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Q: What could be a cause of ergonomic injury?
A: MSDs are injuries and disorders of the muscles, nerves, tendons, ligaments, joints, cartilage and spinal discs. MSDs can be directly and indirectly related to aspects of the work or the work environment known as risk factors. [ Non-work activities and environments that expose people to these risk factors can also cause or contribute to MSDs. When an MSD is associated with work it is usually
referred to as a Work Related Musculoskeletal Disorder (WRMSD or WMSD). Other terms, such as cumulative trauma disorder (CTD), repetitive stress injury (RSI), and repetitive motion injury (RMI), mean roughly the same thing as MSD. However, RSI and RMI are arguably inaccurate, because these terms imply that repetition is the primary risk factor, which may or may not be the case. MSD risk factors can be defined as actions in (or out of) the workplace, workplace (or non-workplace) conditions, or a combination thereof that may cause or aggravate an MSD. Examples include forceful exertions, awkward postures, repetitive exertions, and exposure to environmental factors like extreme heat, cold, humidity or vibration. It is often a combination of these risk factors that, over time, can lead to pain, injury, and disability. These risk factors can be reduced through informed purchasing and workplace design, retrofit engineering controls, administrative controls, work practice definitions, or in some cases, personal protective equipment. The manner in which a risk factor leads to an injury/disorder is usually through the accumulation of exposure to the risk factors. An event such as lifting, pushing, or pulling may stress body tissues, yet the exposure may be too low for traumatic injury, and the tissues recover. Repeated exposure to this stress, on the other hand, may interfere with the normal recovery process and produce disproportionate responses and eventually an MSD type injury. Traumatic injuries, such as an overexertion injury, may occur due to cumulative effects that manifest themselves suddenly at the time of a specific event, or they may occur because the event exposes the body to risk factors that exceed the person's individual capabilities. ]
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Asked 8/24/2011 9:20:40 AM
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