A rigid body model of the dynamic posteroanterior motion response of the human lumbar spine

Keller, Tony S.; Colloca, Christopher J.

doi:10.1067/mmt.2002.127079

Cited by 19 publications

(19 citation statements)

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“…It is hypothesized that higher peak forces may cause a greater magnitude vertebral displacements during chiropractic adjustments. 28 Previous biomechanical comparisons of MFMA and HVLA spinal manipulation have raised the issue of effective transmitted force distribution locally to the spine. Specifically, global measures of loading have been found to overestimate the local effective forces at the target site.…”

Section: Discussionmentioning

confidence: 99%

“…37,38 Greater forces, thus, may result in greater intersegmental and segmental motion responses of functional spinal units. 28,39,40 A structural model of the lumbar spine has been developed to characterize the sagittal plane static, sinusoidal, and impulsive motion response of lumbar spine segments. 39 The model provides data on segmental and intersegmental motion patterns that are otherwise difficult to obtain experimentally.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of Mechanical Force of Manually Assisted Chiropractic Adjusting Instruments

Colloca

Keller

Black

et al. 2005

Journal of Manipulative and Physiological Therapeutics

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Comparison of Mechanical Force of Manually Assisted Chiropractic Adjusting Instruments

Colloca

Keller

Black

et al. 2005

Journal of Manipulative and Physiological Therapeutics

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“…The manipulative force has been described as an explicit function of the clinician's mass and impact velocity and the intrinsic stiffness and elasticity of both the clinician and patient (Haas, 1990a;Haas, 1990b). Experimentally, these forces have been measured directly or indirectly using treatment simulators (Keller & Colloca, 2002;Sran et al, 2004;Ianuzzi & Khalsa, 2005a;Sung et al, 2005), force platforms (Rogers & Triano, 2003;Tsung et al, 2005) and pressure sensitive mats (Herzog et al, 1993a;Herzog et al, 1997;Kirstukas & Backman, 1999;Herzog et al, 2001). …”

Section: Forces Applied During Spinal Manipulationmentioning

confidence: 99%

“…force) or the body's response to such an input (eg. vertebral displacement) Kirstukas & Backman, 1999;Keller et al, 2006b;Keller et al, 2006a;Colloca et al, 2006;Triano, 2001;Solinger, 2000;Keller & Colloca, 2002;Sung et al, 2005;Dishman et al, 2005;Pickar & Kang, 2006;Pickar et al, 2007;). …”

Section: Introductionmentioning

confidence: 99%

“…Spinal manipulation is described as a high velocity/low amplitude thrust utilizing manual manipulative (Triano, 2001;Symons et al, 2002;Herzog et al, 2001;Kawchuk et al, 2006) and mechanically-assisted or instrument-assisted techniques (Keller & Colloca, 2002;Keller et al, 2003;Colloca et al, 2006;Keller et al, 2006b;Keller et al, 2006a;Colloca et al, 2007). Surprisingly, the parameters of high velocity and low amplitude have never been directly measured with respect to the manipulative input.…”

Section: Introductionmentioning

confidence: 99%

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Acceleration of clinician hand movements during spinal manipulative therapy

Gelley¹,

Passmore

MacNeil

2015

Manual Therapy

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The primary objective of this study was to determine the acceleration characteristics of spinal manipulative therapy (SMT) and whether patient anthropometric parameters correlated with the SMT kinematic parameters. For this, a wireless tri-axial accelerometer was taped to the dorsum of a clinician's hand to record the accelerations generated during clinical treatment of 95 symptomatic patients. Peak acceleration magnitudes differed significantly between spinal levels (p<0.0001; lumbar > cervical > thoracic = sacroiliac). The latencies of these peaks were also significantly different (p<0.0001; lumbar < cervical = thoracic < sacroiliac). Within a given spinal level, acceleration amplitudes varied over a wide range with temporal parameters remaining relatively constant. Overall, anthropometric parameters were poorly correlated with SMT parameters. In summary, distinct acceleration amplitudes were observed across spinal levels with relatively constant temporal factors. Thus, clinicians appear to vary the magnitude rather than the duration of the SMT thrust.ii Acknowledgements

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An improved spinal injury parameter model for underbody impulsive loading scenarios

Shankar

2020

Numer Methods Biomed Eng

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Underbody blast events such as aircraft ejection, mine blast, and helicopter crashes pose a serious threat to occupants. These impulsive excitations exert substantial axial loads on the thoracolumbar spine causing severe injuries. The Dynamic Response Index (DRI), which is commonly used as the injury parameter for underbody loading scenarios, suffers from inherent disadvantages and has been reported to underpredict the chances of injury. The main reasons are the inability of the DRI model to account for bending loads and posture of the spine. Thus, a novel lumped full spine model capable of modelling the spine in different posture along the sagittal plane is formulated. The unavailable data for the model were obtained using inverse parameter identification approach by eigenfrequency matching. Each vertebra has three degrees of freedom: axial, shear, and rotary motion to model the flexion of the spine. A new injury parameter is proposed based on the sum of compressions caused due to axial and rotary springs at each vertebral level, to account for wedge compression and burst fractures. The results indicate that the model was able to predict the motions of vertebrae under different postures of the spine according to trends in literature.

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A rigid body model of the dynamic posteroanterior motion response of the human lumbar spine

Cited by 19 publications

References 0 publications

Comparison of Mechanical Force of Manually Assisted Chiropractic Adjusting Instruments

Comparison of Mechanical Force of Manually Assisted Chiropractic Adjusting Instruments

Acceleration of clinician hand movements during spinal manipulative therapy

An improved spinal injury parameter model for underbody impulsive loading scenarios

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