neuregulin isoforms, neuregulin polypeptides, and uses thereof. The present invention relates to novel therapeutic and diagnostic uses of soluble isoforms and neuregulin-1 polypeptides, particularly neurological disorders.isoformas de neuregulin, polipeptídeos de neuregulin, e usos dos mesmos. a presente invenção refere-se a novos usos terapêuticos e diagnósticos de isoformas solúveis e polipeptídeos de neuregulin-1, particularmente distúrbios neurológicos.