title: On the difficulties of separating retinal from cortical origins of phosphenes when using transcranial alternating current stimulation (tACS).
authors.forename: Walter
authors.initials: W
authors.lastname: Paulus
mesh_terms: D046690:Deep Brain Stimulation / Q000379:methods; D006801:Humans; D010719:Phosphenes / Q000502:physiology*; D012160:Retina / Q000502:physiology*; D014793:Visual Cortex / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology