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https://www.readbyqxmd.com/read/27913924/shear-wave-elastography-reveals-different-degrees-of-passive-and-active-stiffness-of-the-neck-extensor-muscles
#1
Angela V Dieterich, Ricardo J Andrade, Guillaume Le Sant, Deborah Falla, Frank Petzke, François Hug, Antoine Nordez
PURPOSE: The neck extensor muscles contribute to spinal support and posture while performing head and neck motion. Muscle stiffness relates to passive elasticity (support) and active tensioning (posture and movement) of muscle. It was hypothesized that support and motion requirements are reflected in the distribution of stiffness between superficial and deep neck extensor muscles. METHODS: In ten healthy participants, shear modulus (stiffness) of five neck extensor muscles was determined in prone at rest and during isometric head lift at three intensities using shear wave elastography...
December 2, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27879506/fatty-degeneration-of-the-paraspinal-muscle-in-patients-with-degenerative-lumbar-kyphosis-a-new-evaluation-method-of-quantitative-digital-analysis-using-mri-and-ct-scan
#2
Seung-Jae Hyun, Chae-Wan Bae, Sang-Hoon Lee, Seung-Chul Rhim
STUDY DESIGN: A comparative case-control study. OBJECTIVE: The aim of this study was to quantify the degree of paraspinal muscle changes in degenerative lumbar kyphosis (DLK) patients using magnetic resonance imaging and computed tomography scanning. SUMMARY OF BACKGROUND DATA: Although the pathophysiology of DLK is not completely understood, extensive degeneration and weakness of the lumbar extensor muscles are thought to underlie the condition in most patients...
December 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27872641/muscle-functions-and-functional-performance-among-older-persons-with-and-without-low-back-pain
#3
Nor Azizah Ishak, Zarina Zahari, Maria Justine
This study aims to compare muscle functions and functional performances between older persons with and without low back pain (LBP) and to determine the association between muscle functions and functional performances. This is a cross-sectional study, involving 95 older persons (age = 70.27 ± 7.26 years). Anthropometric characteristics, muscle functions, and functional performances were measured. Data were analyzed using ANOVA, Pearson's correlation, and multiple linear regression. The functional performances showed no significant differences (females LBP versus non-LBP, males LBP versus non-LBP) (p < 0...
2016: Current Gerontology and Geriatrics Research
https://www.readbyqxmd.com/read/27870804/the-effects-of-low-load-motor-control-exercises-and-a-high-load-lifting-exercise-on-lumbar-multifidus-thickness-a-randomized-controlled-trial
#4
Lars Berglund, Björn Aasa, Peter Michaelson, Ulrika Aasa
STUDY DESIGN: Randomized controlled trial OBJECTIVE.: The aim of this study was to compare the effects of low-load motor control exercises and a high-load lifting exercise, on lumbar multifidus (LM) thickness on either side of the spine and whether the effects are affected by pain intensity or change in pain intensity, among patients with nociceptive mechanical LBP. SUMMARY OF BACKGROUND DATA: There is evidence that patients with low back pain may have a decreased size of the (LM) muscles with an asymmetry between sides in the lower back...
November 18, 2016: Spine
https://www.readbyqxmd.com/read/27861847/structural-and-functional-characteristics-of-the-thoracolumbar-multifidus-muscle-in-horses
#5
J A García Liñeiro, G H Graziotti, J M Rodríguez Menéndez, C M Ríos, N O Affricano, C L Victorica
The multifidus muscle fascicles of horses attach to vertebral spinous processes after crossing between one to six metameres. The fascicles within one or two metameres are difficult to distinguish in horses. A vertebral motion segment is anatomically formed by two adjacent vertebrae and the interposed soft tissue structures, and excessive mobility of a vertebral motion segment frequently causes osteoarthropathies in sport horses. The importance of the equine multifidus muscle as a vertebral motion segment stabilizer has been demonstrated; however, there is scant documentation of the structure and function of this muscle...
November 11, 2016: Journal of Anatomy
https://www.readbyqxmd.com/read/27858677/intra-and-interreliability-of-histographic-analysis-for-paraspinal-muscle-degeneration-in-patients-with-unilateral-back-pain-using-magnetic-resonance-imaging
#6
Dong-Won Suh, Yushin Kim, Minyoung Lee, Seungcheol Lee, Sung Jun Park, BumChul Yoon
BACKGROUND: Mixed use of T1- or T2-weighted magnetic resonance imaging (MRI) in histographic analysis has impeded cross-reference of studies on fatty degeneration of muscles in patients with back pain. OBJECTIVE: The current study aimed to establish the measurement reliability of histographic analysis for normal and painful paraspinal muscles between T1- and T2-weighted MRI. METHODS: T1- and T2-weighted MRI at the L4-5 level were performed in 31 patients with unilateral back pain...
November 11, 2016: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/27847987/the-side-of-chronic-low-back-pain-matters-evidence-from-the-primary-motor-cortex-excitability-and-the-postural-adjustments-of-multifidi-muscles
#7
Hugo Massé-Alarie, Louis-David Beaulieu, Richard Preuss, Cyril Schneider
Hemispheric lateralization of pain processing was reported with overactivation of the right frontal lobe. Specifically in chronic low back pain (CLBP), functional changes in the left primary motor cortex (M1) with impaired anticipatory postural activation (APA) of trunk muscles have been observed. Given the connections between frontal and M1 areas for motor planning, it is hypothesized that the pain side could differently influence M1 function and APA of paravertebral multifidus (MF) muscles. This study aimed at testing whether people with right- versus left-sided CLBP showed different M1 excitability and APA...
November 15, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27836771/differential-activation-of-the-dorsal-neck-muscles-during-a-light-arm-elevation-task-in-patients-with-chronic-nonspecific-neck-pain-and-asymptomatic-controls-an-ultrasonographic-study
#8
Raziyeh Baghi, Leila Rahnama, Noureddin Karimi, Fereshte Goodarzi, Asghar Rezasoltani, Shapour Jaberzadeh
BACKGROUND: Disturbance in neck muscle function is a well-known complication of chronic nonspecific neck pain (CNNP). It is, however, unclear which muscles are more susceptible to functional impairment in patients with CNNP during upper limb tasks. OBJECTIVES: To compare ultrasonographic changes in dorsal neck muscles thickness in patients with CNNP and asymptomatic controls while they performed a light load upper-limb movement. DESIGN: Case control...
November 9, 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/27826404/the-activation-pattern-of-trunk-and-lower-limb-muscles-in-an-electromyographic-assessment-comparison-between-ground-and-treadmill-walking
#9
Reza Mazaheri, Mohammad Ali Sanjari, Gelareh Radmehr, Farzin Halabchi, Hooman Angoorani
BACKGROUND: Due to biomechanical differences, various patterns of muscle contraction are expected to occur while walking over ground versus when walking on a treadmill. OBJECTIVES: This study aimed to compare amplitude and duration of activation of selected trunk and lower extremity muscles during over-ground and treadmill walking. MATERIALS AND METHODS: Through a simple sampling method, 19 sedentary healthy men within the age range of 20 - 40 were selected...
September 2016: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/27821968/comparison-of-electromyographic-activities-of-lumbar-iliocostalis-and-lumbar-multifidus-muscles-during-stabilization-exercises-in-prone-quadruped-and-sitting-positions
#10
Marie Kelly, Dee Jacobs, Mary E Wooten, Ayse Ozcan Edeer
[Purpose] The purposes of this study were: 1) describe a hierarchy of electromyographic activity production, using percentage maximum voluntary contraction of lumbar iliocostalis and lumbar multifidus muscles during prone, quadruped and sitting exercises; and 2) identify optimal recruitment exercises for both lumbar iliocostalis as a global multi-segmental stabilizer and lumbar multifidus as a segmental stabilizer. [Subjects] Twelve healthy volunteers (six male and six female) aged 24 to 45 participated. [Methods] Surface electromyographic activity data were collected bilaterally from lumbar iliocostalis and lumbar multifidus muscles during exercises...
October 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27811712/molecular-phylogeny-morphology-and-taxonomy-of-moroccan-triops-granarius-lucas-1864-crustacea-notostraca-with-the-description-of-two-new-species
#11
Michael Korn, Anna K Hundsdoerfer
We used three molecular markers to investigate populations of Triops granarius from a study area in western Morocco that had a north-south span of approx. 434 km, the most distant populations situated at more than 470 km distance from each other. Previous studies had already investigated two Triops granarius populations from this region and revealed their affiliation to the major phylogenetic lineage that includes Triops cancriformis. By contrast, based on the geographic position of the type locality and the morphology of the type, Triops granarius s...
October 25, 2016: Zootaxa
https://www.readbyqxmd.com/read/27790316/the-variation-in-the-lumbar-facet-joint-orientation-in-an-adult-asian-population-and-its-relationship-with-the-cross-sectional-area-of-the-multifidus-and-erector-spinae
#12
Kazuhiro Sugawara, Masaki Katayose, Kota Watanabe
STUDY DESIGN: Cross-sectional study of healthy volunteers. PURPOSE: We aimed to investigate the variation in the lumbar facet joint orientation in an adult Asian population. The relationship between the facet joint orientation and muscle cross-sectional area (CSA) of multifidus and erector spinae was also clarified. OVERVIEW OF LITERATURE: Several studies have reported that lumbar pathologies, such as lumbar spondylolysis and degenerative spondylolisthesis, were related to the horizontally shaped lumbar facet joint orientation at the lower lumbar level...
October 2016: Asian Spine Journal
https://www.readbyqxmd.com/read/27785930/evaluation-of-paravertebral-muscle-atrophy-and-fatty-degeneration-in-ankylosing-spondylitis
#13
Hatice Resorlu, Yılmaz Savas, Nilufer Aylanc, Ferhat Gokmen
AIM: The purpose of this study was to assess morphological changes in the paravertebral muscles in patients with ankylosing spondylitis. MATERIALS AND METHODS: Fifty-one patients diagnosed with ankylosing spondylitis and a 50 member control group were included in the study. The surface area of the multifidus and erector spinae muscles was measured at four levels between L1 and L5, and fatty degeneration in these muscles was scored. Lumbosacral and lumbar lordotic angles were determined for the patient and control groups...
October 27, 2016: Modern Rheumatology
https://www.readbyqxmd.com/read/27785474/idiopathic-and-normal-lateral-lumbar-curves-muscle-effects-interpreted-by-12th-rib-length-asymmetry-with-pathomechanic-implications-for-lumbar-idiopathic-scoliosis
#14
Theodoros B Grivas, R Geoffrey Burwell, Vasileios Kechagias, Christina Mazioti, Apostolos Fountas, Dimitra Kolovou, Evangelos Christodoulou
BACKGROUND: The historical view of scoliosis as a primary rotation deformity led to debate about the pathomechanic role of paravertebral muscles; particularly multifidus, thought by some to be scoliogenic, counteracting, uncertain, or unimportant. Here, we address lateral lumbar curves (LLC) and suggest a pathomechanic role for quadrates lumborum, (QL) in the light of a new finding, namely of 12th rib bilateral length asymmetry associated with idiopathic and small non-scoliosis LLC. METHODS: Group 1: The postero-anterior spinal radiographs of 14 children (girls 9, boys 5) aged 9-18, median age 13 years, with right lumbar idiopathic scoliosis (IS) and right LLC less that 10°, were studied...
2016: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/27724897/paraspinal-muscles-density-a-marker-for-degenerative-lumbar-spinal-stenosis
#15
Janan Abbas, Viviane Slon, Hila May, Nathan Peled, Israel Hershkovitz, Kamal Hamoud
BACKGROUND: The condition of paraspinal muscles is known to be associated with some variables such as age, gender, and low back pain. It is generally agreed that these muscles play an important role in the stability and functional movements of the lumbar vertebral column. Although spinal instability has been shown to play an essential role in degenerative lumbar spinal stenosis (DLSS), the role of paraspinal muscles remains elusive. The main purpose of this study was to shed light on the relationship between the condition of paraspinal muscles and symptomatic DLSS...
October 10, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27721002/lumbar-muscle-cross-sectional-areas-do-not-predict-clinical-outcomes-in-adults-with-spinal-stenosis-a-longitudinal-study
#16
Alfred C Gellhorn, Pradeep Suri, Sean Rundell, Nathan Olafsen, M Jake Carlson, Steve Johnson, Adrielle Fry, Thiru Anaswammy, Christopher Gilligan, Bryan Comstock, Patrick Heagerty, Janna Friedly, Jeffrey G Jarvik
BACKGROUND: Minimal longitudinal data exist regarding the role of lumbar musculature in predicting back pain and function. In cross sectional study designs, there is often atrophy of the segmental multifidus muscle in subjects with low back pain compared with matched controls. However, the cross sectional design of these studies prevents drawing conclusions regarding whether lumbar muscle characteristics predict or modify future back pain or function. OBJECTIVE: The primary objective is to determine if the cross sectional area (CSA) of lumbar muscles predicts functional status or back pain at 6- or 12-month follow-up in older adults with spinal degeneration...
October 6, 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/27685010/exercise-and-transversus-abdominis-muscle-atrophy-after-60-d-bed-rest
#17
Daniel L Belavý, Ulf Gast, Dieter Felsenberg
PURPOSE: To investigate atrophy in the deep abdominal muscles, spinal extensors and the impact of high-load resistive exercise with and without whole body vibration following 60d of strict bed-rest. METHODS: 24 subjects underwent 60-days of head-down tilt bed-rest and performed either resistive vibration exercise (RVE), resistive exercise only (RE) or no exercise control (2nd Berlin BedRest Study). The thickness of the transversus abdominis, internal oblique and erector spinae muscles and area of the multifidus muscle were measured bilaterally via real-time ultrasound...
September 28, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27683975/multifidus-muscle-atrophy-not-observed-following-two-segment-anterior-inter-body-fusion-a-rabbit-model-study-with-a-12-month-follow-up
#18
Wen-Bin Xu, Jun-Hui Liu, Zhi-Jun Chen, Xiang-Qian Fang, Shun-Wu Fan, Zhi-Jun Hu
STUDY DESIGN: Experimental study evaluated magnetic resonance imaging (MRI) and histologic changes in the multifidus muscle after anterior spinal fusion. OBJECTIVE: To determine the effect of spinal fusion on the multifidus muscle in an anterior rabbit model through the use of MRI and histologic evaluation. SUMMARY OF BACKGROUND DATA: Retraction and splitting approach are known to be important factors in postoperative injury and atrophy of the multifidus muscle...
September 28, 2016: Spine
https://www.readbyqxmd.com/read/27676689/structural-changes-of-lumbar-muscles-in-non-specific-low-back-pain-a-systematic-review
#19
Dorien Goubert, Jessica Van Oosterwijck, Mira Meeus, Lieven Danneels
BACKGROUND: Lumbar muscle dysfunction due to pain might be related to altered lumbar muscle structure. Macroscopically, muscle degeneration in low back pain (LBP) is characterized by a decrease in cross-sectional area and an increase in fat infiltration in the lumbar paraspinal muscles. In addition microscopic changes, such as changes in fiber distribution, might occur. Inconsistencies in results from different studies make it difficult to draw firm conclusions on which structural changes are present in the different types of non-specific LBP...
September 2016: Pain Physician
https://www.readbyqxmd.com/read/27673378/minimal-incision-multifidus-sparing-microendoscopic-diskectomy-versus-conventional-microdiskectomy-for-highly-migrated-intracanal-lumbar-disk-herniations
#20
Mohamed Hussein
BACKGROUND: Highly migrated intracanal disk herniation is not among the exclusion criteria of the interlaminar microendoscopic diskectomy (MED) procedure. The goal of this prospective, randomized, controlled study was to compare the effect of the size of the skin incision and the method of handling the multifidus muscle on the results of the interlaminar MED procedure versus conventional microdiskectomy in retrieving highly migrated intracanal disk herniations. METHODS: Seventy-three patients with highly migrated intracanal lumbar disk herniations treated with either minimal incision, multifidus-sparing MED or conventional microdiskectomy were observed for 2 years...
November 2016: Journal of the American Academy of Orthopaedic Surgeons
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