Hippocampal contribution to verbal recent memory following dominant-hemisphere temporal lobectomy

J Clin Exp Neuropsychol. 1991 Jul;13(4):575-86. doi: 10.1080/01688639108401072.

Abstract

The effects of hippocampal encroachment in the language dominant-hemisphere were studied in 41 patients who underwent previous temporal lobectomy (TL). Patients undergoing dominant-hemisphere TL including anterior hippocampus (n = 13) performed significantly worse than nondominant TL patients (n = 16) on a verbal learning test (Selective Reminding; p less than or equal to .00001), thereby confirming the sensitivity of this procedure to lateralized temporal-lobe dysfunction. However, no significant difference was present on this or other primary measures of material-specific memory when contrasting dominant TL patients in whom the anterior hippocampus was spared (n = 12) to those in whom anterior hippocampus was resected. These data suggest that more extensive and posterior mesial temporal-lobe resection is not necessarily associated with a greater verbal material-specific memory deficit following dominant-hemisphere temporal lobectomy.

MeSH terms

  • Adult
  • Brain Mapping
  • Dominance, Cerebral / physiology*
  • Epilepsy, Temporal Lobe / physiopathology*
  • Epilepsy, Temporal Lobe / surgery*
  • Female
  • Hippocampus / physiopathology*
  • Humans
  • Male
  • Mental Recall / physiology*
  • Neural Pathways / physiopathology
  • Neuropsychological Tests
  • Pattern Recognition, Visual / physiology
  • Postoperative Complications / physiopathology*
  • Psychosurgery*
  • Serial Learning / physiology
  • Temporal Lobe / physiopathology*
  • Temporal Lobe / surgery*
  • Verbal Learning / physiology*