Multiple Fregoli delusions after traumatic brain injury

A 61 year old man after a traumatic brain injury resulting in right frontal and left temporoparietal contusions developed florid Fregoli-type misident ifications. Extensive neuropsychological testing demonstrated significant d eficits in executive and memory functions. The patient's neuropsychological profile closely resembled that seen in previously reported patients with C apgras syndrome. Our findings are consistent with the hypothesis that a com bination of executive and memory deficits may account for cases of delusion al misidentification associated with brain lesions. However, the form which the delusion takes may be influenced by other factors including motivation .