Momentform is a description of a style of musical composition devised by Stockhausen and first used in his piece Kontakte. The key idea is that a piece is constructed so that each moment is appreciable in its own right; by contrast, most traditional musical forms are based around the idea of some kind of temporal structure such as narrative or development.
I wonder if there is some scope for this as the basis for a musical form that would be appreciated by people with memory problems and dementia. One of the features of many kinds of dementia is that patients find it difficult to form a coherent structure from what is happening in the world. Perhaps, rather than trying to force a narrative-based musical form on such a person, we should be inventing forms that are appropriate for them.