orbitofrontal cortex

Meaning: The orbitofrontal cortex (OFC) is the ventral surface of the prefrontal cortex in the frontal lobe, lying just above the orbits (eye sockets). It receives sensory input and connections from limbic structures such as the amygdala, and it helps assign value to possible outcomes. In this way emotion and reward information can shape decisions. The OFC therefore contributes to impulse control, emotional regulation, and socially appropriate behavior.

On the MCAT: Expect it in questions on frontal lobe function, decision-making, or personality change. The classic case is Phineas Gage, whose frontal lobe injury was followed by reported impulsivity, poor planning, and inappropriate social behavior, while his memory and speech stayed largely intact. You may be asked to predict the deficit after damage: poor judgment, disinhibition, or risky choices despite knowing the consequences. A passage may also show imaging in which this area is active while a person evaluates rewards or punishments.

Common confusion: The frontal lobe also holds the primary motor cortex and Broca's area, but OFC damage is not typically linked to paralysis or loss of speech production. Do not swap it with the amygdala either. The amygdala generates fear and other emotional responses, while the OFC helps evaluate and regulate them from the top down. Gage's injury is usually described as prefrontal in general, so do not treat it as purely orbitofrontal.