Do dichotic word listening asymmetries predict side of temporal lobe seizure onset?

Abstract:

:Dichotic word listening asymmetries are thought to be useful in predicting side of temporal lobe dysfunction. However, little direct evidence exists to support this assumption in practice, especially in patients with subtle epileptogenic lesions. To determine if word listening ear asymmetries are valid predictors of side of temporal lobe seizure onset, we examined the preoperative dichotic word listening performance of 80 patients with either left (N = 41) or right (N = 39) temporal lobe (TL) seizure foci. On a group level, patients showed a statistically significant 'lesion effect' as evidenced by a relative deficit in the ear contralateral to the side of lesion. Prediction of side of seizure focus in individual cases, however, was poor: depending upon the criteria used, 61% to 80% of epileptics with unilateral temporal lobe foci did not show the expected contralateral ear deficit. Results suggest that caution be exercised when inferring side of temporal lobe seizure focus through dichotic word listening asymmetries in individual temporal lobe epilepsy cases.

journal_name

Epilepsy Res

journal_title

Epilepsy research

authors

Lee GP,Loring DW,Varney NR,Roberts RJ,Newell JR,Martin JA,Smith JR,King DW,Meador KJ,Murro AM

doi

10.1016/0920-1211(94)90025-6

subject

Has Abstract

pub_date

1994-10-01 00:00:00

pages

153-60

issue

2

eissn

0920-1211

issn

1872-6844

pii

0920-1211(94)90025-6

journal_volume

19

pub_type

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