Verbal short-term memory. Colour PositronEmission Tomography (PET) scan of the human brainshowing areas involved in verbal short-term memory. Here, the left cerebral hemisphere isseen. Highlighted in green-red are two regions ofhigh-activity associated with Broca's area (atleft) and the inferior parietal/superior temporalcortex (at right). These regions were activatedwhen the subject was keeping in mind a string ofletters for a few seconds. Active areas showcerebral blood flow detected by PET, and thensuperimposed onto a three-dimensional MRI(Magnetic Resonance Image) view of the brain.
