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Fronto-limbic disconnection in bipolar disorder
- Source :
- ResearcherID
- Publication Year :
- 2014
-
Abstract
- Background:Bipolar disorder (BD) is a severe, disabling and life-threatening illness. Disturbances in emotion and affective processing are core features of the disorder with affective instability being paralleled by mood-congruent biases in information processing that influence evaluative processes and social judgment. Several lines of evidence, coming from neuropsychological and imaging studies, suggest that disrupted neural connectivity could play a role in the mechanistic explanation of these cognitive and emotional symptoms. The aim of the present study is to investigate the effective connectivity in a sample of bipolar patients.Methods:Dynamic causal modeling (DCM) technique was used to study 52 inpatients affected by bipolar disorders consecutively admitted to San Raffaele hospital in Milano and forty healthy subjects. A face-matching task was used as activation paradigm.Results:Patients with BD showed a significantly reduced endogenous connectivity in the DLPFC to Amy connection. There was no significant group effect upon the endogenous connection from Amy to ACC, from ACC to Amy and from DLPFC to ACC.Conclusions:Both DLPFC and ACC are part of a network implicated in emotion regulation and share strong reciprocal connections with the amygdale. The pattern of abnormal or reduced connectivity between DLPFC and amygdala may reflect abnormal modulation of mood and emotion typical of bipolar patients.
- Subjects :
- Adult
Male
medicine.medical_specialty
Bipolar Disorder
Emotions
Prefrontal Cortex
Affect (psychology)
Amygdala
Severity of Illness Index
03 medical and health sciences
0302 clinical medicine
Neuroimaging
medicine
Humans
Bipolar disorder
Age of Onset
Prefrontal cortex
Psychiatry
Neuropsychology
Cognition
Bayes Theorem
Middle Aged
medicine.disease
Magnetic Resonance Imaging
030227 psychiatry
Psychiatry and Mental health
Affect
Mood
medicine.anatomical_structure
Female
Psychology
Neuroscience
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 09249338
- Database :
- OpenAIRE
- Journal :
- ResearcherID
- Accession number :
- edsair.doi.dedup.....4438e4937e5bc51c2f98961ef37f330e