Humans have big brains and our frontal lobes, just behind the forehead, are particularly huge. Injuries to this part of the brain often happen after blows to the head or a stroke. Paradoxically, some people with frontal lobe injuries can seem unaffected – until they’ve been carefully evaluated.
The frontal lobes are sometimes described as the executives of the brain, or conductors of the orchestra. Among other things, they control and organise our thinking and decision-making processes. You rely on your frontal lobes when you do things like make plans, switch from one activity to another, or resist temptation.
Some people with frontal lobe injuries seem completely normal in short one-to-one conversations, but they actually have great difficulty with everyday tasks, such as cooking, organising their paperwork or remembering to take medication. This is called the frontal lobe paradox because, even though these people seem unimpaired when assessed, they have significant difficulties in everyday life.