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Posterior Lateral Rotary Instability of the Elbow by Lauren Hogan, PT, DPT, OCS, ATC
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Posterior lateral rotary instability (PLRI) of the elbow is usually the result of a lateral or radial collateral ligament injury. When this occurs, the proximal radioulnar complex can supinate or externally rotate away from the trochlea of the humerus. This will cause a subluxation of the humeroulnar and humeroradial joints (1). It is not the same as a radial head dislocation, as the annular ligament is generally intact. The mechanism of injury is often due to valgus stress, combined with axial loading and supination, which ..>>read more |
Peroneal Nerve Entrapment by Michelle Kornder, SPT
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The common peroneal nerve, also known as the common fibular nerve, external popliteal nerve, peroneal nerve, or lateral popliteal nerve, is formed from the L4, L5, S1, and S2 nerve roots. The nerve separates from the sciatic nerve in the upper popliteal fossa, runs behind the fibular head, travels down the fibula behind the peroneus longus muscle, and splits into the superficial and deep peroneal nerves. The superficial peroneal nerve innervates the peroneus longus and ..>>read more
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