Effects of Parkinson's disease and dopamine on digit span measures of working memory.
John Patrick GroganLisa Emily KnightLaura SmithNerea Irigoras IzagirreAlexandra HowatBrogan Elizabeth KnightAnastasia BickertonHanna Kristiina IsotalusElizabeth Jane CoulthardPublished in: Psychopharmacology (2018)
This suggests that the deficit of maintenance capacity and manipulation accuracy in PD patients is not primarily a dopaminergic one and supports a potential "overdosing" of intact manipulation mechanisms in healthy older adults by levodopa.