angelsfere.blogg.se - Sinach Chain

The number of simultaneously moving segments is typically limited to one.

During the seated knee extension exercise, the motion primarily occurs in the sagittal plane.

Open kinetic chain movements occur in one primary axis.

For example, when doing a seated knee-extension the primary stress to the joint is the rotation of the distal tibia on the proximal femur even though other accessory movements like rolling and translation occur.

Open kinetic chain exercises are typically characterized by a rotary stress pattern at the joint.

Characteristics of Open Kinetic Chain Exercises Thus the distal segment of the extremity is free to move in space, for example: waving a hand, moving the foot during the swing phase of gait, or doing a seated knee extension. Steindler defined an open kinetic chain as “a combination of successively arranged joints in which the terminal segments can move freely”. This series, or chains, can be open or closed. He suggested that the extremities should rather be thought of as rigid, overlapping segments in series and he defined the kinetic chain as a “combination of several successively arranged joints constituting a complex motor unit.” In 1995, Dr Arthur Steindler adapted Reuleaux’s theory and included the analysis of human movement, sport-specific activity patterns and exercise. He proposed that rigid, overlapping segments were connected via joints and this created a system whereby movement at one joint produced or affected movement at another joint in the kinetic link. The concept was introduced by Franz Reuleaux, a mechanical engineer, in 1875. It is used in a wide variety of clinical conditions, including musculoskeletal, sports medicine, neuro-rehabilitation as well as prosthetics and Introduction to Orthotics. The kinetic chain (sometimes called the kinematic chain) is an engineering concept used to describe human movement.