Category-specific cortical mapping: color-naming areas

2006 ◽  
Vol 104 (1) ◽  
pp. 27-37 ◽  
Author(s):  
Franck-Emmanuel Roux ◽  
Vincent Lubrano ◽  
Valérie Lauwers-Cances ◽  
Christopher R. Mascott ◽  
Jean-François Démonet
Keyword(s):  
Electrical Stimulation ◽  
Naming Task ◽  
Color Naming ◽  
Individual Variability ◽  
Cortical Mapping ◽  
Object Naming ◽  
Cortical Areas ◽  
Language Deficit ◽  
Language Areas ◽  
Naming Tasks

Object It has been hypothesized that a certain degree of specialization exists within language areas, depending on some specific lexical repertories or categories. To spare hypothetical category-specific cortical areas and to gain a better understanding of their organization, the authors studied patients who had undergone electrical stimulation mapping for brain tumors and they compared an object-naming task with a category-specific task (color naming). Methods Thirty-six patients with no significant preoperative language deficit were prospectively studied during a 2-year period. Along with a reading task, both object- and color-naming tasks were used in brain mapping. During color naming, patients were asked to identify 11 visually presented basic colors. The modality specificity of the colornaming sites found was subsequently tested by asking patients to retrieve the color attributes of objects. High individual variability was observed in language organization among patients and in the tasks performed. Significant interferences in color naming were found in traditional language regions—that is, Broca (p < 0.003) and Wernicke centers (p = 0.05)—although some color-naming areas were occasionally situated outside of these regions. Color-naming interferences were exclusively localized in small cortical areas (< 1 cm2). Anatomical segregation of the different naming categories was apparent in 10 patients; in all, 13 color-specific naming areas (that is, sites evoking no object-naming interference) were detected in the dominant-hemisphere F3 and the supramarginal, angular, and posterior parts of the temporal gyri. Nevertheless, no specific brain region was found to be consistently involved in color naming (p > 0.05). At five sites, although visually presented color-naming tasks were impaired by stimulation, auditory color naming (for example, “What color is grass?”) was performed with no difficulty, showing that modality-specific areas can be found during naming. Conclusions Within language areas, a relative specialization of cortical language areas for color naming can be found during electrical stimulation mapping.

scholarly journals A Data-Based Approach for Selecting Pre- and Intra-Operative Language Mapping Tasks

2021 ◽  
Vol 15 ◽  
Author(s):  
Justyna O. Ekert ◽  
Matthew A. Kirkman ◽  
Mohamed L. Seghier ◽  
David W. Green ◽  
Cathy J. Price
Keyword(s):  
Naming Task ◽  
Object Naming ◽  
Auditory Modality ◽  
Language Mapping ◽  
Novel Approach ◽  
Brain Responses ◽  
Linguistic Functions ◽  
Classical Language ◽  
Language Areas ◽  
Naming Tasks

Background: Pre- and intra-operative language mapping in neurosurgery patients frequently involves an object naming task. The choice of the optimal object naming paradigm remains challenging due to lack of normative data and standardization in mapping practices. The aim of this study was to identify object naming paradigms that robustly and consistently activate classical language regions and could therefore be used to improve the sensitivity of language mapping in brain tumor and epilepsy patients.Methods: Functional magnetic resonance imaging (fMRI) data from two independent groups of healthy controls (total = 79) were used to generate threshold-weighted voxel-based consistency maps. This novel approach allowed us to compare inter-subject consistency of activation for naming single objects in the visual and auditory modality and naming two objects in a phrase or a sentence.Results: We found that the consistency of activation in language regions was greater for naming two objects per picture than one object per picture, even when controlling for the number of names produced in 5 s.Conclusion: More consistent activation in language areas for naming two objects compared to one object suggests that two-object naming tasks may be more suitable for delimiting language eloquent regions with pre- and intra-operative language testing. More broadly, we propose that the functional specificity of brain mapping paradigms for a whole range of different linguistic and non-linguistic functions could be enhanced by referring to databased models of inter-subject consistency and variability in typical and atypical brain responses.

Organization of language areas in bilingual patients: a cortical stimulation study

2002 ◽  
Vol 97 (4) ◽  
pp. 857-864 ◽  
Author(s):  
Franck-Emmanuel Roux ◽  
Michel Trémoulet
Keyword(s):  
Language Proficiency ◽  
Word Retrieval ◽  
Cortical Mapping ◽  
Content Type ◽  
Cortical Areas ◽  
Language Deficit ◽  
Language Studies ◽  
Language Difficulties ◽  
Language Areas ◽  
Fine Print

Object. In an attempt to gain a better understanding of how multiple languages are represented in the human brain, the authors studied bilingual patients who underwent surgery for brain tumors, during which the authors mapped cortical language sites by using electrostimulation. Methods. Reading, counting, and word retrieval tasks were studied in 12 right-handed bilingual patients with no language deficit. All bilingual patients were native to France. One patient spoke four languages. The patients constituted a nonhomogeneous group in terms of language proficiency or age of acquisition. Languages were evaluated and classified into three major groups, depending on proficiency and date of acquisition. Strict conditions of language site validation were applied, separating typical anomia sites from speech arrest or other language sites (such as hesitation sites). A total of 30 speech arrest sites, 16 anomia sites, and three sites of language difficulties (not typically classified as speech arrest) were found throughout the 26 language studies performed. Strict overlapping of language areas (for all language tasks) was found in five patients, whereas the remaining seven had at least one area that was language-specific and sometimes task-specific. Specific areas for a particular language were found for word retrieval tasks (anomia) in eight sites (50%) but also in six (20%) of the reading or counting sites (speech arrest), either in frontal (three patients) or in temporoparietal (four patients) regions. Among the four early bilingual patients tested (languages acquired before the age of 7 years), three had language-specific cortical areas. Interestingly, six patients in this series who had a discrepancy between two languages did not have more cortical areas devoted to the less proficient language (with acknowledgment of the limit in cortical exposure available for testing by the craniotomy). Conclusions. In this series, the authors found that bilingual patients could have common but also different cortical areas for both languages in temporoparietal areas and in frontal areas. In some cases, the authors found that language tasks such as counting, reading, or word retrieval in different languages can be sustained by language- and task-specific cortical areas. In bilingual patients, cortical mapping should ideally be performed using different language tasks in all languages in which the patient is fluent.

Writing, calculating, and finger recognition in the region of the angular gyrus: a cortical stimulation study of Gerstmann syndrome

2003 ◽  
Vol 99 (4) ◽  
pp. 716-727 ◽  
Author(s):  
Franck-Emmanuel Roux ◽  
Sergio Boetto ◽  
Oumar Sacko ◽  
François Chollet ◽  
Michel Trémoulet
Keyword(s):  
Brain Mapping ◽  
Right Hemisphere ◽  
Color Naming ◽  
Angular Gyrus ◽  
Cortical Mapping ◽  
Object Naming ◽  
Content Type ◽  
Finger Recognition ◽  
Naming Tasks ◽  
Fine Print

Object. In an attempt to gain a better understanding of the cerebral functions represented in the angular gyrus and to spare them during surgery, the authors studied patients with brain tumors located close to the angular gyrus and mapped cortical sites by using electrostimulation. Methods. Before undergoing tumor removal, six right-handed patients (five with left and one with right hemisphere tumors) were studied using cortical mapping with the aid of calculating, writing, finger-recognition, and color-naming tasks in addition to standard reading and object-naming tasks (for a total of 36 brain mapping studies). Strict conditions of functional site validation were applied to include only those cortical sites that produced repetitive interferences in the function tested. Preoperatively, four of the patients exhibited discrete symptoms related to Gerstmann syndrome while performing very specific tasks, whereas the other two patients presented with no symptoms of the syndrome. No patient had significant language or apraxic deficits. Distinct or shared cortical sites producing interferences in calculating, finger recognition, and writing were repeatedly found in the angular gyrus. Object- or color-naming sites and reading-interference sites were also found in or close to the angular gyrus; although frequently demonstrated, these latter results were variable and unpredictable in the group of patients studied. Finger agnosia and acalculia sites were also found elsewhere, such as in the supramarginal gyrus or close to the intraparietal sulcus. Mechanisms involved in acalculia, agraphia, or finger agnosia (either complete interferences or hesitations) during stimulation were various, from an aphasia-like form (for instance, the patient did not understand the numbers or words given for calculating or writing tasks) to an apparently pure interference in the function tested (patients understood the numbers, but were unable to perform a simple addition). Conclusions. Symptoms of Gerstmann syndrome can be found during direct brain mapping in the angular gyrus region. In this series of patients, sites producing interferences in writing, calculating, and finger recognition were demonstrated in the angular gyrus, which may or may not have been associated with object-naming, color-naming, or reading sites.

“The Mute Who Can Sing”: a cortical stimulation study on singing

2009 ◽  
Vol 110 (2) ◽  
pp. 282-288 ◽  
Author(s):  
Franck-Emmanuel Roux ◽  
Stefano Borsa ◽  
Jean-François Démonet
Keyword(s):  
Brain Tumors ◽  
Special Interest ◽  
Clear Distinction ◽  
Awake Surgery ◽  
Cortical Mapping ◽  
Cortical Areas ◽  
Left Handed ◽  
Surgical Data ◽  
The Right ◽  
Language Areas

Object In an attempt to identify cortical areas involved in singing in addition to language areas, the authors used a singing task during direct cortical mapping in 5 patients who were amateur singers and had undergone surgery for brain tumors. The organization of the cortical areas involved in language and singing was analyzed in relation with these surgical data. Methods One left-handed and 4 right-handed patients with brain tumors in left (2 cases) and right (3 cases) hemispheres and no significant language or singing deficits underwent surgery with the “awake surgery” technique. All patients had a special interest in singing and were involved in amateur singing activities. They were tested using naming, reading, and singing tasks. Results Outside primary sensorimotor areas, singing interferences were rare and were exclusively localized in small cortical areas (< 1 cm2). A clear distinction was found between speech and singing in the Broca region. In the Broca region, no singing interference was found in areas in which interference in naming and reading tasks were detected. Conversely, a specific singing interference was found in nondominant middle frontal gyri in one patient. This interference consisted of abrupt singing arrest without apparent face, mouth, and tongue contraction. Finally, nonspecific singing interferences were found in the right and left precentral gyri in all patients (probably by interference in final articulatory mechanisms of singing). Conclusions Dissociations between speech and singing found outside primary sensorimotor areas showed that these 2 functions use, in some cortical stages, different cerebral pathways.

Who is who: areas of the brain associated with recognizing and naming famous faces

2009 ◽  
Vol 110 (2) ◽  
pp. 289-299 ◽  
Author(s):  
Carlo Giussani ◽  
Franck-Emmanuel Roux ◽  
Lorenzo Bello ◽  
Valérie Lauwers-Cances ◽  
Costanza Papagno ◽  
...  
Keyword(s):  
Brain Tumors ◽  
Right Hemisphere ◽  
Anterior Part ◽  
Final Analysis ◽  
Naming Task ◽  
Brain Regions ◽  
Object Naming ◽  
Language Deficit ◽  
Neurosurgical Patients ◽  
The Brain

Object It has been hypothesized that specific brain regions involved in face naming may exist in the brain. To spare these areas and to gain a better understanding of their organization, the authors studied patients who underwent surgery by using direct electrical stimulation mapping for brain tumors, and they compared an object-naming task to a famous face–naming task. Methods Fifty-six patients with brain tumors (39 and 17 in the left and right hemispheres, respectively) and with no significant preoperative overall language deficit were prospectively studied over a 2-year period. Four patients who had a partially selective famous face anomia and 2 with prosopagnosia were not included in the final analysis. Results Face-naming interferences were exclusively localized in small cortical areas (< 1 cm2). Among 35 patients whose dominant left hemisphere was studied, 26 face-naming specific areas (that is, sites of interference in face naming only and not in object naming) were found. These face naming–specific sites were significantly detected in 2 regions: in the left frontal areas of the superior, middle, and inferior frontal gyri (p < 0.001) and in the anterior part of the superior and middle temporal gyri (p < 0.01). Variable patterns of interference were observed (speech arrest, anomia, phonemic, or semantic paraphasia) probably related to the different stages in famous face processing. Only 4 famous face–naming interferences were found in the right hemisphere. Conclusions Relative anatomical segregation of naming categories within language areas was detected. This study showed that famous face naming was preferentially processed in the left frontal and anterior temporal gyri. The authors think it is necessary to adapt naming tasks in neurosurgical patients to the brain region studied.

Cortical calculation localization using electrostimulation

2009 ◽  
Vol 110 (6) ◽  
pp. 1291-1299 ◽  
Author(s):  
Franck-Emmanuel Roux ◽  
Leila Boukhatem ◽  
Louisa Draper ◽  
Oumar Sacko ◽  
Jean-François Démonet
Keyword(s):  
Brain Mapping ◽  
Parietal Lobe ◽  
Naming Task ◽  
Brain Lesions ◽  
Awake Surgery ◽  
Mapping Procedure ◽  
Cortical Areas ◽  
Surgical Data ◽  
Calculation Task ◽  
Language Areas

Object A naming task has been used to spare cortical areas involved in language. In the present study, a calculation task was combined with electrostimulation mapping (awake surgery) to spare cortical areas involved in calculation in patients undergoing surgery for brain lesions. The organization of language and calculation areas was analyzed in relation to these surgical data. Methods Twenty patients with brain lesions close to areas possibly involved in calculation (dominant parietal lobe and F2) were prospectively studied over a 4-year period. Four patients had preoperative symptoms of acalculia and therefore were not included in the brain mapping procedure. Results In 16 patients, direct electrostimulation caused calculation interferences in localized small cortical areas (< 2 cm2). Of the 53 calculation interferences found, 23 were independent of language areas, especially those in the inferior left parietal lobule. Various patterns of interference were observed (11 complete acalculia, 5 acalculia with wrong answers, 2 hesitations, and 5 mixed responses), although error patterns were fairly similar across angular, parietal, and frontal stimulation sites. Calculation areas in 4 patients could not be spared for oncological reasons; postoperatively, 3 of these patients showed significant acalculia symptoms. In contrast, none of the patients whose calculation areas were spared had arithmetic difficulties 1 month after surgery. Improvements in acalculia symptoms after surgery were also found in 3 of the 4 patients with preoperative calculation difficulties. Conclusions To limit the risk of personal and professional disturbances caused by acquired anarithmetia in patients undergoing surgery for brain tumors or epilepsy, the authors think it is necessary to use a calculation task during brain mapping, especially when operating in the dominant parietal lobe.

Context sensitivity and insensitivity in object naming

2013 ◽  
Vol 5 (1) ◽  
pp. 81-97 ◽  
Author(s):  
Barbara C. Malt
Keyword(s):  
Naming Task ◽  
Target Object ◽  
Context Sensitivity ◽  
The Other ◽  
Object Naming ◽  
Large Set ◽  
Small Set ◽  
Naming Tasks

AbstractObjects can almost always be called by more than one name, and the name chosen depends on the context. However, studies of naming in some traditions elicit names by showing objects in isolation and asking merely What is it? If the names produced are not the same as those that would be given in more fully specified communicative contexts, the value of the tasks for understanding object naming is in doubt. The current study examined the effects of different communicative demands on naming of 60 household containers. A standard “free naming” task was contrasted with two other versions. In these two, participants had the goal of getting an addressee to find a target object among others. In one, each object needed to be distinguished from a small set of dissimilar objects, visible to the addressee. In the other, each needed to be distinguished from a large set of similar objects, not visible to the addressee. Responses were sensitive to context in the number of modifiers produced. However, they were insensitive in the head nouns produced. Simple naming tasks such as What is it? can produce results for head nouns equivalent to those from tasks providing more fully specified communicative contexts.

Multidimensional Anxiety and Content-specificity Effects in Preferential Processing of Threat

2003 ◽  
Vol 8 (4) ◽  
pp. 252-265 ◽  
Author(s):  
Manuel G. Calvo ◽  
P. Avero ◽  
M. Dolores Castillo ◽  
Juan J. Miguel-Tobal
Keyword(s):  
Selective Attention ◽  
Cognitive Biases ◽  
Naming Task ◽  
Color Naming ◽  
Memory Bias ◽  
Ego Threat ◽  
Phobic Anxiety ◽  
Relative Contribution ◽  
Content Specificity ◽  
Specificity Effects

We examined the relative contribution of specific components of multidimensional anxiety to cognitive biases in the processing of threat-related information in three experiments. Attentional bias was assessed by the emotional Stroop word color-naming task, interpretative bias by an on-line inference processing task, and explicit memory bias by sensitivity (d') and response criterion (β) from word-recognition scores. Multiple regression analyses revealed, first, that phobic anxiety and evaluative anxiety predicted selective attention to physical- and ego-threat information, respectively; cognitive anxiety predicted selective attention to both types of threat. Second, phobic anxiety predicted inhibition of inferences related to physically threatening outcomes of ambiguous situations. And, third, evaluative anxiety predicted a response bias, rather than a genuine memory bias, in the reporting of presented and nonpresented ego-threat information. Other anxiety components, such as motor and physiological anxiety, or interpersonal and daily-routines anxiety made no specific contribution to any cognitive bias. Multidimensional anxiety measures are useful for detecting content-specificity effects in cognitive biases.

A Unique Asymmetrical Stroop Effect in Absolute Pitch Possessors

2012 ◽  
Vol 59 (5) ◽  
pp. 272-278 ◽  
Author(s):  
Lilach Akiva-Kabiri ◽  
Avishai Henik
Keyword(s):  
Selective Attention ◽  
Stroop Task ◽  
Stroop Effect ◽  
Congruency Effect ◽  
Absolute Pitch ◽  
Naming Task ◽  
Color Naming ◽  
Reading Task ◽  
Pitch Processing ◽  
Reverse Pattern

The Stroop task has been employed to study automaticity or failures of selective attention for many years. The effect is known to be asymmetrical, with words affecting color naming but not vice versa. In the current work two auditory-visual Stroop-like tasks were devised in order to study the automaticity of pitch processing in both absolute pitch (AP) possessors and musically trained controls without AP (nAP). In the tone naming task, participants were asked to name the auditory tone while ignoring a visual note name. In the note naming task, participants were asked to read a note name while ignoring the auditory tone. The nAP group showed a significant congruency effect only in the tone naming task, whereas AP possessors showed the reverse pattern, with a significant congruency effect only in the note reading task. Thus, AP possessors were unable to ignore the auditory tone when asked to read the note, but were unaffected by the verbal note name when asked to label the auditory tone. The results suggest that pitch identification in participants endowed with AP ability is automatic and impossible to suppress.

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