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Updated: Jun 16, 2026
09:54
Comprehensive Profiling of Dopamine Regulation in Substantia Nigra and Ventral Tegmental Area
Published on: August 10, 2012
Inverted-U-shaped correlation between dopamine receptor availability in striatum and sensation seeking
Albert Gjedde1, Yoshitaka Kumakura, Paul Cumming
1Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark. gjedde@sund.ku.dk
Summary
Sensation seeking, a personality trait, shows an inverted-U relationship with dopamine D(2/3) receptor availability. This finding links personality, brain chemistry, and addictive behavior risk.
Area of Science:
- Neuroscience
- Psychology
- Behavioral Science
Background:
- Sensation seeking declines with age, mirroring decreased dopamine D(2/3) receptor availability.
- Novelty seeking inversely correlates with dopamine receptor availability.
Purpose of the Study:
- To investigate the hypothesized inverted-U-shaped relationship between sensation-seeking personality traits and dopamine D(2/3) receptor availability.
- To explore the neurobiological underpinnings of sensation seeking and its potential link to addictive behaviors.
Main Methods:
- Positron Emission Tomography (PET) was used to measure [(11)C]raclopride binding in the striatum of 18 healthy male participants.
- Participants completed the Zuckerman sensation-seeking scale to quantify personality traits.
Main Results:
- A significant inverted-U-shaped correlation was observed between Zuckerman scores and dopamine D(2/3) receptor availability.
- Maximum receptor binding potentials were found in individuals with mid-range sensation-seeking scores.
Conclusions:
- The findings support an inverted-U model for sensation seeking and dopamine receptor availability.
- This relationship may be explained by the "gain" or reactivity of dopaminergic neurotransmission, influencing motivation and vulnerability to addiction.
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