Cortical stimulation mapping of language cortex by using a verb generation task: effects of learning and comparison to mapping based on object naming.

Abstract:

OBJECT:Cortical stimulation mapping has traditionally relied on disruption of object naming to define essential language areas. In this study, the authors reviewed the use of a different language task, verb generation, in mapping language. This task has greater use in brain imaging studies and may be used to test aspects of language different from those of object naming. METHODS:In 14 patients, cortical stimulation mapping performed using a verb generation task provided a map of language areas in the frontal and temporoparietal cortices. These verb generation maps often overlapped object naming ones and, in many patients, different areas of cortex were found to be involved in the two functions. In three patients, stimulation mapping was performed during the initial performance of the verb generation task and also during learned performance of the task. Parallel to findings of published neuroimaging studies, a larger area of stimulated cortex led to disruption of verb generation in response to stimulation during novel task performance than during learned performance. CONCLUSIONS:Results of cortical stimulation mapping closely resemble those of functional neuroimaging when both implement the verb generation task. The precise map of the temporoparietal language cortex depends on the task used for mapping.

journal_name

J Neurosurg

journal_title

Journal of neurosurgery

authors

Ojemann JG,Ojemann GA,Lettich E

doi

10.3171/jns.2002.97.1.0033

subject

Has Abstract

pub_date

2002-07-01 00:00:00

pages

33-8

issue

1

eissn

0022-3085

issn

1933-0693

journal_volume

97

pub_type

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