Ventral pallidum roles in reward and motivation

KS Smith, AJ Tindell, JW Aldridge… - Behavioural brain research, 2009 - Elsevier
KS Smith, AJ Tindell, JW Aldridge, KC Berridge
Behavioural brain research, 2009Elsevier
In recent years the ventral pallidum has become a focus of great research interest as a
mechanism of reward and incentive motivation. As a major output for limbic signals, the
ventral pallidum was once associated primarily with motor functions rather than regarded as
a reward structure in its own right. However, ample evidence now suggests that ventral
pallidum function is a major mechanism of reward in the brain. We review data indicating
that (1) an intact ventral pallidum is necessary for normal reward and motivation,(2) …
In recent years the ventral pallidum has become a focus of great research interest as a mechanism of reward and incentive motivation. As a major output for limbic signals, the ventral pallidum was once associated primarily with motor functions rather than regarded as a reward structure in its own right. However, ample evidence now suggests that ventral pallidum function is a major mechanism of reward in the brain. We review data indicating that (1) an intact ventral pallidum is necessary for normal reward and motivation, (2) stimulated activation of ventral pallidum is sufficient to cause reward and motivation enhancements, and (3) activation patterns in ventral pallidum neurons specifically encode reward and motivation signals via phasic bursts of excitation to incentive and hedonic stimuli. We conclude that the ventral pallidum may serve as an important ‘limbic final common pathway’ for mesocorticolimbic processing of many rewards.
Elsevier