Muscle functional magnetic resonance imaging and acute low back pain: a pilot study to characterize lumbar muscle activity asymmetries and examine the effects of osteopathic manipulative treatment.
BACKGROUND: Muscle functional magnetic resonance imaging (mfMRI) measures transverse relaxation time (T2), and allows for determination of the spatial pattern of muscle activation. The purposes of this pilot study were to examine whether MRI-derived T2 or side-to-side differences in T2 (asymmetries)...
| Publicado en: | Osteopathic Medicine & Primary Care Vol. 3; pp. 10p - 11 |
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| Autores principales: | , , , , |
| Formato: | diagnostic images research tables/charts Journal Article |
| Publicado: |
BioMed Central
2009
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105270050&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105270050 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 17504732 6BXA jtl: Osteopathic Medicine & Primary Care issn: 17504732 maglogo: N pubinfo: dt: 2009 vid: 3 pid: 24147 pub: BioMed Central artinfo: ui: 105270050 2010496518 10.1186/1750-4732-3-7 NLM19712459 105270050 ppf: 10p ppct: 1 formats: fmt: @attributes: type: P tig: atl: Muscle functional magnetic resonance imaging and acute low back pain: a pilot study to characterize lumbar muscle activity asymmetries and examine the effects of osteopathic manipulative treatment. aug: au: Clark BC Walkowski S Conatser RR Eland DC Howell JN affil: Institute for Neuromusculoskeletal Research, Ohio University College of Osteopathic Medicine, Northfield, OH, USA; clarkb2@ohio.edu. sug: subj: Low Back Pain Prevention and Control Manipulation, Osteopathic Muscle, Skeletal Radiography Adult Aged Body Weights and Measures Clinical Assessment Tools Data Analysis Software Descriptive Statistics Erector Spinae Muscles Female Funding Source Magnetic Resonance Imaging Male Middle Age Multifidus Muscles One-Way Analysis of Variance Pearson's Correlation Coefficient Physical Examination Pilot Studies Post Hoc Analysis Psoas Muscles Repeated Measures Software Time Factors Visual Analog Scaling Adult: 19-44 years Aged: 65+ years Middle Aged: 45-64 years Female Male ab: BACKGROUND: Muscle functional magnetic resonance imaging (mfMRI) measures transverse relaxation time (T2), and allows for determination of the spatial pattern of muscle activation. The purposes of this pilot study were to examine whether MRI-derived T2 or side-to-side differences in T2 (asymmetries) differ in low back muscles between subjects with acute low back pain (LBP) compared to asymptomatic controls, and to determine if a single osteopathic manipulative treatment (OMT) session alters these T2 properties immediately and 48-hours after treatment. METHODS: Subjects with non-specific acute LBP (mean score on 110 visual analog score = 3.02 +/- 2.81) and asymptomatic controls (n = 9/group) underwent an MRI, and subsequently the LBP subjects received OMT and then underwent another MRI. The LBP subjects reported back for an additional MRI 48-hours following their initial visit. T2 and T2 asymmetry were calculated from regions of interest for the psoas, quadratus lumborum (QL), multifidus, and iliocostalis lumborum/longissimus thoracis (IL/LT) muscles. RESULTS: No differences were observed between the groups when T2 was averaged for the left and right side muscles. However, the QL displayed a significantly greater T2 asymmetry in LBP subjects when compared to controls (29.1 +/- 4.3 vs. 15.9 +/- 4.1%; p = 0.05). The psoas muscle also displayed a relatively large, albeit non-significant, mean difference (22.7 +/- 6.9 vs. 9.5 +/- 2.8%; p = 0.11). In the subjects with LBP, psoas T2 asymmetry was significantly reduced immediately following OMT (25.3 +/- 6.9 to 6.1 +/- 1.8%, p = 0.05), and the change in LBP immediately following OMT was correlated with the change in psoas T2 asymmetry (r = 0.75, p = 0.02). CONCLUSION: Collectively, this pilot work demonstrates the feasibility of mfMRI for quantification and localization of muscle abnormalities in patients with acute low back pain. Additionally, this pilot work provides insight into the mechanistic actions of OMT during acute LBP, as it suggests that it may attenuate muscle activity asymmetries of some of the intrinsic low back muscles. pubtype: Academic Journal doctype: diagnostic images research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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