Motion Capture

Motion capture forms the foundation of human movement analysis. It encompasses any technique or method which records human movement. These can include optical and sensor- based approaches. Principia is at the forefront of sensor-based motion capture, which provide technologies that allow motion capture in any environment.

The Xsens MVN system consists of a set of inertial measurement units (IMU’s) placed on the human body segments. Each IMU consists of an accelerometer, gyroscope and magnetometer, through a process of sensor fusion, these signals calculate an orientation, or how something is positioned/directed in space.

These orientations are applied to an underlying biomechanical model with each sensor representing the orientation of its corresponding body segment. Once the model is scaled and calibrated to the individual, complete human motion measurement can be performed of a human. Most recently, the latest engine also integrates GPS signals to allow position aiding.

Muscle activation analysis (Electromyography)

Electromyography (EMG) is the field dedicated to measurement of the electrical activity of muscle. The musculoskeletal system is governed by the nervous system through a series of afferent (sensory) and efferent (motor) neural signals. Essentially, an efferent electrical signal is sent to the corresponding muscle that can produce a given movement or stabilization, initiating muscle activation and the onset of force.

EMG’s provide a method of measuring this activation and holds valuable information in muscle activation patterns, as well as the degree of muscle co-contraction that occurs at joints. Principia Technology has the ability to perform laboratory EMG, as well as portable EMG out in the field. Such knowledge allows one to see asymmetries in muscle activation profiles, which may indicate onset of fatigue.

Electromyography (muscle activation analysis)
musculoskeletal model

Musculoskeletal modelling

Generate detailed analysis of what your body is doing at the musculoskeletal level. Understand what forces your muscles are producing, and what loads travel through your joints.