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  2. Hooke's law - Wikipedia

    en.wikipedia.org/wiki/Hooke's_law

    In physics, Hooke's law is an empirical law which states that the force (F) needed to extend or compress a spring by some distance (x) scales linearly with respect to that distance—that is, F s = kx, where k is a constant factor characteristic of the spring (i.e., its stiffness), and x is small compared to the total possible deformation of the spring.

  3. Sacroiliac joint dysfunction - Wikipedia

    en.wikipedia.org/wiki/Sacroiliac_joint_dysfunction

    Muscles and ligaments surround and attach to the SI joint in the front and back, primarily on the ilial or sacral surfaces. These can all be a source of pain and inflammation if the SI joint is dysfunctional. [9] [2] The sacroiliac joint is highly dependent on its strong ligamentous structure for support and stability. [9]

  4. Dynamic response index - Wikipedia

    en.wikipedia.org/wiki/Dynamic_response_index

    The DRI is derived as the solution to an equation which models the human spine as a lumped single-degree-of-freedom spring-shock absorber system. The model uses an ordinary linear second-order differential equation with constant coefficients with spinal compression as the variable. The forcing function in the equation is the accelerative shock ...

  5. List of equations in classical mechanics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    For a stretched spring fixed at one end obeying Hooke's law, the elastic potential energy is Δ E p = 1 2 k ( r 2 − r 1 ) 2 {\displaystyle \Delta E_{p}={\frac {1}{2}}k(r_{2}-r_{1})^{2}} where r 2 and r 1 are collinear coordinates of the free end of the spring, in the direction of the extension/compression, and k is the spring constant.

  6. Sacroiliitis - Wikipedia

    en.wikipedia.org/wiki/Sacroiliitis

    Often patients will find relief through a combination of rest, heat / ice therapy, physical therapy and anti-inflammatory medication, like ibuprofen. Together these simple treatments help reduce inflammation in the affected SI joints. [3] For more severe forms of sacroiliitis, sacroiliac joint injections might be recommended to help combat ...

  7. Back injury - Wikipedia

    en.wikipedia.org/wiki/Back_injury

    Cold therapy reduces inflammation, edema, pain, and muscle spasms associated with acute back injury. [19] Heat therapy is used to reduce pain and alleviate sore and stiff muscles. [19] Heat therapy is proposed to work by facilitating delivery of nutrients and oxygen to the site of injury to accommodate healing. [19]

  8. Surgery for the dysfunctional sacroiliac joint - Wikipedia

    en.wikipedia.org/wiki/Surgery_for_the...

    Due to its location in the lower back, a dysfunctional sacroiliac joint may cause lower back and/or leg pain. The resulting leg pain can be severe, resembling sciatica or a slipped disc. While nonsurgical treatments are effective for some, others have found that surgery for the dysfunctional sacroiliac joint is the only method to relieve pain.

  9. Joint manipulation - Wikipedia

    en.wikipedia.org/wiki/Joint_manipulation

    However, after re-examining the original studies on which the kinematic models of joint manipulation were based, Evans and Breen [8] argued that the optimal prethrust position is actually the equivalent of the neutral zone of the individual joint, which is the motion region of the joint where the passive osteoligamentous stability mechanisms ...