A Tocatta is a piece for solo instrument (most of the times keyboard), usually featuring very fast, virtuosic sections. The first tocattas date from the late Reinassance, and consist of scale-driven pieces for keyboard, in which the left hand performs a very simple accompaniment. The Baroque toccata puts even more emphasis on the improvisational feel, reaching extreme levels of dexterity and extravagance, and including brief imitative sections. After the baroque period the form became less usual.