I am exhibit A in the argument that this is not correct.

RSNA: Coffee Boosts Short Term Memory - CME Teaching Brief - MedPage Today: "In a study of 15 healthy men ages 26 to 47, functional magnetic resonance imaging (fMRI) detected significant activity in the brain's memory centers 20 minutes after the men consumed 100 mg of caffeine, according an Austrian study reported at the Radiological Society of North America meeting here."