“Indeed, closure derives its power as a musical effect from the fact that short-term memory is limited to chunks, and the need to connect those chunks together.
In this sense, exerting control over the strength of phrase boundaries represents a creative exploitation of the limitations of our own short-term memories.
After all, if it were not for the limits of STM, there would be no need for any boundaries or any kind of “units” at all.
The phrase units of short-term memory are not frozen in time.
Because the front edge of consciousness is always moving forward in time, the time limit of STM forms a continuously moving window. “
Music and Memory