Adult polyglucosan body disease body disease do not have identified mutations in the "GBE1" gene. In these individuals, the cause of the disease is unknown. Along with evaluation of the symptoms and a neurological examination, a diagnosis can be made based on genetic testing. Whether or not a person is making sufficient amounts of functional glycogen branching enzyme can be determined by taking a skin biopsy and testing for activity of the enzyme. Examination of tissue biopsied from the sural nerve under a microscope can reveal the presence of polyglucosan bodies. There will also be white matter changes visible in a magnetic resonance imaging
Don Ritter (artist) of interactive art should be an aesthetically pleasing experience not only for the mind but also for the body". His software "Orpheus" (1987), which enabled an improvising musician to control the narrative projection of video, is an early example of an interactive video installation. In his 1993 interactive installation "Intersection", viewers cross a virtual highway in a large darkroom . The highway is represented by the computer-controlled sound of cars passing and coming to a screeching halt. Ritter has collaborated with the American trombonist George Lewis. Don Ritter (artist) Don Ritter (1959) is a Canadian artist known for his interactive