Abstract: Functional magnetic resonance imaging (fMRI) is an imaging method of function brain area by stimulate in magnetic resonance facility; it can exactitude reflect the nerve activity level of brain and confirm the function brain area in alive body; it is a new impersonality imagine method to evaluate the cognitive function of human. Cognitive function obstacle is a clinical syndrome of damaging cognitive function by manifold reasons and can be leaded by many diseases in clinic. Studying changed function brain area by fMRI can offer an impersonality and intuition imagine evidence to forepart prevent, diagnose and therapy of the diseases of cognitive function obstacle.

Key words: functional magnetic resonance imaging (fMRI), cognitive function obstacle, review