The Hypothalamic-Pituitary-Adrenal (HPA) Axis
A comprehensive exploration of the primary stress response system. This entry details the neuroendocrine cascade involving corticotropin-releasing hormone (CRH), adrenocorticotropic hormone (ACTH), and cortisol, and its regulatory feedback loops.
Cortisol and Cognitive Function
Examines the inverted-U relationship between cortisol levels and hippocampal function, detailing effects on memory consolidation and retrieval under varying stress conditions.
Oxytocin and Social Bonding Mechanisms
Analysis of the neuropeptide oxytocin's role in pair bonding, maternal behavior, and trust. Includes recent findings on receptor density variations in social anxiety disorders.
Allostatic Load and Chronic Stress
Defines the cumulative wear and tear on the body resulting from chronic adaptation to stressors. Discusses long-term physiological consequences including metabolic syndrome and neurodegeneration.
Neuroimmunology: Stress and Immunity
Explores the bidirectional communication between the brain and immune system, highlighting how psychological stress modulates inflammatory cytokine production.
Epigenetic Modifications by Early Stress
Investigates how early life adversity induces epigenetic changes in glucocorticoid receptor genes, altering HPA axis reactivity in adulthood.
Circadian Rhythms and Cortisol Rhythmicity
Details the diurnal variation of cortisol secretion and its disruption in shift work, jet lag, and mood disorders like depression.