We present the case of an extra-articular lateral tenodesis for an anterior cruciate ligament (ACL) deficient knee. A 46-year-old male patient sustained an ACL graft rupture after a motorcycle accident. He complained of rotational instability and giving-way episodes. His previous graft was fixed by an intra-articular femoral staple that was not possible to remove at the time of the ACL revision...

The magneto-rotational instability (MRI) is the most likely mechanism for transportation of angular momentum and dissipation energy within hot, ionized accretion discs. This produced through interactions a differentially rotating plasma with an embedded magnetic field. Like all substances in nature, disc has potential to become magnetically polarized when it interacts In this paper, we study ef...

We present nonlinear three-dimensional simulations of the stably-stratified portion of the solar tachocline in which the rotational shear is maintained by mechanical forcing. When a broad toroidal field profile is specified as an initial condition, a clam-shell instability ensues which is similar to the freely-evolving cases studied previously. After the initial nonlinear saturation, the residu...

Several biomechanical studies have demonstrated the importance of the anterolateral ligament (ALL) in rotational instability of the knee. Despite this, the precise role of the ALL in eliminating the pivot shift remains controversial. This disparity exists secondary to the nature of cadaveric research and the subsequent creation of artificial injury patterns that are not a true representation of...