Prefrontal Cortex — Function, Location & Quiz

The prefrontal cortex is less a single control centre than a set of frontal systems that keep goals active, compare options and restrain responses. That breadth is what makes it easy to confuse with the frontal lobe as a whole: motor regions execute actions, while prefrontal regions organize the behaviour around them.

Its clinical importance becomes clearest when basic intelligence survives but judgment, planning or social conduct changes. The famous frontal cases matter because they separate the ability to solve a test problem from the ability to steer a life.

Test this anatomy in the Brain Networks Quiz or open the interactive 3D brain model.

Location and anatomical map

Executive functions, decision-making, working memory, personality.

Atlas category: cortical. Brodmann areas or landmark: BA 9, 10, 46.

Functions

  • Working memory — maintaining and manipulating information online
  • Executive control — planning, decision-making, cognitive flexibility
  • Personality and social behavior regulation
  • Impulse control and delayed gratification
  • Abstract reasoning and goal-directed behavior

Pathways and connections

  • Dorsolateral PFC ↔ Basal Ganglia (cognitive loop)
  • Ventromedial PFC ↔ Amygdala (emotion regulation)
  • PFC ↔ Hippocampus (memory retrieval & context)
  • Frontoparietal network (attention & control)

Clinical relevance

  • Phineas Gage (1848) — iron rod through left PFC → personality change, impulsivity, poor social judgment
  • Patient EVR (Damasio) — vmPFC damage → intact IQ but catastrophic real-life decisions
  • Frontal lobe syndrome — apathy, disinhibition, poor planning
  • Damage impairs Iowa Gambling Task performance (somatic marker hypothesis)

Key facts

  • Last brain region to fully myelinate — not complete until age ~25
  • Largest proportion of frontal lobe in humans vs. other primates
  • Goldman-Rakic: dlPFC neurons show sustained firing during working memory delay periods
  • Default Mode Network hub — medial PFC active during self-referential thought

Exam tip

PFC = the 'CEO of the brain.' Dorsolateral = cold cognition (working memory). Ventromedial = hot cognition (emotion-guided decisions). Know the difference!

Common questions

What does the prefrontal cortex do?

It supports working memory, planning, cognitive flexibility, impulse control, abstract reasoning and goal-directed behaviour. Different prefrontal subdivisions emphasize cognitive control or emotion-guided decisions.

Where is the prefrontal cortex located?

It occupies the anterior part of the frontal cortex, in front of premotor and primary motor areas. Its major subdivisions include dorsolateral, ventromedial and frontopolar cortex.

What happens after prefrontal cortex damage?

Damage can produce a frontal lobe syndrome with poor planning, apathy, disinhibition, impulsivity or altered social judgment, even when language and general intelligence appear relatively intact.