Unmoving and unmoved: experiences and consequences of impaired non-verbal expressivity in Parkinson's patients and their spouses.

Hypomimia, or facial masking, is a decrease in voluntary control and spontaneous movement of the muscles of the face, which may occur in Parkinson's disease. Little is known about the psychosocial consequences or management of this symptom. The aim of this study was to provide an initial overview of patient & spousal experiences of living with an acquired nonverbal expressive impairment in Parkinson's disease.

The time-course of activation in the dorsal and ventral visual streams during landmark cueing and perceptual discrimination tasks.

Different patterns of high density EEG activity were elicited by the same peripheral stimuli, in the context of Landmark Cueing and Perceptual Discrimination tasks. The C1 component of the visual event-related potential (ERP) at parietal - occipital electrode sites was larger in the Landmark Cueing task, and source localisation suggested greater activation in the superior parietal lobule (SPL) in this task, compared to the Perceptual Discrimination task, indicating stronger early recruitment of the dorsal visual stream. In the Perceptual Discrimination task, source localisation suggested widespread activation of the inferior temporal gyrus (ITG) and fusiform gyrus (FFG), structures associated with the ventral visual stream, during the early phase of the P1 ERP component.