Kinematic and kinetic analysis of static sitting of patients with neuropathic spine deformity

Murans, Girts; Gutierrez-Farewik, Elena M.; Saraste, Helena

doi:10.1016/j.gaitpost.2011.07.009

Cited by 12 publications

(14 citation statements)

References 24 publications

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“…This balanced coupling pattern could create a temporary curvature of the spine on the coronal plane (Fig. 5), which is similar to the phenomenon of the so-called 'compensatory scoliosis' [18,[24][25][26]. The compensatory scoliosis implies a physiologic coordination of local scoliosis to maintain a global balance of the whole body posture.…”

Section: Discussionmentioning

confidence: 93%

Investigation of coupled bending of the lumbar spine during dynamic axial rotation of the body

et al. 2013

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Purpose Little is known about the coupled motions of the spine during functional dynamic motion of the body. This study investigated the in vivo characteristic motion patterns of the human lumbar spine during a dynamic axial rotation of the body. Specifically, the contribution of each motion segment to the lumbar axial rotation and the coupled bending of the vertebrae during the dynamic axial rotation of the body were analyzed. Methods Eight asymptomatic subjects (M/F, 7/1; age, 40-60 years) were recruited. The lumbar segment of each subject was MRI scanned for construction of 3D models of the vertebrae from L2 to S1. The lumbar spine was then imaged using a dual fluoroscopic system while the subject performed a dynamic axial rotation from maximal left to maximal right in a standing position. The 3D vertebral models and the fluoroscopic images were used to reproduce the in vivo vertebral motion. In this study, we analyzed the primary left-right axial rotation, the coupled left-right bending of each vertebral segment from L2 to S1 levels. ResultsThe primary axial rotations of all segments (L2-S1) followed the direction of the body axial rotation. Contributions of each to the overall segment axial rotation were 6.7°± 3.0°(27.9 %) for the L2-L3, 4.4°± 1.2°( 18.5 %) for the L3-L4, 6.4°± 2.2°(26.7 %) for the L4-L5, and 6.4°± 2.6°(27.0 %) for the L5-S1 vertebral motion segments. The upper segments of L2-L3 and L3-L4 demonstrated a coupled contralateral bending towards the opposite direction of the axial rotation, while the lower segments of L4-L5 and L5-S1 demonstrated a coupled ipsilateral bending motion towards the same direction of the axial rotation. Strong correlation between the primary axial rotation and the coupled bending was found at each vertebral level. We did not observe patterns of coupled flexion/extension rotation with the primary axial rotation. Conclusions This study demonstrated that a dynamic lumbar axial rotation coupling with lateral bendings is segment-dependent and can create a coordinated dynamic coupling to maintain the global dynamic balance of the body. The results could improve our understanding of the normal physiologic lumbar axial rotation and to establish guidelines for diagnosing pathological lumbar motion.

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Section: Discussionmentioning

confidence: 93%

Investigation of coupled bending of the lumbar spine during dynamic axial rotation of the body

et al. 2013

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“…Previous studies have quantified posture using photographs [6][7][8], radiographs [9][10][11], rastersterography [12][13][14] and three-dimensional (3D) motion capture systems [15][16][17][18]; most of these have value and application in research, but are rarely practical in a clinical setting.…”

Section: Discussionmentioning

confidence: 99%

A video based method to quantify posture of the head and trunk in sitting

et al. 2017

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Maintenance of a vertically aligned posture of the head and trunk in sitting is a fundamental skill that demonstrates the presence of neuromotor control. Clinical assessments of posture are generally subjective. Studies have quantified posture using different technologies, but the application of such technologies in a clinical environment remains difficult. Video recordings, however, are easily used clinically and have potential for quantitative analysis of movement. This study used a video-based method to generate a numerical measure of postural alignment of the head and trunk in sitting. Static and dynamic trials of 12 healthy seated adults were simultaneously recorded with a sagittal video camera and a 3D motion capture system. Segmental angles were calculated for the Head, Neck and six Trunk segments. An agreed definition of aligned static sitting posture agreed was used by five clinically experienced experts to identify video frames where the participants' posture was aligned. The five subsets of frames that defined the aligned posture were combined to give aligned segments (mean±SD) for each participant. Agreement between experts in the definition (mean) of aligned segmental angles was excellent (ICC=0.99) and intra-assessor reliability (SD) lay within 2.1°-11.6°. Agreement between the video-based method and the 3D system was below 3.8° and 8.4° for static and dynamic trials respectively. This video-based method allowed the quantification of sitting posture and provided greater detail of the trunk/spinal profile than previous methods. It has potential as a complementary tool, alongside subjective assessments, for patients with a wide variety of pathologies.

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“…The adopted approach to seating included wedge 10 cushioning to level the pelvis with a firm seat base, a hip strap, aligning the trunk with 11 a padded backrest on tension adjustable straps, lateral supports to facilitate head 12 position and supporting the forearms on arm supports [33]. …”

Section: Accepted Manuscriptmentioning

confidence: 99%

Early limited instrumentation of scoliosis in Duchenne muscular dystrophy: is a single-rod construct sufficient?

Cawley¹,

Carmody²,

Dodds³

et al. 2015

The Spine Journal

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Kinematic and kinetic analysis of static sitting of patients with neuropathic spine deformity

Cited by 12 publications

References 24 publications

Investigation of coupled bending of the lumbar spine during dynamic axial rotation of the body

Investigation of coupled bending of the lumbar spine during dynamic axial rotation of the body

A video based method to quantify posture of the head and trunk in sitting

Early limited instrumentation of scoliosis in Duchenne muscular dystrophy: is a single-rod construct sufficient?

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