Pervasive influence of semantics in letter and category fluency: A multidimensional approach

Schwartz, Sophie; Baldo, Juliana V.; Graves, Roger E.; Brugger, Peter

doi:10.1016/s0093-934x(03)00141-x

Cited by 77 publications

(75 citation statements)

References 66 publications

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“…The verbal fluency tasks activate overlapping areas of the frontal brain regions, but different word retrieval criteria likely activate additional distinct regions 16 . Executive dysfunction is the predominant profile of cognitive impairment in patients with PD, and phonemic fluency may be a good type of verbal fluency task to evaluate this population because the executive deficit is associated with frontal-lobe dysfunction 17 . Furthermore, PD may be a good neural model to study the principles of subcortical lexical processing, and studies in different cultural settings may enrich the theoretical framework about this issue as well.…”

Section: Subthalamic Nucleus Deep Brain Stimulation (Stn-dbs)mentioning

confidence: 99%

Different outcomes of phonemic verbal fluency in Parkinson’s disease patients with subthalamic nucleus deep brain stimulation

Romann

Beber

Olchik

et al. 2017

Arq. Neuro-Psiquiatr.

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Subthalamic nucleus deep brain stimulation (STN-DBS) is a surgical technique to treat motor symptoms in patients withParkinson's disease (PD). Studies have shown that STN-DBS may cause a decline in verbal fluency performance. We aimed to verify the effects of STN-DBS on the performance of phonemic verbal fluency in Brazilian PD patients. Sixteen participants were evaluated on the Unified Parkinson's Disease Rating Scale -Part III and for phonemic fluency ("FAS" version) in the conditions of on-and off-stimulation. We identified two different patterns of phonemic verbal fluency outcomes. The results indicate that there may be no expected pattern of effect of bilateral STN-DBS in the phonemic fluency, and patients may present with different outcomes for some reason not well understood.Keywords: Parkinson disease; deep brain stimulation; language; cognition. RESUMOA estimulação cerebral profunda do núcleo subtalâmico (ECP-NST) é uma técnica cirúrgica para tratar sintomas motores na doença de Parkinson (DP). Estudos têm mostrado que ECP-NST pode causar um declínio no desempenho de fluência verbal. O objetivo do estudo foi verificar os efeitos da ECP-NST sobre o desempenho da fluência verbal fonêmica em indivíduos brasileiros com DP. Dezesseis participantes foram avaliados quanto ao desempenho motor (UPDRS-III) e à fluência verbal fonêmica (versão "FAS") nas condições de estimulação ligada e desligada. Identificamos dois padrões diferentes de resultados de fluência verbal fonêmica. Os resultados indicam que pode não haver um padrão esperado de efeito de ECP-NST bilateral na fluência fonêmica, e os pacientes podem apresentar desfechos diferentes de acordo com alguma razão não bem compreendida.Palavras-chave: doença de Parkinson; estimulação encefálica profunda; linguagem; cognição. Subthalamic nucleus deep brain stimulation (STN-DBS)is a procedure used to treat patients with Parkinson's disease (PD) when pharmacological treatment is no longer efficient 1 . It has been proven that DBS suppresses motor symptoms and reduces the total dose of the antiparkinsonian drugs 2,3 . Among the adverse effects of STN-DBS in patients with PD, the postoperative decline in verbal fluency is well documented 4,5,6,7,8,9,10,11 . However, there are fewer studies about the effect of the stimulation per se, comparing on-and off-stimulation conditions 12,13,14 . Longitudinal studies verified a worsening of verbal fluency in the first months after surgery, but an improvement in the later studied months 9 . These authors suggest that this effect of the DBS on the verbal fluency may be due to the micro-lesions caused by the implantation procedure of the electrodes in the STN.The verbal fluency test evaluates the capacity to search and retrieve data stored in long-term memory within a certain category and demonstrates the capacities of

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Section: Subthalamic Nucleus Deep Brain Stimulation (Stn-dbs)mentioning

confidence: 99%

Different outcomes of phonemic verbal fluency in Parkinson’s disease patients with subthalamic nucleus deep brain stimulation

Romann

Beber

Olchik

et al. 2017

Arq. Neuro-Psiquiatr.

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“…Previous studies examining patterns of clustering and switching based on semantics have almost exclusively focused on category-based (semantic) fluency tasks. We know of only one prior study, conducted by Schwartz and coworkers [1], that looked at the influence of semantic memory on letter fluency. Using multidimensional statistical approaches to evaluate semantic and phonemic relationships between generated items they demonstrated that conceptual knowledge and semantic organization indeed appears to play a crucial role in guiding word retrieval in letter fluency tasks.…”

Section: A Fluency and Age-related Changes In Semantic Processingmentioning

confidence: 99%

“…Using multidimensional statistical approaches to evaluate semantic and phonemic relationships between generated items they demonstrated that conceptual knowledge and semantic organization indeed appears to play a crucial role in guiding word retrieval in letter fluency tasks. However, since two-choice fluency tasks were used in that study, which allowed subjects to generate items beginning with either of two initial letters (letter fluency) or belonging to either of two different categories (semantic fluency) [1] it is difficult to know to what extent these findings generalize to traditional single letter fluency tasks.…”

Section: A Fluency and Age-related Changes In Semantic Processingmentioning

confidence: 99%

“…One exception comes from a study using a multidimensional approach which demonstrated that sequential patterns of letter fluency output are not only influenced by phonemics but also semantics [1]. To our knowledge no other study has looked at age-related changes in semantic relatedness between successive words in traditional letter word fluency tests.…”

Section: Introductionmentioning

confidence: 99%

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Age Effects on Semantic Coherence: Latent Semantic Analysis Applied to Letter Fluency Data

Marklund

Sikström

Bååth

et al. 2009

2009 Third International Conference on Advances in Semantic Processing

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Abstract-We investigated age-related changes in the semantic distance between successively generated words in two letter fluency tasks differing with respect to demands placed on executive control. The semantic distance was measured by Latent Semantic Analysis (LSA). The results show that older people have a larger semantic distance between successively generated items than young people, and that this effect is particularly pronounced in the more demanding fluency task. Taken together, our findings support the idea that elderly have a less distinct semantic network compared to young people while also demonstrating the feasibility of LSA as a powerful tool for delineating multifaceted aspects of semantic organization inherent in behavioural data from language production tasks.

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“…A feladatok közül az "ÁLLAT" szemantikus fluencia feladat bizonyult a legkönnyebbnek, amely alátámasztja néhány korábbi kutatás eredményeit (Baldo és Shimamura, 1998;Chan és Poon, 1999;Schwartz, Baldo, Graves és Brugger, 2003). A szavak számát tekintve a teljesítmény már 5-6 éves korban is magasabb volt, mint a betűfluencia feladaton.…”

Section: öSszegzés éS További Kutatási Lehetőségekunclassified

A verbális fluencia és a munkamemória életkori változásai és szerepük az iskolai teljesítményben

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Pervasive influence of semantics in letter and category fluency: A multidimensional approach

Cited by 77 publications

References 66 publications

Different outcomes of phonemic verbal fluency in Parkinson’s disease patients with subthalamic nucleus deep brain stimulation

Different outcomes of phonemic verbal fluency in Parkinson’s disease patients with subthalamic nucleus deep brain stimulation

Age Effects on Semantic Coherence: Latent Semantic Analysis Applied to Letter Fluency Data

A verbális fluencia és a munkamemória életkori változásai és szerepük az iskolai teljesítményben

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