Abstract: Objective To investigate the implicit memory in brain injured patients. Methods 24 brain injury patients and 24 normal controls were estimated by Montreal Cognitive Assessment (MoCA) Beijing version, a fragmented picture naming task and a fragmented Chinese character identification task. Results The scores of 2 tasks were both lower in the patient group than in the control group (P<0.01). The implicit memory negatively correlated with the score of perceptual closure in both groups (P<0.05). Conclusion Implicit memory is possible to be concerned with occipital, frontal and temporal lobe.

Key words: implicit memory, fragmented picture naming, fragmented Chinese character identification, perceptual closure