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Depressive Symptoms and Amygdala Volume in Elderly with Cerebral Small Vessel Disease: The RUN DMC Study

I W M van Uden1, A G W van Norden, K F de Laat

  • 1Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Medical Centre, Reinier Postlaan 4, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands.

Journal of Aging Research
|October 19, 2011
PubMed

Insights

Late onset depressive symptoms (LODS) in elderly are linked to smaller amygdala volume, independent of cerebral small vessel disease (SVD). A reduced left amygdala size may increase vulnerability to developing depression later in life.

Area of Science:

  • Neurology
  • Psychiatry
  • Neuroimaging

Background:

  • Late onset depressive symptoms (LODS) are common in elderly individuals with cerebral small vessel disease (SVD).
  • Cerebral small vessel disease alone does not fully explain the occurrence of LODS.
  • Amygdala volume is a potential contributing factor to LODS.

Purpose of the Study:

  • To investigate the relationship between amygdala volume and LODS.
  • To determine if this relationship is independent of SVD.
  • To explore potential neurobiological underpinnings of depression in SVD patients.

Main Methods:

  • Studied 503 participants with symptomatic cerebral SVD.
  • Utilized FLAIR and T1 MRI scans for neuroimaging.
  • Assessed depressive symptoms via structured questionnaires and manually segmented amygdala and white matter lesions (WML).

Main Results:

  • Patients with LODS exhibited significantly lower left amygdala volume compared to those without LODS (P = 0.02), irrespective of SVD.
  • A decrease in total amygdala volume was associated with an increased risk of LODS (OR = 1.77; P = 0.04).

Conclusions:

  • Reduced left amygdala volume is independently associated with LODS in patients with SVD.
  • This finding suggests that individuals with smaller amygdala volumes may be more susceptible to developing late-life depression.
  • Differential mechanisms beyond SVD may contribute to LODS, highlighting the amygdala's role.

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