An analysis has been performed of the theories and postulates advanced by von Neumann, London and Bauer, and Wigner, concerning the role that consciousness might play in the collapse of the wave function, which has become known as the measurement problem.
giving out or weakness of the knees can have different causes. These can include problems outside the knee joint itself (weak muscles for example) or inside the knee (torn ligaments or cartilage). See an orthopaedic surgeon to address your individual problem.
Key points. 1  A popliteal cyst, also known as a Bakerâs cyst, is a fluid-filled swelling that causes a lump at the back of the knee. 2  Common causes of a popliteal cyst include damage to the kneeâs cartilage and rheumatoid arthritis.