Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Trunk stability and spinal load during MMH lifting.

Authors
Granata-KP
Source
NIOSH 2001 Apr; :1-6
Link
NIOSHTIC No.
20023616
Abstract
Occupationally related low back disorders (LBDs) are the leading cause of lost work days and the most costly occupational safety and health problem facing industry today. It is well known that LBD risk is associated with manual materials handling (MMH) and are influenced by MMH lifting parameters, specifically trunk posture and lifting task design. However, a major limitation in controlling the incidence of occupational LBDs is the inability to explain the injury mechanism to the lumbar spine (the most common type of injury). The scientific community has overlooked the influence of trunk and spinal stability as a cause of occupational LDD. When the trunk / spine is unstable, the tolerance to compressive forces on the spine is dramatically reduced. Therefore, an unstable spine may fail even if the applied load is a mere fraction of the recommended limits. The goals of this research were to evaluate whether the neuromuscular system attempts to control stability of the spine, and whether trunk posture during MMH lifting influences the stability of the spine. It was hypothesized that the risk of LBD in asymmetric and flexed postures is partially related to reduced spinal stability in these postures. Results confirmed that the neuromotor system actively modifies muscle recruitment patterns in response to stability requirements. Results also demonstrate the spine is less stable in assymetric postures. In trunk flexed postures, physiological constraints limit the ability to achieve spinal stability. Thus, the risk of LBDs may be related to spinal stability.
Keywords
Back-injuries; Musculoskeletal-system; Musculoskeletal-system-disorders; Posture; Spine; Spinal-disorders; Spinal-stability; Muscular-disorders; Neuromuscular-system; Neuromuscular-system-disorders; Manual-lifting; Manual-materials-handling; Author Keywords: Low-Back pain; Lifting; Stability; Muscle; Coactivation
Contact
Kevin P Granata, PhD, Motion Analysis and Motor Performance Laboratory, Kluge Children's Rehabilitation Center, University of Virginia, 2270 Ivy Road, Charlottesville, VA 22903
Publication Date
20010401
Document Type
Final Grant Report
Funding Amount
160768
Funding Type
Grant
Fiscal Year
2001
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-000158
NIOSH Division
OEP
Priority Area
Disease and Injury: Low Back Disorders
Source Name
National Institute for Occupational Safety and Health
State
VA
Performing Organization
Motion Analysis and Motor Performance Laboratory, Kluge Children's Rehabilitation Center, University of Virginia, Charlottesville VA
TOP