Mechanomyography (MMG) is non-invasive method that allow to study the mechanical events of a single muscle excitation-contraction coupling in vivo. Vibrations generated by the muscle contraction mechanism, produce waves. This phenomenon has been known for more than two centuries. MMG measures muscle vibrations by using microphones or accelerometers. The study of the muscle mechanical properties via 2D MMG analysis in time and frequency domains can be of importance in the query for work-related MSD indicators.
Relative high prevalence of work-related musculo-skeletal disorders are frequently observed in manual materials handling jobs. This disorders are often accompanied by pain in the low-back and neck-shoulder region. For this purpose the assessment of sensory and motor information is of relevance. Hence muscle sensitivity and surface EMG and MMG maps are valuable tools. Special focus is given on gender effects in order to explain the higher prevalence of work-related musculoskeletal disorders among females workers.
The aim of this project is to develop a new intelligent feedback system, that will allow to reveal muscle activity in muscles at risk for developing disorders during computer work. Recordings of the muscle electrical (EMG) and/or mechanical (MMG) activity could be used as feedback parameters to prevent the development of work-related MSD. A Samani is employed on this project done in collaboration with the Prof. K Søgaard, University of Southern Denmark and Dr. A Holtermann, National Research Centre for the Working Environment.
During pushing and pulling of waste container - Effects of the handgrip orientation. In order to decrease the physical loading, ergonomic interventions have been done, from lift/carry to push/pull within refuse collection. Furthermore, the knowledge regarding the mechanical load on the upper body during pushing and pulling of waste containers is still sparse. Refuse collection is a rather complicated movement that requires a three-dimension (3D) analysis. Measuring the upper extremities physical load can be helpful in the design of new ergonomic intervention (container design for instance).