Related Experiment Videos
Verbal and nonverbal fluency performance before and after seizure surgery
Yana Suchy1, Kristen Sands, Gordon J Chelune
1Cleveland DVA, Cleveland, OH, USA. yana.suchy@psych.utah.edu
Journal of Clinical and Experimental Neuropsychology
|May 20, 2003
Summary
The Ruff Figural Fluency Test (RFFT) better identifies frontal vs. temporal epilepsy seizure foci than the verbal FAS test. Both tests show continued seizures negatively impact cognitive outcomes post-surgery.
Area of Science:
- Neuropsychology
- Epileptology
- Neurosurgery
Background:
- Intractable epilepsy often necessitates surgical intervention.
- Neuropsychological assessments are crucial for evaluating cognitive deficits before and after epilepsy surgery.
- Distinguishing between frontal and temporal lobe epilepsy is critical for surgical planning and outcome prediction.
Purpose of the Study:
- To evaluate the utility of the verbal (FAS) and nonverbal (Ruff Figural Fluency Test: RFFT) fluency tests in detecting deficits related to focal seizures and surgical interventions.
- To compare the effectiveness of FAS and RFFT in differentiating between frontal and temporal lobe seizure foci.
- To assess the role of these tests in predicting neurocognitive outcomes following epilepsy surgery.
Main Methods:
- A cohort of 174 adult patients with intractable epilepsy undergoing surgery (152 temporal lobectomies, 22 frontal lobectomies) was studied.
- Patients completed both the verbal FAS and nonverbal RFFT tests.
- Neurocognitive outcomes were assessed, considering seizure foci and postsurgical seizure control.
Main Results:
- The RFFT demonstrated superiority over FAS in discriminating between frontal and temporal seizure foci.
- FAS was more effective in detecting neurocognitive changes associated with the surgical side (left vs. right).
- Continued postoperative seizures negatively impacted performance on both FAS and RFFT, irrespective of the surgical site.
Conclusions:
- The RFFT is a valuable tool for preoperative neuropsychological assessment in epilepsy surgery, particularly for lateralizing seizure foci.
- The FAS test is useful for monitoring neurocognitive changes related to the side of surgical intervention.
- Postoperative seizure control is a significant factor influencing cognitive outcomes, underscoring the importance of surgical success for neuropsychological recovery.