PSYCH 012: Psychoneuroendocrinology

The mind does not exist in isolation from the body. This chapter explores psychoneuroendocrinology - the interface between brain, hormones, and behaviour - and how internal physiological states shape emotional and psychological experience.In this episode, we examine how the brain communicates with the endocrine system, particularly through the hypothalamic–pituitary–adrenal (HPA) axis. This system translates perception into physiological response, mobilising the body in the face of challenge and restoring balance afterwards.We explore how hormones such as cortisol act not only on the body, but back on the brain - influencing mood, cognition, memory, and perception. Stress is therefore not just a psychological experience, but a whole-body process with neural consequences.A central theme is regulation. Acute stress can be adaptive, sharpening attention and preparing for action. Chronic or dysregulated stress, however, can alter neural systems, impair resilience, and contribute to disorders such as depression, anxiety, and trauma-related conditions.This chapter reframes psychiatric symptoms as embodied phenomena. The boundary between mind and body dissolves - replaced by a continuous feedback loop in which each shapes the other.Key Takeaways* Psychoneuroendocrinology studies the interaction between brain, hormones, and behaviour.* The HPA axis is central to the stress response.* Hormones such as cortisol influence both body and brain function.* Stress responses can be adaptive in the short term but harmful when chronic or dysregulated.* Brain and endocrine systems operate in continuous feedback loops.* Dysregulation contributes to mood, anxiety, and trauma-related disorders.* Psychiatric symptoms are often embodied, not purely psychological. This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit drmanaankarray.substack.com/subscribe