A discussion of new notions on the phonological loop, which was first proposed as an articulatory loop and later reformulated, follows (Gathercole and Baddley, 1989). New elaborations are offered by Burgess and Hitch (1999). In their extensive and comprehensive review, two relevant concepts are the two components of the loop— rehearsal and phonological store. Recent brain imaging research, as well as traditional brain lesion data, supports this division.