**Neumes are the basic elements of Western and Eastern systems of musical notation prior to the invention of five-line staff notation. The word neume is a Middle English corruption of the ultimately Greek word for breath (pneuma : p?e?µa). The earliest neumes were inflective marks which indicated the general shape but not necessarily the exact notes or rhythms to be sung. Later developments included the use of heightened neumes which showed the relative pitches between neumes, and the creation of a four-line musical staff that identified particular pitches. Neumes do not generally indicate rhythm, but additional symbols were sometimes juxtaposed with neumes to indicate changes in articulation, duration, or tempo. NEUMATIC notation was later used in medieval music to indicate certain patterns of rhythm called rhythmic modes, and eventually evolved into modern musical notation. NEUMATIC notation remains standard in modern editions of plainchant.**