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NEUROLOGY 1989;39:853
© 1989 American Academy of Neurology

Memory during subclinical hippocampal seizures

P. A. Bridgman, MD, B. L. Malamut, MA, M. R. Sperling, MD, A. J. Saykin, PsyD and M. J. O'Connor, MD

Comprehensive Epilepsy Center, Graduate Hospital, University of Pennsylvania, Philadelphia, PA (Drs. Bridgman, Sperling, and O'Connor)
Department of Psychiatry, University of Pennsylvania, Philadelphia, PA (B. L. Malamut and Dr. Saykin)
Department of Neurology, University of Pennsylvania, Philadelphia, PA (Dr. Sperling)
Division of Neurosurgery, University of Pennsylvania, Philadelphia, PA (Dr. O'Connor).

We performed neuropsychological testing in 2 patients during subclinical hippocampal seizures recorded with depth electrodes. Neither subject showed impairment of consciousness, orientation, motor skills, or verbal fluency. The rapidity of recall of a well-learned word list was impaired in 1 subject during ictal fast spiking in the left hippocampus. Subclinical seizure activity may be responsible for a portion of the memory deficits found in patients with epilepsy.

Address correspondence and reprint requests to Dr. Bridgman, Neuroscience Institute, 930 Congress Street, Portland, ME 04102.

Presented in part at the forty-first annual meeting of the American Epilepsy Society, Baltimore, MD, December 1987.

Received July 28, 1988. Accepted for publication in final form January 4, 1989.




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