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From the Department of Neurology (Dr. D'Esposito), University of Pennsylvania, Philadelphia, PA; the Memory Disorders Research Center (Drs. Verfaellie and Alexander) and Department of Neurology (Drs. Alexander and Katz), Boston University School of Medicine, Boston, MA; and Braintree Hospital (Drs. Alexander and Katz), Braintree, MA.
Supported in part by NINDS program project grant NS 26985 to the Boston University School of Medicine.
Received August 16, 1994. Accepted in final form December 30, 1994.
Address correspondence and reprint requests to Dr. Mark D'Esposito, Cognitive Neurology Section, Department of Neurology, Hospital of the University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104-4283.
There is controversy regarding the effect of isolated fornix damage on human memory.We report a patient who suffered a traumatic penetrating head injury that resulted in a significant and persistent anterograde amnesia. CT revealed a lesion that involved the region of the proximal, posterior portion of both fornices without evidence of damage to other hippocampal pathways or to other structures known to be critical for memory, such as the hippocampus, thalamus, or basal forebrain. The unique location of the lesion in this patient provides evidence supporting the role of isolated fornix lesions in amnesia.
NEUROLOGY 1995;45: 1546-1550
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