I place under this name the basslines that are very closed to the pattern played by the drummer, and particulary the bass drum pattern. Listen for example to Mike Porcaro in some songs by Toto ( note the extrem efficiency! “Porgy Georgy”) .

The bassist and drummer build a rhythmic pattern together , and the bass and bass drum will play a common motif , that the bassist will embellish with a few fills of course! ( Fill: ornamentation )

The bass player must concentrate to be synchronized with the bass drum.

We're going to study some of those patterns , which will constitute a reserve of ideas for bass-drum sections