Published in

American Association of Neurological Surgeons, Journal of Neurosurgery, 1(102), p. 169-173, 2005

DOI: 10.3171/jns.2005.102.1.0169

Links

Tools

Export citation

Search in Google Scholar

Discrepant findings for Wada test and functional magnetic resonance imaging with regard to language function: Use of electrocortical stimulation mapping to confirm results

This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Red circle
Preprint: archiving forbidden
Red circle
Postprint: archiving forbidden
Question mark in circle
Published version: policy unknown
Data provided by SHERPA/RoMEO

Abstract

✓ The Wada test is still considered the gold standard for determining the language-dominant hemisphere prior to brain surgery. The authors report on a 34-year-old right-handed woman whose Wada test results indicated that the right hemisphere was dominant for language. In contrast, functional magnetic resonance (fMR) imaging was indicative of bilaterally represented language functions. Activation in the left hemisphere demonstrated on fMR imaging was most pronounced in the Broca area. Importantly, fMR imaging results in this area were confirmed on electrocortical stimulation mapping. These contradictory findings indicated that a right hemispherre dominance for language according to the Wada test should be questioned and verified using electrocortical stimulation. Nonetheless, the question remains whether involvement of these areas in the left frontal hemisphere is critical for language, as these were spared during surgery.