KNES 385 Lecture Notes - Lecture 3: Ground Reaction Force, Electroencephalography, Positron Emission Tomography
11 Sep 2016
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Outcome measures do not tell us how a result was achieved. To understand what underlies performance, we need process measures: kinematics, kinetics, emg, brain activity/imaging. Measures which describe motion, without regard to the cause of that motion. Muybridge (1878) in california, was the first to capture serial images of fast animal motion: flight phase of gait cycle (when all 4 feet are off the ground) Modern systems such as optotrak use infra-red technology to relay the spatio-temporal positions of markers: 3-d data can be captured at 1000-hz, both methods provide raw data in the form of x, y, z coordinates. From this, we can do the following: Relative motion is the motion of one segment or point in a configuration relative to another: postural coordinate patterns pay attention to shoulder, hip, ankle. When talking about coordination we are talking about relative body segments patterning to one another or the environmental stimuli.
