Digit kinematics during typing with standard and ergonomic keyboard configurations

Using kinematic reduction for studying grasping postures. An application to power and precision grasp of cylinders

“…However, these observation-based techniques are prone to problems caused by the hands being hidden by the handled objects and by other parts of the body, are very time-consuming, and are less reliable than the methods that register joint angles directly (David, 2005), named direct methods. Among these methods, instrumented gloves and videogrammetry have been used for ergonomic applications (Baker et al, 2007a(Baker et al, , 2007bEndo et al, 2007;S anchezMargallo et al, 2014;Yun, 1993). Direct methods also allow velocities and accelerations of movements to be obtained, which are critical for the analysis of WMSD (Juul-Kristensen et al, 2001;Marras and Schoenmarklin, 1993).…”

“…When attempting to prevent WMSD, different interventions are performed, such as controlling postures, lowering the required grasp force or changing the shape and size of the grasped surface, among others (Harih, 2014;Kroemer, 1989). Traditionally, when analyzing the upper limb posture to determine the risk of developing WMSD, the focus is set on shoulder and wrist postures, although recent work has also shown interest in recording all hand joints with more detail (Baker et al, 2007a(Baker et al, , 2007bLee and Jung, 2015;Wang et al, 2015Wang et al, , 2014.…”

Validity and reliability of upper extremity three-dimensional kinematics during a typing task

“…Most of the studies conducted on the upper extremities provide descriptive data, such as range of motion (ROM), segmental movement, reaching or performance of activities of day living (e.g., combing hair, drinking) [18][19][20]. Few studies utilized 3D motion analysis to describe the kinematics of the upper extremities during typing [8,9,21]. Sommerich et al [22] described the overall joint posture, velocities, accelerations and the metacaparpophalangeal (MCP) and proximal interphalangeal Computer use continues to be considered a risk factor for work-related musculoskeletal disorders despite a greater awareness of the risk associated with excessive use, the implementation of safety features and the introduction of extensive interventional programs.…”

Rater reliability and concurrent validity of the Keyboard Personal Computer Style instrument (K-PeCS)

“…The set-up of the VICON TM , marker placement, and the models used to develop the kinematics are described more fully elsewhere (Baker et al, 2007a).…”