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Extension is the opposite of flexion, a straightening movement that increases the angle between body parts. [12] For example, when standing up, the knees are extended. When a joint can move forward and backward, such as the neck and trunk, extension is movement in the posterior direction. [ 10 ]
Movement assessment is the practice of analysing movement performance during functional tasks to determine the kinematics of individual joints and their effect on the kinetic chain. Three-dimensional or two-dimensional analysis of the biomechanics involved in sporting tasks can assist in prevention of injury and enhancing athletic performance.
The McKenzie protocol also now includes flexion protocols and stresses the importance of differentiating whether flexion or extension improves patient's symptoms. As a result, McKenzie principles are used by many physical therapists in the treatment of low back pain, whereas Williams Exercises are no longer taught as a physical therapy protocol.
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Tenodesis grasp and release is an orthopedic observation of a passive hand grasp and release mechanism, affected by wrist extension or flexion, respectively.It is caused by the manner of attachment of the finger tendons to the bones and the passive tension created by two-joint muscles used to produce a functional movement or task (tenodesis). [1]
"Bend your left ear down towards your left shoulder and then your right ear down towards your right shoulder" to test for pain free cervical spine lateral flexion. Now test for stiffness or pain flexing or extending the cervical spine: "bend your neck forwards to try to touch your chin against your chest." "bend your neck back to lift your chin."