| url = https://link.springer.com/article/10.1007/s00586-004-0672-x|journal=European Spine Journal|language=en|volume=13|issue=6 | pages = 516–523|doi=10.1007/s00586-004-0672-x|issn=0940-6719|pmc=|pmid=15083352|via=}}</ref> In 2007, Heffez et al. saw significant improvement in physical and mental well-being was found in patients with cervical stenosis who received surgery.<ref name="Heffez2007">{{Cite journal | last = Heffez | first = Dan S. | last2 = Ross | first2 = Ruth E. | last3 = Shade-Zeldow | first3 = Yvonne | last4 = Kostas | first4 = Konstantinos | last5 = Morrissey | first5 = Mary | last6 = Elias | first6 = Dean A. | last7 = Shepard | first7 = Alan | date = 2007 | title=Treatment of cervical myelopathy in patients with the fibromyalgia syndrome: outcomes and implications |url =https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2200733/|journal=European Spine Journal|volume=16|issue=9 | pages = 1423–1433|doi=10.1007/s00586-007-0366-2|issn=0940-6719|pmc=2200733|pmid=17426987|quote=|via=}}</ref> A second study in 2007 by Andrew Holman found that 71% had cervical [[spinal cord]] compression.<ref name="Holman2008">{{Cite journal | date = 2008-07-01 | title = Positional Cervical Spinal Cord Compression and Fibromyalgia: A Novel Comorbidity With Important Diagnostic and Treatment Implications |url =https://www.sciencedirect.com/science/article/pii/S1526590008004379|journal=The Journal of Pain|language=en|volume=9|issue=7 | pages = 613–622|doi=10.1016/j.jpain.2008.01.339|issn=1526-5900 | last = Holman | first = Andrew|quote=|via=|pmc=|pmid=}}</ref> In the past many patients were misdiagnosed with FM when further testing would have revealed the correct diagnosis for the cause of their pain; the 2010 (updated in 2016) ACR criteria has helped curb misdiagnoses.<ref name="misdiagnosis">{{Cite news | title = Common Misdiagnoses of Fibromyalgia| url = https://www.webmd.com/fibromyalgia/guide/common-misdiagnoses-of-fibromyalgia#|work=WebMD|access-date=2018-11-26|language=en-US | last = | first = | date = |archive-url=|archive-date=}}</ref><ref name="Wolfe2018" /> Various types of brain imaging are being used to research FM. {{See also|Fibromyalgia notable studies}} In 2002, an [[Functional magnetic resonance imaging|fMRI]] study conducted by Richard Gracely and Daniel Claw found people with FM "have measurable pain signals in their brains, from a gentle finger squeeze that barely feels unpleasant to people without the disease."<ref name="anapsid2002">{{Cite web | url = http://www.anapsid.org/cnd/diagnosis/brainpain.html | title = Fibromyalgia Pain Isn't All In Patient's Heads, New Brain Study Finds|website= Melissa Kaplan's Chronic Neuroimmune Diseases| date = 2014 |access-date=2021-11-28}}</ref> A 2007 study by Borsook et al. found decreased gray matter density relative to controls in cingulate cortex (CC), medial prefrontal cortex (Med. PFC), parahippocampal gyrus (PHG) and insula.<ref name="Borsook2007">{{Cite journal | last = Borsook | first = David | last2 = Moulton | first2 = Eric A | last3 = Schmidt | first3 = Karl F | last4 = Becerra | first4 = Lino R | date = 2007-09-11 | title = Neuroimaging Revolutionizes Therapeutic Approaches to Chronic Pain | url =https://link.springer.com/article/10.1186/1744-8069-3-25|journal=Molecular Pain|language=en|volume=3|issue=1 | pages = 1744–8069-3-25|doi=10.1186/1744-8069-3-25|issn=1744-8069|pmid=17848191|via=}}</ref> In 2015, Loggia et al. imaged [[neuroinflammation]] due to [[Glial cell|glial]] activation using MR/PET imaging.<ref name="Loggia2015">{{Cite journal | last = Loggia | first = Marco L. | last2 = Chonde | first2 = Daniel B. | last3 = Akeju | first3 = Oluwaseun | last4 = Arabasz | first4 = Grae | last5 = Catana | first5 = Ciprian | last6 = Edwards | first6 = Robert R. | last7 = Hill | first7 = Elena | last8 = Hsu | first8 = Shirley | last9 = Izquierdo-Garcia | first9 = David | date = 2015-01-08 | title = Evidence for brain glial activation in chronic pain patients |url =https://academic.oup.com/brain/article/138/3/604/333527?searchresult=1|journal=Brain|language=en|volume=138|issue=3 | pages = 604–615|doi=10.1093/brain/awu377|issn=1460-2156}}</ref> In 2017, López-Solà et al. identified three [[brain]] patterns based on [[Functional magnetic resonance imaging|fMRI]] responses to pressure pain and non-painful multisensory stimulation. "These patterns, taken together, discriminate FM from matched healthy controls with 92% sensitivity and 94% specificity."<ref name="Lopez2017">{{Cite journal | last = López-Solà | first = Marina | last2 = Woo | first2 = Choong-Wan | last3 = Pujol | first3 = Jesus | last4 = Deus | first4 = Joan | last5 = Harrison | first5 = Ben J. | last6 = Monfort | first6 = Jordi | last7 = Wager | first7 = Tor D. | date = 2017 | title=Towards a neurophysiological signature for fibromyalgia| url = https://www.ncbi.nlm.nih.gov/pubmed/27583567|journal=Pain|volume=158|issue=1 | pages = 34–47|doi=10.1097/j.pain.0000000000000707|issn=1872-6623|pmid=27583567|via=}}</ref> In 2018, Albrecht et al used [[Positron emission tomography|PET]] scans to document [[Glial cell|glial]] activation.<ref name="Albrecht2018">{{Cite journal | last = Albrecht | first = Daniel S. | last2 = Forsberg | first2 = Anton | last3 = Sandstrom | first3 = Angelica | last4 = Bergan | first4 = Courtney | last5 = Kadetoff | first5 = Diana | last6 = Protsenko | first6 = Ekaterina | last7 = Lampa | first7 = Jon | last8 = Lee | first8 = Yvonne C. | last9 = Höglundi | first9 = Caroline Olgart | date = 2018-09-14|others=Catana, Ciprian; Cervenka, Simon; Akeju, Oluwaseun; Lekander, Mats; Cohen, George; Halldin, Christer; Taylor, Norman; Kim, Minhae; Hooker, Jacob M.; Loggia, Marco L. | title = Brain glial activation in fibromyalgia – A multi-site positron emission tomography investigation | url =https://www.sciencedirect.com/science/article/pii/S0889159118302423|journal=Brain, Behavior, and Immunity|language=en|volume= | pages = |doi=10.1016/j.bbi.2018.09.018|issn=0889-1591|via=}}</ref> Also in 2018, Martucci et al. found unbalanced activity between the ventral and dorsal cervical spinal cord. Ventral neural processes were increased and dorsal neural processes were decreased which may reflect the presence of [[central sensitization]] contributing to [[fatigue]] and other bodily symptoms in FM.<ref name="Martucci2018">{{Cite journal | last = Martucci | first = Katherine T | last2 = Weber | first2 = Kenneth A | last3 = Mackey | first3 = Sean C | date = 2018-10-03 | title = Altered Cervical Spinal Cord Resting State Activity in Fibromyalgia| url = https://onlinelibrary.wiley.com/doi/abs/10.1002/art.40746|journal=Arthritis & Rheumatology|language=en|doi=10.1002/art.40746|issn=2326-5191}}</ref>
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