Prefrontal Cortex

The prefrontal cortex is the front part of the brain's frontal lobes, behind the forehead. Neuroscience reviews link it to executive functions: the processes that let a person hold a goal in mind, keep information available while working with it, and hold back the first impulse.

Definition

The prefrontal cortex is the foremost region of the cerebral cortex, in the frontal lobes. Reviews of the research associate it with the core executive functions: working memory (holding information in mind and using it), inhibitory control (holding back an automatic reaction) and cognitive flexibility (shifting perspective or strategy), together with planning toward a goal.

Deep Understanding

The same literature describes these abilities as easily disrupted. One review of animal and human studies reports that even mild acute stress, when it feels uncontrollable, can quickly impair prefrontal abilities such as working memory and the regulation of attention, and that under stress the control of behaviour shifts toward faster, more reflexive circuits. Another review notes that executive functions tend to suffer early when a person is stressed, sad, lonely or short of sleep.

On this site the prefrontal cortex appears as a modern analogy for what Greek contemplative texts call nous, the faculty that can tell a reaction from a response. It is an analogy, not an identity: nous in those texts is not a brain region, and the comparison says nothing about what any practice does to the brain.

Primary sources

• Executive Functions, Annual Review of Psychology 64 (2013): 135–168, doi:10.1146/annurev-psych-113011-143750: a review defining the core executive functions (inhibitory control, working memory, cognitive flexibility) and noting that they and the prefrontal cortex suffer first under stress, sadness, loneliness and lack of sleep. Open-access copy
• Stress signalling pathways that impair prefrontal cortex structure and function, Nature Reviews Neuroscience 10 (2009): 410–422, doi:10.1038/nrn2648: a review reporting that acute uncontrollable stress impairs prefrontal cognitive functions in humans and animals and shifts control of behaviour toward more reflexive circuits. Open-access copy

In Practice

The site's practices meet this term at one point: the moment before a reaction. The Sacred Pause asks you to notice the impulse, take one slow breath and only then answer. Take it as a contemplative exercise; nothing on this page claims that it trains or strengthens a region of the brain.

Stefan's Alkimia. (2026, October 4). Prefrontal Cortex. Pleroma Guide. https://pleroma.guide/en/lexicon/prefrontal-cortex

Stefan's Alkimia. “Prefrontal Cortex.” Pleroma Guide, 4 Oct. 2026, pleroma.guide/en/lexicon/prefrontal-cortex.

Stefan's Alkimia. “Prefrontal Cortex.” Pleroma Guide. April 21, 2026. Last modified October 4, 2026. https://pleroma.guide/en/lexicon/prefrontal-cortex.

@online{alkimia2026prefrontalcortex,
  author = {{Stefan's Alkimia}},
  title = {{Prefrontal Cortex}},
  organization = {{Pleroma Guide}},
  date = {2026-04-21},
  year = {2026},
  note = {Last modified 2026-10-04},
  url = {https://pleroma.guide/en/lexicon/prefrontal-cortex},
  langid = {english}
}