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Logopenic variant

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https://www.readbyqxmd.com/read/27875715/common-and-divergent-neural-correlates-of-anomia-in-amnestic-and-logopenic-presentations-of-alzheimer-s-disease
#1
Cristian E Leyton, John R Hodges, Olivier Piguet, Kirrie J Ballard
The majority of logopenic variant primary progressive aphasia (lv-PPA) cases harbour Alzheimer pathology, suggesting that lv-PPA constitutes an atypical presentation of Alzheimer's disease (AD). However, even if caused by Alzheimer pathology, the clinical manifestations of lv-PPA differ from those observed in the typical or amnestic AD presentation: in lv-PPA, aphasia is the main feature while amnestic AD is characterised by impaired episodic memory. Anomia or impaired naming, however, is present in both AD presentations...
November 5, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27858708/cerebrospinal-fluid-biomarkers-as-a-diagnostic-tool-of-the-underlying-pathology-of-primary-progressive-aphasia
#2
George P Paraskevas, Dimitrios Kaselimis, Evie Kourtidou, Vasilios Constantinides, Anastasia Bougea, Costas Potagas, Ioannis Evdokimidis, Elisabeth Kapaki
BACKGROUND: Primary progressive aphasia (PPA) may present with three main clinical variants, namely nonfluent agrammatic (nfaPPA), semantic (sPPA), and logopenic (lPPA) subtypes. Frontotemporal lobar degenerations (FTLD) or Alzheimer's disease (AD) are the most common etiologies. OBJECTIVE: To study the potential of cerebrospinal fluid (CSF) biomarkers for identifying the underlying pathology in patients with PPA. METHODS: CSF levels of total tau protein (τT), amyloid-β peptide (Aβ42), and tau phosphorylated at threonine-181 (τP - 181) were measured by double sandwich, enzyme-linked immunosorbent assay (ELISA) in 43 patients with PPA, 26 patients with AD, and 17 healthy controls...
November 14, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27815682/amyloid-pet-in-primary-progressive-aphasia-case-series-and-systematic-review-of-the-literature
#3
Alberto Villarejo-Galende, Sara Llamas-Velasco, Adolfo Gómez-Grande, Verónica Puertas-Martín, Israel Contador, Pilar Sarandeses, Marta González-Sánchez, Rocío Trincado, Patrick Pilkington, Sebastián Ruiz-Solis, David A Pérez-Martínez, Alejandro Herrero-San Martín
Primary progressive aphasia (PPA) is considered a heterogeneous syndrome, with different clinical subtypes and neuropathological causes. Novel PET biomarkers may help to predict the underlying neuropathology, but many aspects remain unclear. We studied the relationship between amyloid PET and PPA variant in a clinical series of PPA patients. A systematic review of the literature was performed. Patients with PPA were assessed over a 2-year period and classified based on language testing and the International Consensus Criteria as non-fluent/agrammatic (nfvPPA), semantic (svPPA), logopenic variant (lvPPA) or as unclassifiable (ucPPA)...
November 4, 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27802232/varying-degrees-of-temporoparietal-hypometabolism-on-fdg-pet-reveal-amyloid-positive-logopenic-primary-progressive-aphasia-is-not-a%C3%A2-homogeneous-clinical-entity
#4
Kamini Krishnan, Mary M Machulda, Jennifer L Whitwell, Alissa M Butts, Joseph R Duffy, Edythe A Strand, Matthew L Senjem, Anthony J Spychalla, Clifford R Jack, Val J Lowe, Keith A Josephs
BACKGROUND: The logopenic variant of primary progressive aphasia (lvPPA) manifests due to a breakdown of the language network with prominent hypometabolism of the left temporoparietal region. LvPPA is strongly associated with amyloid deposition, yet there is question as to whether it is a homogeneous clinical entity. OBJECTIVE: This study investigated whether differences in temporoparietal metabolic patterns on 18F fludeoxyglucose positron emission tomography (FDG-PET) could elucidate brain regions preferentially affected in lvPPA...
October 12, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27802226/music-perception-in-dementia
#5
Hannah L Golden, Camilla N Clark, Jennifer M Nicholas, Miriam H Cohen, Catherine F Slattery, Ross W Paterson, Alexander J M Foulkes, Jonathan M Schott, Catherine J Mummery, Sebastian J Crutch, Jason D Warren
Despite much recent interest in music and dementia, music perception has not been widely studied across dementia syndromes using an information processing approach. Here we addressed this issue in a cohort of 30 patients representing major dementia syndromes of typical Alzheimer's disease (AD, n = 16), logopenic aphasia (LPA, an Alzheimer variant syndrome; n = 5), and progressive nonfluent aphasia (PNFA; n = 9) in relation to 19 healthy age-matched individuals. We designed a novel neuropsychological battery to assess perception of musical patterns in the dimensions of pitch and temporal information (requiring detection of notes that deviated from the established pattern based on local or global sequence features) and musical scene analysis (requiring detection of a familiar tune within polyphonic harmony)...
October 11, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27790240/lack-of-frank-agrammatism-in-the-nonfluent-agrammatic-variant-of-primary-progressive-aphasia
#6
Naida L Graham, Carol Leonard, David F Tang-Wai, Sandra Black, Tiffany W Chow, Chris J M Scott, Alicia A McNeely, Mario Masellis, Elizabeth Rochon
BACKGROUND/AIMS: Frank agrammatism, defined as the omission and/or substitution of grammatical morphemes with associated grammatical errors, is variably reported in patients with nonfluent variant primary progressive aphasia (nfPPA). This study addressed whether frank agrammatism is typical in agrammatic nfPPA patients when this feature is not required for diagnosis. METHOD: We assessed grammatical production in 9 patients who satisfied current diagnostic criteria...
September 2016: Dementia and Geriatric Cognitive Disorders Extra
https://www.readbyqxmd.com/read/27662315/the-role-of-single-subject-brain-metabolic-patterns-in-the-early-differential-diagnosis-of-primary-progressive-aphasias-and-in-prediction-of-progression-to-dementia
#7
Chiara Cerami, Alessandra Dodich, Lucia Greco, Sandro Iannaccone, Giuseppe Magnani, Alessandra Marcone, Elisabetta Pelagallo, Roberto Santangelo, Stefano F Cappa, Daniela Perani
BACKGROUND AND OBJECTIVE: Primary progressive aphasia (PPA) is a clinical syndrome due to different neurodegenerative conditions in which an accurate early diagnosis needs to be supported by a reliable diagnostic tool at the individual level. In this study, we investigated in PPA the FDG-PET brain metabolic patterns at the single-subject level, in order to assess the case-to-case variability and its relationship with clinical-neuropsychological findings. MATERIAL AND METHODS: 55 patients (i...
November 1, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27589533/primary-progressive-aphasia-in-the-network-of-french-alzheimer-plan-memory-centers
#8
Eloi Magnin, Jean-François Démonet, David Wallon, Julien Dumurgier, Anne-Cécile Troussière, Alain Jager, Emmanuelle Duron, Audrey Gabelle, Vincent de la Sayette, Lisette Volpe-Gillot, Gregory Tio, Sarah Evain, Claire Boutoleau-Bretonnière, Adeline Enderle, François Mouton-Liger, Philippe Robert, Didier Hannequin, Florence Pasquier, Jacques Hugon, Claire Paquet
BACKGROUND: Few demographical data about primary progressive aphasia (PPA) are available, and most knowledge regarding PPA is based on tertiary centers' results. OBJECTIVE: Our aims were to describe demographical characteristics of the PPA population in a large sample of PPA patients from the network of French Alzheimer plan memory centers (Sample 1), and to describe the stratification of cerebrospinal fluid (CSF) biomarkers in two different samples of PPA patients (Samples 2 and 3)...
October 18, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27581216/serum-neurofilament-light-chain-protein-is-a-measure-of-disease-intensity-in-frontotemporal-dementia
#9
Jonathan D Rohrer, Ione O C Woollacott, Katrina M Dick, Emilie Brotherhood, Elizabeth Gordon, Alexander Fellows, Jamie Toombs, Ronald Druyeh, M Jorge Cardoso, Sebastien Ourselin, Jennifer M Nicholas, Niklas Norgren, Simon Mead, Ulf Andreasson, Kaj Blennow, Jonathan M Schott, Nick C Fox, Jason D Warren, Henrik Zetterberg
OBJECTIVE: To investigate serum neurofilament light chain (NfL) concentrations in frontotemporal dementia (FTD) and to see whether they are associated with the severity of disease. METHODS: Serum samples were collected from 74 participants (34 with behavioral variant FTD [bvFTD], 3 with FTD and motor neuron disease and 37 with primary progressive aphasia [PPA]) and 28 healthy controls. Twenty-four of the FTD participants carried a pathogenic mutation in C9orf72 (9), microtubule-associated protein tau (MAPT; 11), or progranulin (GRN; 4)...
September 27, 2016: Neurology
https://www.readbyqxmd.com/read/27566743/aphasic-variant-of-alzheimer-disease-clinical-anatomic-and-genetic-features
#10
Emily Rogalski, Jaiashre Sridhar, Benjamin Rader, Adam Martersteck, Kewei Chen, Derin Cobia, Cynthia K Thompson, Sandra Weintraub, Eileen H Bigio, M-Marsel Mesulam
OBJECTIVE: To identify features of primary progressive aphasia (PPA) associated with Alzheimer disease (AD) neuropathology. A related objective was to determine whether logopenic PPA is a clinical marker for AD. METHODS: A total of 139 prospectively enrolled participants with a root diagnosis of PPA constituted the reference set. Those with autopsy or biomarker evidence of AD, and who had been evaluated at mild disease stages (Aphasia Quotient ≥85), were included (n = 19)...
September 27, 2016: Neurology
https://www.readbyqxmd.com/read/27524196/-profiles-of-cognitive-and-language-impairment-of-logopenic-and-non-fluent-variant-of-primary-progressive-aphasia
#11
D Li, L N Zhao, H M Jin, M Zhang, D M Guo, Y Y Yu, L Y Wu, Y Tang, F Y Li, A H Zhou, Y Han, J P Jia
OBJECTIVE: To decipher the cognitive and linguistic feature of logopenic variant primary progressive aphasia (lv-PPA) and nonfluent variant primary progressive aphasia (nfv-PPA) and to explore the extent to which cognitive and language impairment contribute to the dysfunction of activity of daily living(ADL). METHODS: Seven lv-PPA and five nfv-PPA were enrolled in memory clinic of Xuanwu Hospital, Capital Medical University from January 2015 to January 2016 accordig to the international consensus criteria for PPA and its three subtypes...
August 2, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27344155/left-prefrontal-repetitive-transcranial-magnetic-stimulation-in-a-logopenic-variant-of-primary-progressive-aphasia-a-case-report
#12
Matthieu Bereau, Eloi Magnin, Magali Nicolier, Louis Berthet, Elfried Dariel, Sabrina Ferreira, Géraldine Sylvestre, Julie Monnin, Gilles Chopard, Hatem Bouladour, Pierre Vandel, Emmanuel Haffen
BACKGROUND/AIMS: High frequency repetitive transcranial magnetic stimulation (hf-rTMS) improves language skills in Alzheimer's disease (AD). We report the use of hf-rTMS in a patient with logopenic primary progressive aphasia (LPPA) due to AD. METHOD: hf-rTMS was applied to the left dorsolateral prefrontal cortex of a LPPA patient. Cerebral perfusion, neuropsychological and linguistic performances were evaluated before and 1 month after hf-rTMS. RESULTS: The tolerance was good...
2016: European Neurology
https://www.readbyqxmd.com/read/27340847/comparing-longitudinal-behavior-changes-in-the-primary-progressive-aphasias
#13
Tim Van Langenhove, Cristian E Leyton, Olivier Piguet, John R Hodges
BACKGROUND: Differentiating between primary progressive aphasia (PPA) variants based on the profile of language deficits can be difficult in a proportion of patients. Further, little is presently know about the pattern of longitudinal changes in behavior in PPA variants. OBJECTIVE: To determine the presence of behavioral changes in the main variants of PPA: semantic (sv-PPA), nonfluent/agrammatic (nfv-PPA), and logopenic (lv-PPA), and establish the course of these changes over time...
June 18, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27321169/18f-fdg-pet-ct-and-functional-mri-in-a-case-of-crossed-logopenic-primary-progressive-aphasia
#14
M N Cabrera-Martín, J A Matías-Guiu, M Yus-Fuertes, M Valles-Salgado, T Moreno-Ramos, J Matías-Guiu, J L Carreras Delgado
Primary progressive aphasia is a clinical syndrome caused by a neurodegeneration of areas and neural networks involved in language, usually in the left hemisphere. The term "crossed aphasia" denotes an acquired language dysfunction caused by a lesion in the hemisphere ipsilateral to the dominant hand. A case is presented on a 75-year-old right-handed woman with a logopenic variant of primary progressive aphasia with word-finding difficulties of 2 years onset. The (18)F-FDG PET-CT showed right temporoparietal hypometabolism...
June 16, 2016: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/27251676/utility-of-testing-for-apraxia-and-associated-features-in-dementia
#15
Samrah Ahmed, Ian Baker, Sian Thompson, Masud Husain, Christopher R Butler
INTRODUCTION: Existing literature suggests that the presence or absence of apraxia and associated parietal deficits may be clinically relevant in differential diagnosis of dementia syndromes. AIM: This study investigated the profile of these features in Alzheimer's disease (AD) and frontotemporal dementia (FTD) spectrum disorders, at first presentation. METHODS: Retrospective case note analysis was undertaken in 111 patients who presented to the Oxford Cognitive Disorders Clinic, Oxford, UK, including 29 amnestic AD, 12 posterior cortical atrophy (PCA), 12 logopenic primary progressive aphasia (lvPPA), 20 behavioural variant FTD (bvFTD), 7 non-fluent variant PPA (nfvPPA), 6 semantic variant PPA (svPPA) and 25 patients with subjective cognitive impairment (SCI)...
November 2016: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/27156508/-language-symptoms-of-alzheimer-s-disease
#16
Shunichiro Shinagawa
Alzheimer's disease (AD) is a neurodegenerative disorder mainly characterized by progressive memory disturbance. Language symptoms are considered to be less disease specific and therefore did not attract many researchers, interest until recently. Typical patients with AD present amnesic aphasia in the early disease stage followed by transcortical sensory aphasia; however, their language symptoms are varied. Recently, the concept of logopenic variant of primary progressive aphasia (PPA) has been developed, which is reported to have Alzheimer's neuropathology...
May 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27097664/classification-of-the-primary-progressive-aphasias-principles-and-review-of-progress-since-2011
#17
REVIEW
Rik Vandenberghe
Highly influential recommendations published in 2011 for the classification of the primary progressive aphasias (PPA) distinguished three subtypes: the semantic variant, the nonfluent/agrammatic variant, and the logopenic variant. We review empirical evidence published after 2011 that bears relevance to the validity of the recommended classification scheme. The studies that we review principally rely on monocentric, memory clinic-based consecutive series of PPA patients. We review whether a data-driven analysis of neurolinguistic test scores confirms the subtyping that was based on expert consensus, whether the 2011 subtyping covers the diversity of PPA in a comprehensive manner, and whether the proposed subgroups differ along dimensions that are not explicitly part of the defining criteria, such as diffusion tractography...
April 21, 2016: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/27087732/telerehabilitation-of-anomia-in-primary-progressive-aphasia
#18
Aaron M Meyer, Heidi R Getz, David M Brennan, Tang M Hu, Rhonda B Friedman
BACKGROUND: The efficacy of telerehabilitation-based treatment for anomia has been demonstrated in post-stroke aphasia, but the efficacy of this method of anomia treatment delivery has not been established within the context of degenerative illness. AIMS: The current study evaluated the feasibility and efficacy of a telerehabilitation-based approach to anomia treatment within the three subtypes of primary progressive aphasia (PPA). METHODS & PROCEDURES: Each of the three telerehabilitation participants represented a distinct subtype of PPA...
April 1, 2016: Aphasiology
https://www.readbyqxmd.com/read/27063691/exploring-generalisation-processes-following-lexical-retrieval-intervention-in-primary-progressive-aphasia
#19
Ashleigh Beales, Jade Cartwright, Anne Whitworth, Peter K Panegyres
PURPOSE: Within the current literature, positive intervention effects demonstrate the significant potential for people with Primary Progressive Aphasia (PPA) to learn/relearn words. Generalisation of intervention effects to other words and/or other contexts, however, remains unclear. METHOD: This multiple baseline, case-series design investigated the effects of a self-cueing lexical retrieval intervention across word classes (nouns, verbs and adjectives) on four individuals with PPA, three suggestive of the semantic variant and one of the logopenic variant...
June 2016: International Journal of Speech-language Pathology
https://www.readbyqxmd.com/read/27060523/core-auditory-processing-deficits-in-primary-progressive-aphasia
#20
Manon Grube, Rose Bruffaerts, Jolien Schaeverbeke, Veerle Neyens, An-Sofie De Weer, Alexandra Seghers, Bruno Bergmans, Eva Dries, Timothy D Griffiths, Rik Vandenberghe
The extent to which non-linguistic auditory processing deficits may contribute to the phenomenology of primary progressive aphasia is not established. Using non-linguistic stimuli devoid of meaning we assessed three key domains of auditory processing (pitch, timing and timbre) in a consecutive series of 18 patients with primary progressive aphasia (eight with semantic variant, six with non-fluent/agrammatic variant, and four with logopenic variant), as well as 28 age-matched healthy controls. We further examined whether performance on the psychoacoustic tasks in the three domains related to the patients' speech and language and neuropsychological profile...
June 2016: Brain: a Journal of Neurology
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