The cardinal features of Parkinson disease (PD) often begin focally, typically in one limb, and may remain relatively restricted to one side of the body for many years. It is now well established that dopaminergic neurons in the ventro-lateral tier of the substantia nigra pars compacta (SNpc), which project mainly to the caudal putamen, are the first to degenerate in the initial phase of PD (Fe...

Physical activity behavior varies naturally from day to day, from week to week and even across seasons. In order to assess the habitual level of physical activity of a person, the person must be monitored for long enough so that the level can be identified, taking into account this natural within-person variation. An important question, and one whose answer has implications for study- and surve...

In order to address the claims that mobile phone usage is addictive, a study was undertaken to categorize mobile phone usage behaviour based on the underlying motivation. Six categories were identified: addictive, compulsive, dependent, habitual, voluntary and mandatory. A survey of 184 students found that the behaviour cannot be conclusively categorized as any specific type, although there was...