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Parkinson's disease, personality, and dopamine
M A Menza1, N E Forman, H S Goldstein
1Department of Psychiatry, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, New Brunswick 08903-0019.
The Journal of Neuropsychiatry and Clinical Neurosciences
|January 1, 1990
Summary
Parkinson's disease patients exhibit reduced novelty-seeking behavior, a trait linked to dopamine. This study found no significant differences in behaviors associated with serotonin or norepinephrine, suggesting a specific dopaminergic link to personality changes in Parkinson's.
Area of Science:
- Neuroscience
- Psychiatry
- Behavioral Science
Background:
- Clinical observations suggest a link between Parkinson's disease (PD) and specific personality traits like inflexibility.
- Premorbid and post-onset personality changes in PD patients have been anecdotally reported.
- The role of neurotransmitters, particularly dopamine, in personality is increasingly recognized.
Purpose of the Study:
- To investigate the association between personality traits and Parkinson's disease.
- To examine differences in dopamine-dependent behaviors between PD patients and healthy controls.
- To explore the relationship between neurotransmitter systems (dopamine, serotonin, norepinephrine) and personality in PD.
Main Methods:
- Utilized the Tridimensional Personality Questionnaire (TPQ) for personality assessment.
- Compared personality profiles of Parkinson's disease patients with matched control subjects.
- Analyzed behaviors associated with dopamine, serotonin, and norepinephrine dependency.
Main Results:
- Parkinson's disease patients showed significantly lower novelty-seeking behavior compared to controls.
- Novelty-seeking behavior is hypothesized to be dopamine-dependent.
- No significant differences were found in behaviors dependent on serotonin and norepinephrine between the groups.
Conclusions:
- The findings support an association between reduced dopamine function and specific personality alterations in Parkinson's disease.
- This suggests a potential mechanism linking dopaminergic systems to personality traits in the context of PD.
- Further research is warranted to elucidate the precise neurobiological underpinnings of personality changes in PD.