Limbic response to stress linking life trauma and hypothalamus-pituitary-adrenal axis function

Psychoneuroendocrinology
Dongju SeoRajita Sinha

Abstract

Trauma alters neuroendocrine responses to stress and increases vulnerability to stress-related disorders. Yet, relationships among trauma, stress-induced neural changes and hypothalamic-pituitary-adrenal (HPA) axis activity have not been determined. The present study used functional magnetic resonance imaging to investigate the impact of life trauma on basal cortisol levels and neural responses to acute stress in 73 healthy individuals during brief stress and neutral-relaxing imagery using a well-established, individualized imagery method. We hypothesized that trauma experience would have a negative impact on brain function, resulting in altered basal cortisol levels via dysregulated neural control over the HPA axis system. Results showed that higher life trauma exposure was significantly associated with lower basal cortisol levels. Neuroimaging results indicated that both higher life trauma and low morning cortisol levels were associated with increased response to acute stress in limbic-medial temporal lobe (MTL) regions including the amygdala and hippocampus. A mediation analysis showed that increased limbic-MTL response to stress mediated the relationship between life trauma and low cortisol levels. Findings revealed a signi...Continue Reading

Citations

Apr 5, 2020·Brain Structure & Function·Johannes BechCarsten R Bjarkam
Jul 28, 2019·Frontiers in Neuroendocrinology·Josep Moreno-Rius
Jan 20, 2021·Pediatric Research·Marcela LopezKanwaljeet J S Anand
Mar 30, 2021·European Psychiatry : the Journal of the Association of European Psychiatrists·Synve Hoffart LundingNils Eiel Steen
Jun 28, 2021·Neuropsychologia·Marie-Luise BrandiLeonhard Schilbach

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