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Elise Vleeming, Sergiy Lazarenko, Friso van der Zant, Xiao-Bo Pan, Jerome Declerck, Maurits Wondergem, Remco Knol
PURPOSE: In this study, differences are investigated in cardiac displacement during adenosine stress versus regadenoson stress in13 N-Ammonia(13 NH3 ) MP PET/CT scans. METHODS: A total of 61 MP PET/CTs were acquired using either adenosine (n=30) or regadenoson (n=31) as a stressor. For both groups, cardiac displacement during rest and stress was measured three-dimensionally, relative to either a fixed reference frame or the previous frame, in each 1-minute frame of a list-mode PET acquisition of 25 minutes...
December 22, 2017: Journal of Nuclear Medicine Technology
Mieke Dolphens, Andry Vleeming, René Castelein, Guy Vanderstraeten, Tom Schlösser, Frank Plasschaert, Lieven Danneels
PURPOSE: To investigate coronal plane trunk asymmetry (TA) and its association with sagittal postural alignment in healthy subjects before pubertal peak growth. METHODS: In this cross-sectional baseline study, 1190 healthy pre-peak growth velocity subjects were included. Coronal plane TA was evaluated using back surface topography. Whole-body sagittal alignment (previously validated and objectively classified as neutral, sway-back or leaning-forward) and sagittal spinopelvic profile (trunk lean, lumbar lordosis, thoracic kyphosis, sacral inclination and length of the posteriorly inclined thoracolumbar segment) were determined, as were height, proportion of trunk to body length, body mass index, generalized joint laxity, and handedness...
February 2018: European Spine Journal
Jessica Van Oosterwijck, Eline De Ridder, Andry Vleeming, Guy Vanderstraeten, Stijn Schouppe, Lieven Danneels
OBJECTIVE: Examine whether implementing an active lumbopelvic control strategy during high load prone lumbar extension exercises affects posterior extensor chain recruitment and lumbopelvic kinematics. METHODS: Thirteen healthy adults acquired an optimal active lumbopelvic control strategy during guided/home-based training sessions. During the experimental session electromyography was used to evaluate the activity of the posterior extensor chain muscles during high load trunk/bilateral leg extension exercises with/without application of the strategy...
August 2017: Human Movement Science
Mieke Dolphens, Stijn Vansteelandt, Barbara Cagnie, Andry Vleeming, Jo Nijs, Guy Vanderstraeten, Lieven Danneels
PURPOSE: To investigate the factors related to the 1-month period prevalence of low back pain (LBP), neck pain (NP) and thoracic spine pain (TSP) in young adolescents, thereby considering potential correlates from the physical, sociodemographic, lifestyle, psychosocial and comorbid pain domains. METHODS: In this cross-sectional baseline study, 69 factors potentially associated with spinal pain were assessed among 842 healthy adolescents before pubertal peak growth...
September 2016: European Spine Journal
Eline De Ridder, Lieven Danneels, Andry Vleeming, Guy Vanderstraeten, Maarten Van Ranst, Jessica Van Oosterwijck
Trunk extension exercises are used to train endurance and strength of the trunk extensor muscles. Appropriate exercise dosage is crucial to achieve specific training effects, however literature describing the relation between the predetermined exercise intensity and the actual trunk extensors activity is scarce and inconclusive. To examine whether the actual activity of the thoracic and lumbar extensors during extensions exercises correspond with the predetermined intensity, electromyographic evaluation of the trunk extensors was performed during trunk extension exercises at various intensities expressed as percentages of 1-RM...
August 2015: Journal of Electromyography and Kinesiology
A Vleeming, M D Schuenke, L Danneels, F H Willard
The thoracolumbar fascia (TLF) consists of aponeurotic and fascial layers that interweave the paraspinal and abdominal muscles into a complex matrix stabilizing the lumbosacral spine. To better understand low back pain, it is essential to appreciate how these muscles cooperate to influence lumbopelvic stability. This study tested the following hypotheses: (i) pressure within the TLF's paraspinal muscular compartment (PMC) alters load transfer between the TLF's posterior and middle layers (PLF and MLF); and (ii) with increased tension of the common tendon of the transversus abdominis (CTrA) and internal oblique muscles and incremental PMC pressure, fascial tension is primarily transferred to the PLF...
October 2014: Journal of Anatomy
E M D De Ridder, J O Van Oosterwijck, A Vleeming, G G Vanderstraeten, L A Danneels
The present study examined the activity levels of the thoracic and lumbar extensor muscles during different extension exercise modalities in healthy individuals. Therefore, 14 subjects performed four different types of extension exercises in prone position: dynamic trunk extension, dynamic-static trunk extension, dynamic leg extension, and dynamic-static leg extension. Pre- and post-exercise muscle functional magnetic resonance imaging scans from the latissimus dorsi, the thoracic and lumbar parts of the longissimus, iliocostalis, and multifidus were performed...
April 2015: Scandinavian Journal of Medicine & Science in Sports
Mieke Dolphens, Barbara Cagnie, Andry Vleeming, Guy Vanderstraeten, Lieven Danneels
The aim of this study was to analyze gender differences in sagittal standing alignment at pre-peak height velocity age thereby applying a scientifically sound and practically oriented classification scheme for overall standing balance. The study population consisted of healthy boys (n = 639) and girls (n = 557) before pubertal peak growth. During subjects' habitual standing, sagittal plane measures of the spine, pelvis and lower limbs were collected using a clinical screening protocol. With each subject classified as one of three postural types (neutral, sway-back, or leaning-forward), differences in sagittal plane alignment were analyzed between sexes...
December 2013: Journal of Anatomy
Mieke Dolphens, Barbara Cagnie, Pascal Coorevits, Andry Vleeming, Tanneke Palmans, Lieven Danneels
BACKGROUND/PURPOSE: Measurement and classification of standing posture in the sagittal plane has important clinical implications for adolescent spinal disorders. Previous work using cluster analysis on three gross body segment orientation parameters (lower limbs, trunk, and entire body inclination) has identified three distinct postural groups of healthy subjects before pubertal peak growth: "neutral", "sway-back", and "leaning-forward". Although accurate postural subgrouping may be proposed to be crucial in understanding biomechanical challenges posed by usual standing, there is currently no objective method available for class assignment...
March 2014: European Spine Journal
Mieke Dolphens, Barbara Cagnie, Pascal Coorevits, Andry Vleeming, Guy Vanderstraeten, Lieven Danneels
PURPOSE: The purpose of this cohort study was to classify sagittal standing alignment of pre-peak height velocity (pre-PHV) girls, and to evaluate whether identified subgroups were associated with measures of spinal pain. This study further aimed at drawing attention to similarities and differences between the current postural classification and a previous system determined among pre-PHV boys. METHODS: 557 pre-PHV girls [mean age, 10.6 years (SD, 0.47 years)] participated in the study...
January 2014: European Spine Journal
R Stoeckart, A Vleeming, J L Simons, R P van Helvoirt, C J Snijders
In embalmed preparations, the antebrachial fascia in the lateral elbow region is shown to be deformed by load application to the triceps muscle. From this fascia, muscles arise which are primarily concerned with the extension of wrist and fingers. In the case of lateral epicondylitis (tennis elbow), the superficial site of attachment of these extensors at the lateral epicondyle is extremely painful. Triceps training may help to diminish (or prevent) this pain by altering the forces acting at the lateral epicondyle...
February 1991: Clinical Biomechanics
C J Snijders, A Vleeming, R Stoeckart
We developed a biomechanical model of load transfer by the sacroiliac joints in relation to posture. A description is given of two ways in which the transfer of lumbar load to the pelvis in a stooped posture can take place. One way concerns ligament and muscle forces that act on the sacrum, raising the tendency of the sacrum to flex in relation to the hip bones. The other refers to ligament and muscle forces acting on the iliac crests, raising the tendency of the sacrum to shift in caudal direction in relation to the hip bones...
November 1993: Clinical Biomechanics
C J Snijders, A Vleeming, R Stoeckart
This study deals primarily with the stability of the base of the spine. The sacroiliac joints are vulnerable to shear loading on account of their predominantly flat surfaces. This raises the question of what mechanisms are brought into action to prevent dislocation of the sacroiliac joints when they are loaded by the weight of the upper part of the body and by trunk muscle forces. First a model is introduced to compare load transfer in joints with spherical and with flat joint surfaces. Next we consider a biomechanical model for the equilibrium of the sacrum under load, describing a self-bracing effect that protects the sacroiliac joints against shear according to 'the sacroiliac joint compression theory', which has been demonstrated in vitro...
November 1993: Clinical Biomechanics
A Vleeming, J P Van Wingerden, P F Dijkstra, R Stoeckart, C J Snijders, T Stijnen
Movement in eight sacroiliac joints was measured in preparations of embalmed elderly humans and compared with radiological findings. For the biomechanical part of the study the connections between sacrum and fifth lumbar vertebra were spared, as were the surrounding ligaments. The pelvis-spine preparation was fixed at the fifth lumbar vertebra. To induce movement, forces were directed at the acetabula. With digital displacement meters rotation was measured between the sacral and iliac part of the sacroiliac joint...
August 1992: Clinical Biomechanics
Eline Md De Ridder, Jessica O Van Oosterwijck, Andry Vleeming, Guy G Vanderstraeten, Lieven A Danneels
BACKGROUND: Back extension exercises are often used in the rehabilitation of low back pain. However, at present it is not clear how the posterior muscles are recruited during different types of extension exercises. Therefore, the present study will evaluate the myoelectric activity of thoracic, lumbar and hip extensor muscles during different extension exercises in healthy persons. Based on these physiological observations we will make recommendations regarding the use of extensions exercises in clinical practice...
2013: BMC Musculoskeletal Disorders
Mieke Dolphens, Barbara Cagnie, Pascal Coorevits, Andry Vleeming, Lieven Danneels
STUDY DESIGN: Cohort study. OBJECTIVE: To construct a sagittal standing alignment classification system in which the clinical significance of identified subgroups was considered with spinal pain measures. SUMMARY OF BACKGROUND DATA: Numerous grading systems for the categorization of sagittal standing alignment have been devised. However, no common consensus exists about which typology should be adopted. Furthermore, the clinical significance of proposed classification schemes has rarely been assessed in terms of their relationship with spinal pain...
July 15, 2013: Spine
A Vleeming, M D Schuenke, A T Masi, J E Carreiro, L Danneels, F H Willard
This article focuses on the (functional) anatomy and biomechanics of the pelvic girdle and specifically the sacroiliac joints (SIJs). The SIJs are essential for effective load transfer between the spine and legs. The sacrum, pelvis and spine, and the connections to the arms, legs and head, are functionally interrelated through muscular, fascial and ligamentous interconnections. A historical overview is presented on pelvic and especially SIJ research, followed by a general functional anatomical overview of the pelvis...
December 2012: Journal of Anatomy
Mieke Dolphens, Barbara Cagnie, Andry Vleeming, Guy Vanderstraeten, Pascal Coorevits, Lieven Danneels
INTRODUCTION: From a clinical point of view, knowledge of customary standing positions among healthy young adolescents is of primary importance. The purpose of this study was to document the correlations between sagittal standing posture parameters in a pre-peak height velocity (pre-PHV) cohort. MATERIALS AND METHODS: This cohort study included 639 pre-PHV boys (age 12.6 [SD, 0.54] years) and 557 pre-PHV girls (age 10.6 [SD, 0.47] years). Gross body segment orientations and spinopelvic orientation/shape indexes were quantified using a clinical screening protocol...
November 2012: European Spine Journal
F H Willard, A Vleeming, M D Schuenke, L Danneels, R Schleip
In this overview, new and existent material on the organization and composition of the thoracolumbar fascia (TLF) will be evaluated in respect to its anatomy, innervation biomechanics and clinical relevance. The integration of the passive connective tissues of the TLF and active muscular structures surrounding this structure are discussed, and the relevance of their mutual interactions in relation to low back and pelvic pain reviewed. The TLF is a girdling structure consisting of several aponeurotic and fascial layers that separates the paraspinal muscles from the muscles of the posterior abdominal wall...
December 2012: Journal of Anatomy
M D Schuenke, A Vleeming, T Van Hoof, F H Willard
Movement and stability of the lumbosacral region is contingent on the balance of forces distributed through the myofascial planes associated with the thoracolumbar fascia (TLF). This structure is located at the common intersection of several extremity muscles (e.g. latissimus dorsi and gluteus maximus), as well as hypaxial (e.g. ventral trunk muscles) and epaxial (paraspinal) muscles. The mechanical properties of the fascial constituents establish the parameters guiding the dynamic interaction of muscle groups that stabilize the lumbosacral spine...
December 2012: Journal of Anatomy
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