Locks, Keys and Muscular Weakness In this article, Neurology Expert Laurent Garosi explains an important cause of muscular weakness and collapse in dogs…Myasthenia Gravis. What is myasthenia gravis? Myasthenia Gravis (pronounced my-as-theen-ia grar-viss) is a common cause of generalised weakness in dogs and occasionally cats. It also occurs in humans. What happens in myasthenia gravis? […]