Motivational processes are complex and multifaceted, with both directional and activational
aspects. Behavioral activation and exertion of effort are functions that enable organisms to …

Nucleus accumbens dopamine is known to play a role in motivational processes, and
dysfunctions of mesolimbic dopamine may contribute to motivational symptoms of …

Fatigue is commonly reported in many neurologic illnesses, including multiple sclerosis,
Parkinson disease, myasthenia gravis, traumatic brain injury, and stroke. Fatigue contributes …

Motivation has been defined as the process that allows organisms to regulate their internal
and external environment, and control the probability, proximity and availability of stimuli. As …

Fatigue can have a major impact on an individual's performance and wellbeing, yet is poorly
understood, even within the scientific community. There is no developed theory of its origins …

Objective: Parkinson's disease (PD) is a progressive neurological disorder characterised by
a large number of motor and non-motor features that can impact on function to a variable …

We performed a multicenter survey using a semistructured interview in 1,072 consecutive
patients with Parkinson's disease (PD) enrolled during 12 months in 55 Italian centers to …

Much is known about the physiological impairments that can cause muscle fatigue. It is
known that fatigue can be caused by many different mechanisms, ranging from the …

Objectives: Although fatigue is experienced by everyone, its definition and classification
remains under debate. Methods: A review of the previously published data on fatigue …

Background: Physical activity (PA) is increasingly advocated as an adjunct intervention for
individuals with Parkinson's disease (PD). However, the specific benefits of PA on the wide …