... daily living, quality of life, and evolution of the motor disorder. Finally,we examine biological markers and neuroimaging correlates of depression in PD and discuss potential underlying mechanisms ... on both hands, mild rigidity and bradykinesia in the upper limbs,gait slowness, and mild postural instability. He cried during the interview, and worriedabout being unable to continue his work ... characterized by increasing disabilities and partial dependence formost ADLs such as eating, dressing, and washing. All cardinal symptoms ofthe disease are markedly worse. During stage 5, the...