Role of left inferior frontal gyrus in the processing of particles in Japanese

Neuroreport ◽  
2007 ◽  
Vol 18 (5) ◽  
pp. 431-434 ◽  
Author(s):  
Toshio Inui ◽  
Kenji Ogawa ◽  
Masato Ohba
Keyword(s):  
Inferior Frontal Gyrus ◽  
Left Inferior Frontal Gyrus

The role of the left inferior frontal gyrus in social perception: An rTMS study

2011 ◽  
Vol 1383 ◽  
pp. 196-205 ◽  
Author(s):  
M.C. Keuken ◽  
A. Hardie ◽  
B.T. Dorn ◽  
S. Dev ◽  
M.P. Paulus ◽  
...  
Keyword(s):  
Social Perception ◽  
Inferior Frontal Gyrus ◽  
Left Inferior Frontal Gyrus

scholarly journals The role of the left inferior frontal gyrus in implicit semantic competition and selection: An event-related fMRI study

2008 ◽  
Vol 1229 ◽  
pp. 167-178 ◽  
Author(s):  
Christopher M. Grindrod ◽  
Natalia Y. Bilenko ◽  
Emily B. Myers ◽  
Sheila E. Blumstein
Keyword(s):  
Inferior Frontal Gyrus ◽  
Left Inferior Frontal Gyrus ◽  
Semantic Competition ◽  
Fmri Study

Item Retrieval and Competition in Noun and Verb Generation: An fMRI Study

2010 ◽  
Vol 22 (6) ◽  
pp. 1140-1157 ◽  
Author(s):  
Cristiano Crescentini ◽  
Tim Shallice ◽  
Emiliano Macaluso
Keyword(s):  
Inferior Frontal Gyrus ◽  
Strong Association ◽  
Association Strength ◽  
Left Inferior Frontal Gyrus ◽  
Stimulus Response ◽  
Fmri Study ◽  
Current Task ◽  
Verb Generation ◽  
Competing Responses

Selection between competing responses and stimulus-response association strength is thought to affect performance during verb generation. However, the specific contribution of these two processes remains unclear. Here we used fMRI to investigate the role of selection and association within frontal and BG circuits that are known to be involved in verb production. Subjects were asked to generate verbs from nouns in conditions requiring either high or low selection, but with constant association strength, and in conditions of weak or strong association strength, now with constant selection demands. Furthermore, we examined the role of selection and association during noun generation from noun stimuli. We found that the midpart of the left inferior frontal gyrus was more active in conditions requiring high compared with low selection, with matched association strength. The same left inferior frontal region activated irrespective of verb or noun generation. Results of ROI analyses showed effects of association strength only for verb generation and specifically in the anterior/ventral part of the left inferior frontal gyrus. Moreover, the BG were more active when weakly associated verbs had to be produced relative to weakly associated nouns. These results highlight a functional segregation within the left inferior frontal gyrus for verb generation. More generally, the findings suggest that both factors of selection between competing responses and association strength are important during single-word production with the latter factor becoming particularly critical when task-irrelevant stimuli interfere with the current task (here nouns during verb production), triggering additional activation of the BG.

Effect of Language Switching on Arithmetic: A Bilingual fMRI Study

2006 ◽  
Vol 18 (1) ◽  
pp. 64-74 ◽  
Author(s):  
Vinod Venkatraman ◽  
Soon Chun Siong ◽  
Michael W. L. Chee ◽  
Daniel Ansari
Keyword(s):  
Inferior Frontal Gyrus ◽  
Angular Gyrus ◽  
Language Switching ◽  
Left Inferior Frontal Gyrus ◽  
Code Model ◽  
Fmri Study ◽  
Number Comparison ◽  
Addition Task ◽  
Approximate Percentage

The role of language in performing numerical computations has been a topic of special interest in cognition. The “Triple Code Model” proposes the existence of a language-dependent verbal code involved in retrieving arithmetic facts related to addition and multiplication, and a language-independent analog magnitude code subserving tasks such as number comparison and estimation. Neuroimaging studies have shown dissociation between dependence of arithmetic computations involving exact and approximate processing on language-related circuits. However, a direct manipulation of language using different arithmetic tasks is necessary to assess the role of language in forming arithmetic representations and in solving problems in different languages. In the present study, 20 English-Chinese bilinguals were trained in two unfamiliar arithmetic tasks in one language and scanned using fMRI on the same problems in both languages (English and Chinese). For the exact “base-7 addition” task, language switching effects were found in the left inferior frontal gyrus (LIFG) and left inferior parietal lobule extending to the angular gyrus. In the approximate “percentage estimation” task, language switching effects were found predominantly in the bilateral posterior intraparietal sulcus and LIFG, slightly dorsal to the LIFG activation seen for the base-7 addition task. These results considerably strengthen the notion that exact processing relies on verbal and language-related networks, whereas approximate processing engages parietal circuits typically involved in magnitude-related processing.

scholarly journals A systematic review and quantitative appraisal of fMRI studies of verbal fluency: Role of the left inferior frontal gyrus

2006 ◽  
Vol 27 (10) ◽  
pp. 799-810 ◽  
Author(s):  
Sergi G. Costafreda ◽  
Cynthia H.Y. Fu ◽  
Lucy Lee ◽  
Brian Everitt ◽  
Michael J. Brammer ◽  
...  
Keyword(s):  
Systematic Review ◽  
Verbal Fluency ◽  
Inferior Frontal Gyrus ◽  
Left Inferior Frontal Gyrus ◽  
Quantitative Appraisal
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