Related Experiment Videos
Hippocampal adequacy versus functional reserve: predicting memory functions following temporal lobectomy.
1Department of Psychiatry & Psychology, Cleveland Clinic Foundation, OH 44195, USA.
Summary
Identifying patients at risk for memory loss after temporal lobectomy is challenging. New research suggests memory decline is linked to the functional adequacy of the resected hippocampal tissue, not just reserve capacity.
Area of Science:
- Neuropsychology
- Neurosurgery
- Epilepsy Research
Background:
- Temporal lobectomy for intractable epilepsy can lead to significant memory deficits.
- Predicting which patients will experience post-surgical memory decline has been difficult.
- Existing models include hippocampal reserve and functional adequacy.
Purpose of the Study:
- To review and evaluate the functional adequacy model of hippocampal functioning.
- To contrast the functional adequacy model with the traditional hippocampal reserve model.
- To explore implications for predicting memory outcomes after epilepsy surgery.
Main Methods:
- Review of existing literature on hippocampal functioning and memory.
- Examination of data from baseline neuropsychological testing.
- Analysis of intracarotid amytal procedures, histologic cell densities, and MRI volumetrics.
Main Results:
- Convergent data support the functional adequacy model.
- Risk for memory decrements is inversely related to the functional adequacy of the resected tissue.
- The hippocampus's role in memory may require re-evaluation.
Conclusions:
- The functional adequacy of resected tissue is a key predictor of post-surgical memory function.
- This challenges traditional views of hippocampal reserve.
- Highlights the need for ongoing research and critical re-evaluation of concepts in neuropsychology.