Multi-segmental thoracic spine kinematics measured dynamically in the young and elderly during flexion

Ignasiak, Dominika; Rüeger, Andrea; Ferguson, Stephen J.

doi:10.1016/j.humov.2017.05.011

Cited by 30 publications

(35 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the lifting activity, we additionally applied a quintic polynomial function to all sagittal plane spinal marker trajectories (i.e. C7 to S1) to derive segmental angles (angles between the normal lines passing through the individual marker positions) of the L1/L2, L2/L3, L3/L4, L4/L5 and L5/S1 spinal units [23,24]. Information on maker placement accuracy and soft tissue artifacts can be found elsewhere [52,67].…”

Section: Methodsmentioning

confidence: 99%

Fear avoidance beliefs limit lumbar spine flexion during object lifting in pain-free adults

Knechtle

Schmid

Suter

et al. 2020

Preprint

View full text Add to dashboard Cite

There is a long-held belief that physical activities such as lifting with a flexed spine is generally harmful for the back and can cause low back pain (LBP), potentially nurturing fear avoidance beliefs underlying pain-related fear. In chronic LBP patients, pain-related fear has been shown to be associated with reduced lumbar range of motion during lifting, indicating distinct and probably protective psychomotor responses to pain. However, despite short term beneficial effects for tissue health, recent evidence suggests that maintaining a protective trunk movement strategy may also pose a risk for (persistent) LBP due to possible pro-nociceptive consequences of altered spinal kinematics, reflected by increased loading on lumbar tissues and persistent muscle tension. Yet, it is unknown if similar psychomotor interactions already exist in pain-free individuals which would yield potential insights into how a person might react when they experience LBP. Therefore, the aim of this study is to test the impact of pain-related fear on spinal kinematics in a healthy cohort of pain-free adults without a history of chronic pain. The study subjects (N=57) filled out several pain-related fear questionnaires and were asked to perform a lifting task (5kg-box). High-resolution spinal kinematics were assessed using an optical motion capturing system. Time-sensitive analyses were performed based on statistical parametric mapping. The results demonstrated time-specific and negative relationships between self-report measures of pain-related fear and lumbar spine flexion angles during lifting, yielding important implications regarding unfavorable psychomotor interactions that might become relevant in a future LBP incident.

show abstract

Section: Methodsmentioning

confidence: 99%

Fear avoidance beliefs limit lumbar spine flexion during object lifting in pain-free adults

Knechtle

Schmid

Suter

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Total ROM was defined as the largest magnitude of angular motion between neutral, flexion, and extension trials (for flexion – extension), and between neutral, left, and right trials (for lateral bending and axial rotation). Circle fitting (Schmid et al, 2016) and polynomial fitting (Ignasiak et al, 2017) approaches were also applied to estimate sagittal plane angles from marker data, with details and results provided in Supplement 2.…”

Section: Methodsmentioning

confidence: 99%

“…surgical planning, tracking rehabilitation progress). Opto-electronic motion capture systems have been used to measure trunk posture and motion (Hidalgo et al, 2012; Ignasiak et al, 2017; Marich et al, 2017; Nairn et al, 2013; Preuss and Popovic, 2010; Rast et al, 2016; Schmid et al, 2016), but there is no preferred or standardized method. Establishing motion capture reliability in assessing three-dimensional spine position would facilitate its use in clinical studies and clinical trials.…”

Section: Introductionmentioning

confidence: 99%

Between-session reliability of opto-electronic motion capture in measuring sagittal posture and 3-D ranges of motion of the thoracolumbar spine

Mousavi

Tromp

Swann

et al. 2018

Journal of Biomechanics

View full text Add to dashboard Cite

This study evaluated between-session reliability of opto-electronic motion capture to measure trunk posture and three-dimensional ranges of motion (ROM). Nineteen healthy participants aged 24-74 years underwent spine curvature, pelvic tilt and trunk ROM measurements on two separate occasions. Rigid four-marker clusters were attached to the skin overlying seven spinous processes, plus single markers on pelvis landmarks. Rigid body rotations of spine marker clusters were calculated to determine neutral posture and ROM in flexion, extension, total lateral bending (left-right) and total axial rotation (left-right). Segmental spine ROM values were in line with previous reports using opto-electronic motion capture. Intraclass correlation coefficients (ICC) and standard error of measurement (SEM) were calculated as measures of between-session reliability and measurement error, respectively. Retroreflective markers showed fair to excellent between-session reliability to measure thoracic kyphosis, lumbar lordosis, and pelvic tilt (ICC = 0.82, 0.63, and 0.54, respectively). Thoracic and lumbar segments showed highest reliabilities in total axial rotation (ICC = 0.78) and flexion-extension (ICC = 0.77-0.79) ROM, respectively. Pelvic segment showed highest ICC values in flexion (ICC = 0.78) and total axial rotation (ICC = 0.81) trials. Furthermore, it was estimated that four or fewer repeated trials would provide good reliability for key ROM outcomes, including lumbar flexion, thoracic and lumbar lateral bending, and thoracic axial rotation. This demonstration of reliability is a necessary precursor to quantifying spine kinematics in clinical studies, including assessing changes due to clinical treatment or disease progression.

show abstract

“…Polynomial angle ( F.Poly.C7; F.Poly.T4 ): Using the 19 digitized points, a quadratic polynomial was fit to the points between C7 and T12 using MATLAB. Angles were calculated as the intersection of the two lines normal to the curve at C7‐T12 ( F.Poly.C7 ), and at T4‐T12 ( F.Poly.T4 ) 32 …”

Section: Methodsmentioning

confidence: 99%

Validity of flexicurve and motion capture for measurements of thoracic kyphosis vs standing radiographic measurements

et al. 2020

View full text Add to dashboard Cite

Thoracic kyphosis varies among healthy adults and typically increases with age. Excessive kyphosis (hyperkyphosis) is associated with negative health. Spinal alignment also affects spine loading, with implications for conditions such as vertebral fractures and back pain. Valid measurements of kyphosis are necessary for clinical and research assessment of age-related posture changes, and to support improved biomechanical understating of spine conditions. Independent validation of non-radiographic techniques, however, remains limited. The goal of this study was to compare standing radiographic kyphosis measurements with non-radiographic measurements and predictions of thoracic kyphosis using flexicurve and motion analysis markers, in order to determine their validity. Thirteen non-radiographic measures of thoracic kyphosis were obtained in each of 40 adult subjects who also underwent standing radiographs of the thoracic spine. Measures included estimates derived by fitting of polynomials or circles to the non-radiographic data, as well as predictions calculated using previously published methods. Intra-class correlations (ICC) and root-mean square errors (RMSEs) were calculated between radiographic and non-radiographic measures to determine validity. Most non-radiographic estimates of kyphosis show similar, weak to moderate levels of validity when compared to radiographic measurements, and RMSEs ranging from 8.0 to 20.8. Unbiased estimates of radiographic measurements with moderate to good ICCs were identified, however, based on marker measurements, and new prediction equations were created with similar validity that also account for age and body habitus. Clinical significance: These non-radiographic measurements of thoracic kyphosis can be applied to clinical practice or to clinical studies with recognition of specific limitations.

show abstract

Multi-segmental thoracic spine kinematics measured dynamically in the young and elderly during flexion

Cited by 30 publications

References 48 publications

Fear avoidance beliefs limit lumbar spine flexion during object lifting in pain-free adults

Fear avoidance beliefs limit lumbar spine flexion during object lifting in pain-free adults

Between-session reliability of opto-electronic motion capture in measuring sagittal posture and 3-D ranges of motion of the thoracolumbar spine

Validity of flexicurve and motion capture for measurements of thoracic kyphosis vs standing radiographic measurements

Contact Info

Product

Resources

About