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Emotional hyper-reactivity in normothymic bipolar patients
Katia M'bailara1, Jacques Demotes-Mainard, Joël Swendsen
1Département de Psychiatrie Adulte, CHS Charles Perrens, Bordeaux, France.
Bipolar Disorders
|January 13, 2009
Summary
Normothymic bipolar patients show heightened emotional reactivity, particularly in neutral situations. This emotional hyper-reactivity may indicate a risk factor and potential endophenotype for bipolar disorder.
Area of Science:
- Psychiatry
- Neuroscience
- Affective Science
Background:
- Normothymic states in bipolar disorder are typically symptom-free.
- Bipolar patients experience subsyndromal symptoms and comorbidities for extended periods.
- Previous research indicated higher emotional lability and intensity in normothymic bipolar patients.
Purpose of the Study:
- To investigate the emotional reactivity of normothymic bipolar patients.
- To compare emotional responses between normothymic bipolar patients and healthy controls during mood induction.
Main Methods:
- 145 subjects (55 normothymic bipolar patients, 90 controls) viewed 18 International Affective Picture System images (positive, negative, neutral).
- Subjective valence and arousal were measured using the Self-Assessment Manikin.
- Startle reflexes were recorded in response to auditory stimuli during image viewing.
Main Results:
- Normothymic bipolar patients and controls rated positive/negative images similarly.
- Neutral images elicited greater pleasantness and arousal in bipolar patients.
- Bipolar patients exhibited a stronger startle reflex to neutral stimuli compared to controls.
Conclusions:
- Normothymic bipolar patients demonstrate emotional hyper-reactivity, especially in neutral contexts.
- This heightened reactivity may represent an endophenotype or risk factor for bipolar disorder.
- Findings suggest implications for managing bipolar disorder between acute episodes.
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