ERIC Number: EJ971945
Record Type: Journal
Publication Date: 2012-Jun
Pages: 5
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0028-3932
EISSN: N/A
Differential Prefrontal and Frontotemporal Oxygenation Patterns during Phonemic and Semantic Verbal Fluency
Tupak, Sara V.; Badewien, Meike; Dresler, Thomas; Hahn, Tim; Ernst, Lena H.; Herrmann, Martin J.; Fallgatter, Andreas J.; Ehlis, Ann-Christine
Neuropsychologia, v50 n7 p1565-1569 Jun 2012
Movement artifacts are still considered a problematic issue for imaging research on overt language production. This motion-sensitivity can be overcome by functional near-infrared spectroscopy (fNIRS). In the present study, 50 healthy subjects performed a combined phonemic and semantic overt verbal fluency task while frontal and temporal cortex oxygenation was recorded using multi-channel fNIRS. Results showed a partial dissociation for phonemic and semantic word generation with equally increased oxygenation in frontotemporal cortices for both types of tasks whereas anterior and superior prefrontal areas were exclusively activated during phonemic fluency. Also, a general left-lateralization was found being more pronounced during semantic processing. These findings line up with earlier imaging and lesion studies emphasizing a crucial role of the temporal lobe for semantic word production, whereas phonemic processing seems to depend on intact frontal lobe function. (Contains 2 figures.)
Descriptors: Brain Hemisphere Functions, Phonemics, Semantics, Verbal Ability, Language Fluency, Diagnostic Tests, Language Processing, Spectroscopy, Task Analysis, Physiology, Lateral Dominance, Role, Vocabulary
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A