Stress Quote by Robert M. Sapolsky
““Stress and glucocorticoids have inverted-U effects here as well. Moderate, transient stress (or exposure to the equivalent glucocorticoid levels) increases spine number in the hippocampus; sustained stress or glucocor-ticoid exposure does the opposite.7 Moreover, major depression or anxiety—two disorders associated with elevated glucocorticoid levels—can reduce hippocampal dendrite and spine number. This arises from decreased levels of that key growth factor mentioned earlier this chapter, BDNF. Sustained stress and glucocorticoids also cause dendritic retraction and synapse loss, lower levels of NCAM (a “neural cell adhesion molecule” that stabilizes synapses), and less glutamate release in the frontal cortex.””
About This Quote
Source Book: Why Zebras Don't Get Ulcers, 1994
Moderate stress can enhance brain plasticity, but chronic stress harms neural structures and reduces growth factors.
In simple terms: Stress helps up to a point.
Key Takeaway
Manage stress levels for brain health.
Themes
stress
neurobiology
health
Mood
cautious
informed
Type
educational
scientific
When to use this quote
- clinical psychology
- neuroscience
Key Concepts
cortisol
BDNF
neural plasticity
Practical Applications
- high‑pressure jobs
- academic study
- personal health
Questions to Reflect On
- How can you mitigate long‑term stress effects?
- What habits protect brain health under pressure?
A Different Perspective
Chronic stress may be unavoidable in some roles.
