scholarly journals Clustering and switching in verbal fluency: a comparison between control and individuals with brain damage

CoDAS ◽  
2022 ◽  
Vol 34 (2) ◽  
Author(s):  
Karina Carlesso Pagliarin ◽  
Eduarda Giovelli Fernandes ◽  
Maryndia Diehl Muller ◽  
Caroline Rodrigues Portalete ◽  
Rochele Paz Fonseca ◽  
...  
Keyword(s):  
Brain Damage ◽  
Left Hemisphere ◽  
Verbal Fluency ◽  
Right Hemisphere ◽  
Control Subjects ◽  
Right Hemisphere Damage ◽  
Unilateral Brain Damage ◽  
Healthy Control ◽  
Language Assessment Battery ◽  
Fluency Task

ABSTRACT Purpose The aim of this study is to analyze and compare the performance and strategies used by control subjects and patients with unilateral brain damage on phonemic and semantic Verbal Fluency tasks. Methods The sample consisted of 104 participants divided into four groups (26 with left hemisphere damage and aphasia- LHDa, 28 with left hemisphere damage and no aphasia- LHDna, 25 with right hemisphere damage- RHD and 25 neurologically healthy control subjects). All participants were administered the phonemic (“M” letter-based) and semantic (animals) verbal fluency tasks from the Montreal-Toulouse Language Assessment Battery (MTL-BR). Results Patients in the LHDa group showed the worst performance (fewer words produced, fewer clusters and switches) in both types of fluency task. RHD group showed fewer switching productions when compared with controls and LHDna had fewer words productions than controls in the first 30 seconds block. Conclusion Our findings suggest that the LHDa group obtained lower scores in most measures of SVF and PVF when compared to the other groups.

Investigating Musical Emotions in People with Unilateral Brain Damage

2021 ◽  
pp. 170-174
Author(s):  
Amy M. Belfi ◽  
Agathe Pralus ◽  
Catherine Hirel ◽  
Daniel Tranel ◽  
Barbara Tillmann ◽  
...  
Keyword(s):  
Brain Damage ◽  
Left Hemisphere ◽  
Right Hemisphere ◽  
Right Hemisphere Damage ◽  
Perceived Intensity ◽  
Unilateral Brain Damage ◽  
The Brain ◽  
Unilateral Brain ◽  
Emotions In Music

The study under discussion sought to investigate the hemispheric laterality of musical emotions: Is one hemisphere of the brain preferentially involved in recognizing emotions in music? The authors took a neuropsychological approach to answer this question by studying emotional judgments of music in people with brain damage to either hemisphere. Their results indicated that individuals with left hemisphere damage were significantly impaired in recognizing musical emotions as compared to healthy comparison participants. In contrast, individuals with right hemisphere damage were not impaired at identifying emotions in music, but rated the perceived intensity of the emotions lower for sadness and fear (as compared to joy and serenity). Their work suggests that the identification of emotions in music and the perceived intensity of the emotions expressed may rely on different hemispheres of the brain.

Evidence of altered dominance in children with congenital spastic hemiplegia

1995 ◽  
Vol 1 (3) ◽  
pp. 261-270 ◽  
Author(s):  
Marit Korkman ◽  
Lennart von Wendt
Keyword(s):  
Brain Damage ◽  
Left Hemisphere ◽  
Neuropsychological Tests ◽  
Right Hemisphere ◽  
Individual Variability ◽  
Right Hemisphere Damage ◽  
Spastic Hemiplegia ◽  
Ear Advantage ◽  
The Right ◽  
High Degree

AbstractThe study aimed at investigating lateralization effects and signs of transfer and crowding in children with congenital lateralized brain damage with the aid of a dichotic listening test, a chimeric test, and verbal and nonverbal neuropsychological tests. Thirty-three children with spastic hemiplegia and 86 control children (age 5.0–12.0 yr) were assessed. Children with left-hemisphere damage (n = 17) were found to have a pathological left-ear advantage for verbal material, and children with right-hemisphere damage (n = 16) were found to have a pathological right visual half-field advantage for visual material. Children with left-hemisphere damage and a left-ear advantage on the dichotic test were also found to have a right visual half-field advantage on the chimeric test, which was regarded as a sign of reversed dominance. No verbal or nonverbal differences emerged between the left-hemisphere and the right-hemisphere damage groups, nor did differences emerge when the children were reclassified by considering children with left-hemisphere damage and signs of reversed dominance as having damage to the nondominant hemisphere. It was concluded that although lateralized brain damage may alter the dominance for verbal and visual functions, there is still considerable inter-individual variability with respect to inter- and intrahemispheric neural adjustment to damage. The dichotic and the chimeric tests did not indicate the presence of brain damage accurately, but they indicated the lateralization of damage in children with stated abnormality with a high degree (91.3%) of accuracy. (JINS, 1995, I, 261–270.)

Phrase comprehension after brain damage

1982 ◽  
Vol 3 (3) ◽  
pp. 263-278 ◽  
Author(s):  
Rita Sloan Berndt ◽  
Alfonso Caramazza
Keyword(s):  
Brain Damage ◽  
Left Hemisphere ◽  
Language Comprehension ◽  
Right Hemisphere ◽  
The Other ◽  
Right Hemisphere Damage ◽  
Dimensional Adjectives ◽  
Neurologically Normal ◽  
The Right

ABSTRACTComprehension of six dimensional adjectives was found to be intact in groups of left hemisphere-damaged, right hemisphere-damaged and neurologically normal patients. Phrases with those adjectives were interpreted quite differently by left hemisphere-damaged patients than by the other two groups, and a subgroup of left-damaged patients appeared to be responsible for that group's deviant responses to phrases such as slightly bigger. All patients in the left-damaged group had some difficulty with negative phrases such as not big, however. Patients with right hemisphere-damage had difficulty interpreting only negative phrases with small. Results are interpreted with reference to Luria's discussion of semantic aphasia, and with regard to recent findings concerning the role of the right hemisphere in language comprehension.

Differential impairment in semantic, phonemic, and action fluency performance in Friedreich's ataxia: Possible evidence of prefrontal dysfunction

2007 ◽  
Vol 13 (6) ◽  
pp. 944-952 ◽  
Author(s):  
ÉRIKA DE NÓBREGA ◽  
ANTONIETA NIETO ◽  
JOSÉ BARROSO ◽  
FERNANDO MONTÓN
Keyword(s):  
Verbal Fluency ◽  
Semantic Fluency ◽  
Executive Processes ◽  
Control Subjects ◽  
Prefrontal Dysfunction ◽  
Strategic Processes ◽  
Healthy Control ◽  
And Control ◽  
Fluency Task ◽  
Unusual Type

This study examined phonemic (letters), semantic (animals) and action verbal fluency cues in twenty-four patients with FRDA, and twenty matched healthy control subjects. The Action Fluency Test (AFT) is a newly-developed verbal fluency cue that consists in asking the subject to rapidly generate verbs. Given the high presence of dysarthria and cognitive slowness in FRDA patients, control tasks were administered in order to dissociate motor/articulatory impairment and cognitive slowness from verbal fluency deficit. Results showed that patients and control subjects performed similarly on the semantic fluency task. In contrast, patients performed significantly poorer on phonemic and action fluency tests. Correlational analyses showed that the deficits cannot be attributed to dysarthria or cognitive slowness. Although executive processes are necessary for initiating and monitoring all verbal fluency tasks, phonemic and action fluency may place a greater burden on strategic processes, given that they require a more unusual type of lexicon search. Thus, the deficits found occur in tasks that require greater executive/prefrontal control. This impairment might be the result of an affectation of cerebellum-prefrontal cortex connections, although the possibility of a primary prefrontal dysfunction remains to be investigated. (JINS, 2007,13, 944–952.)

Recognition of Matching Tasks and Stimulus Novelty as a Function of Unilateral Brain Damage

1980 ◽  
Vol 51 (2) ◽  
pp. 407-418 ◽  
Author(s):  
William Paradowski ◽  
Herbert Zaretsky ◽  
Bernard Brucker ◽  
Augusta Alba
Keyword(s):  
Reaction Time ◽  
Brain Damage ◽  
Left Hemisphere ◽  
Right Hemisphere ◽  
Recognition Task ◽  
Control Group ◽  
Random Schedule ◽  
Unilateral Brain Damage ◽  
High Internal Consistency ◽  
Unilateral Brain

A 96-trial tachistoscope recognition task was given to 15 left-hemisphere-damaged, 12 right-hemisphere-damaged, and 30 non-brain-damaged subjects. Procedure called for a first stimulus presented for 250 msec. a 1-sec. pause, and a second stimulus for 250 msec. The stimuli were 12 animal drawings used in repeated series according to a random schedule. Six animals were familiar and six were novel. For half of the trials, the two pictures were of different animals. Size and position of the animal picture were controlled. Both reaction time and accuracy were independently scored. Judgments of same and different appear to function as if they are governed by different processes. For the control group, measures of same and different judgments do not correlate highly despite high internal consistency of subtests. Recognition of same becomes impaired with brain damage, but more so if the damage is rightsided. Recognition of different judgments shows considerably less sensitivity to the effects of unilateral brain damage.

The Access and Processing of Familiar Idioms by Brain-Damaged and Normally Aging Adults

1992 ◽  
Vol 35 (3) ◽  
pp. 626-637 ◽  
Author(s):  
Connie A. Tompkins ◽  
Richard Boada ◽  
Kathrine McGarry
Keyword(s):  
Brain Damage ◽  
Right Hemisphere ◽  
Poor Performance ◽  
Monitoring Task ◽  
Right Hemisphere Damage ◽  
Unilateral Brain Damage ◽  
Idiomatic Expressions ◽  
On Line ◽  
Aging Adults

Idiom interpretation tasks are routinely used in the clinical evaluation of adults with brain damage, and idiom processing has received increasing attention in the psycholinguistic literature. Clinical evidence suggests that adults with unilateral right-hemisphere damage (RHD) are insensitive to nonliteral meanings conveyed by idiomatic expressions and other figurative forms. However, this portrayal is derived from their terminal responses to tasks that reflect multiple aspects of mental operations (off-line measures), obscuring the source of poor performance. This study used an on-line word-monitoring task to assess RHD, left-hemisphere-damaged, and normally aging adults' implicit knowledge of familiar idiomatic expressions. Brain-damaged subjects performed similarly to normal controls on this task, even though the clinical subjects fared poorly by comparison on an off-line idiom definition measure. These results suggest that adults with unilateral brain damage can activate and retrieve familiar idiomatic forms, and that their idiom-interpretation deficits most likely reflect impairment at some later stage of information processing. Further, error analysis of idiom-definition performance did not support the customary characterization of RHD adults as excessively literal responders The paper discusses clinical implications of the nature and use of idiom interpretation tasks.

Verbal comprehension deficits after right hemisphere damage

1980 ◽  
Vol 1 (3) ◽  
pp. 279-294 ◽  
Author(s):  
Daniel B. Hier ◽  
Joni Kaplan
Keyword(s):  
Educational Attainment ◽  
Sentence Comprehension ◽  
Right Hemisphere ◽  
Vocabulary Test ◽  
Verbal Comprehension ◽  
Visuospatial Deficits ◽  
Control Subjects ◽  
Right Hemisphere Damage ◽  
The Right ◽  
Grammatical Sentence

ABSTRACTWe have compared the verbal comprehension abilities of 34 right hemisphere damaged patients to 16 hospitalized control subjects of comparable age and educational attainment. The right hemisphere damaged patients performed as well as the control subjects on a vocabulary test, but were impaired in their ability to interpret proverbs and comprehend logico-grammatical sentences. Impairment on the proverbs test was the result of a decrease in the number of abstract interpretations, whereas impairment on the logico-grammatical sentence comprehension test was related to difficultes in grasping spatial and passive relationships. These comprehension impairments tended to correlate with visuospatial deficits and hemianopia, but not with the degree of hemiparesis or the presence of sensory extinction. Patients with anterior right hemisphere damage performed better on the logico-grammatical sentence conprehension test than patients with posterior damage. A variety of factors probably contribute to these verbal deficits including impaired intellect, inattention, an inability to grasp spatial relationships, and difficulties in manipulating the inner schemata of language.

scholarly journals An analysis of verbal fluency task performance profiles in patients with vascular brain pathology

2021 ◽  
Vol 21 (1) ◽  
pp. 15-26
Author(s):  
Ewa Małgorzata Szepietowska ◽  
◽  
Anna Kuzaka ◽  
Keyword(s):  
Task Performance ◽  
Left Hemisphere ◽  
Verbal Fluency ◽  
Right Hemisphere ◽  
Vascular Pathology ◽  
Brain Pathology ◽  
Healthy Individuals ◽  
Central Nervous System Damage ◽  
Performance Profiles ◽  
Right Hemisphere Stroke

Aim: Considering the data on the important role of verbal fluency tasks in neuropsychological diagnosis and the models of hemispherically specialised modulation of processes essential for different types of verbal fluency, we made an attempt to identify differences in correct and incorrect performance of 5 verbal fluency tasks between patients with vascular cerebral pathology, including hypertension, and healthy individuals. We also analysed task performance profiles within the groups. Materials and methods: The study included healthy volunteers (n = 36), hypertensive individuals (n = 33), and patients after left (n = 15) or right hemisphere stroke (n = 30) – 114 subjects in total. We used the Frenchay Aphasia Screening Test (FAST) to exclude patients with significant language difficulties/aphasia. We used 5 verbal fluency tasks: semantic (Animals), phonemic (“k”), verb fluency and two emotional tasks: Joy and Fear. We used general linear models for repeated measures for the analysis of correctly and incorrectly performed tasks. Results: The profiles of correct responses for all 5 tasks were similar in all groups, with quantitative intergroup differences. The highest number of correct responses appeared in the semantic, phonemic and verb fluency tasks, whereas the lowest number in the emotional tasks. Hypertensive individuals scored statistically insignificantly lower than healthy individuals, whereas patients after right/left hemisphere stroke scored significantly lower compared to both these groups. Despite a large number of errors, healthy individuals had the highest scores. Patients after right hemisphere stroke showed little differentiation in the number of correct responses in subsequent tasks. There were no intergroup differences in the level of performance of emotional tasks with different valences (positive and negative). Healthy and hypertensive individuals were characterised by a distinct heterogeneity of correct and incorrect responses in various tasks. Patients with brain pathology, regardless of its lateralisation, performed these tasks at a similar level, with left hemisphere damage resulting in the highest number of errors, mainly in semantic and phonemic tasks, and with right hemisphere pathology associated with errors in all types of tasks. The difficulties in patients with left hemisphere damage may result from weaker phonological and lexical processes, including access to semantic features of a word, while the low scores of patients with right hemisphere damage may be a consequence of impaired attention and executive processes. Conclusions: Patients with vascular pathology of the brain hemispheres achieved significantly lower scores in all types of fluency, while hypertensive individuals scored insignificantly lower than healthy subjects. This means that the method can be useful in differentiating between healthy individuals and patients with central nervous system damage, as well as those at risk. Future research should focus on a detailed analysis of the types of errors made by patients with hemispheric damage in various types of verbal fluency tasks. An analysis of the location of the pathology in the anterior-posterior dimension of each hemisphere could reveal specific features of verbal fluency.

Verbal and design fluency in patients with frontal lobe lesions

2001 ◽  
Vol 7 (5) ◽  
pp. 586-596 ◽  
Author(s):  
JULIANA V. BALDO ◽  
ARTHUR P. SHIMAMURA ◽  
DEAN C. DELIS ◽  
JOEL KRAMER ◽  
EDITH KAPLAN
Keyword(s):  
Frontal Cortex ◽  
Frontal Lobe ◽  
Verbal Fluency ◽  
Right Hemisphere ◽  
Verbal Fluency Task ◽  
Frontal Lobe Lesions ◽  
Design Fluency ◽  
The Right ◽  
Frontal Lesions ◽  
Fluency Task

The ability to generate items belonging to categories in verbal fluency tasks has been attributed to frontal cortex. Nonverbal fluency (e.g., design fluency) has been assessed separately and found to rely on the right hemisphere or right frontal cortex. The current study assessed both verbal and nonverbal fluency in a single group of patients with focal, frontal lobe lesions and age- and education-matched control participants. In the verbal fluency task, participants generated items belonging to both letter cues (F, A, and S) and category cues (animals and boys' names). In the design fluency task, participants generated novel designs by connecting dot arrays with 4 straight lines. A switching condition was included in both verbal and design fluency tasks and required participants to switch back and forth between different sets (e.g., between naming fruits and furniture). As a group, patients with frontal lobe lesions were impaired, compared to control participants, on both verbal and design fluency tasks. Patients with left frontal lesions performed worse than patients with right frontal lesions on the verbal fluency task, but the 2 groups performed comparably on the design fluency task. Both patients and control participants were impacted similarly by the switching conditions. These results suggest that verbal fluency is more dependent on left frontal cortex, while nonverbal fluency tasks, such as design fluency, recruit both right and left frontal processes. (JINS, 2001, 7, 586–596.)

scholarly journals Visuospatial Attention and the Split Brain

Physiology ◽  
1997 ◽  
Vol 12 (5) ◽  
pp. 226-231
Author(s):  
G Berlucchi ◽  
GR Mangun ◽  
MS Gazzaniga
Keyword(s):  
Visual Field ◽  
Left Hemisphere ◽  
Right Hemisphere ◽  
Visuospatial Attention ◽  
Attentional Biases ◽  
Split Brain ◽  
Right Hemisphere Damage ◽  
Entire Visual Field ◽  
The Right

In callosotomy patients, the right hemisphere attends to the entire visual field, whereas the left hemisphere attends to the right field only. The occurence of rightward attentional biases, simulating a hemineglect from right hemisphere damage, suggests that in these patients visuospatial attention tends to be controlled by the left hemisphere.

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