What roles do mesolimbic and neostriatal dopamine systems play in reward? Do they
mediate the hedonic impact of rewarding stimuli? Do they mediate hedonic reward learning …

The hypothesis that dopamine is important for reward has been proposed in a number of
forms, each of which has been challenged. Normally, rewarding stimuli such as food, water …

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

Introduction Debate continues over the precise causal contribution made by mesolimbic
dopamine systems to reward. There are three competing explanatory categories:'liking' …

Emotions are multifaceted, but a key aspect of emotion involves the assessment of the value
of environmental stimuli. This article reviews the many psychological representations …

Apathy and anhedonia are common syndromes of motivation that are associated with a wide
range of brain disorders and have no established therapies. Research using animal models …

Since its first edition, An Introduction to Theories of Learning has provided a uniquely
swee** review of the major learning theories from the 20th century that profoundly …

Anhedonia, or markedly diminished interest or pleasure, is a hallmark symptom of major
depression, schizophrenia and other neuropsychiatric disorders. Over the past three …

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

A framework for mental fatigue is proposed, that involves an integrated evaluation of both
expected rewards and energetical costs associated with continued performance. Adequate …