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https://www.readbyqxmd.com/read/29145178/minor-hemisphere-major-syndromes
#1
Antonio Carota, Julien Bogousslavsky
A right "minor hemisphere" does not exist as the right hemisphere is dominant for awareness (nosognosia), spatial attention, emotional regulation, facial and voice expressions, visual recognition, and topographical orientation. Without the right hemisphere, the world would be flat, deprived of general and spatial attentions, pointing preferentially to the right side of the space, lacking visual experiences and emotions, exhibiting diminished awareness of the self and environment. Clinical-related syndromes of the right hemisphere are unilateral spatial neglect, object and face visual agnosia, the anosognosia for hemiparesis and/or hemianopia, misidentification syndromes, mania, and other obsessions for the food and the body...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29122459/resolution-of-anton-babinski-syndrome-after-systemic-thrombolysis-and-mechanical-thrombectomy-with-a-stentriever
#2
Giuseppe Leone, Sergio Nappini, Andrea Wlderk, Antonio Laiso, Maria Lamassa, Patrizia Nencini, Salvatore Mangiafico, Nicola Limbucci
Anton-Babinski syndrome is a rare neuropsychiatric syndrome characterized by bilateral cortical blindness and anosognosia with visual confabulation. We present the case of a patient presenting with occlusion of both posterior cerebral arteries (PCA), with Anton-Babinski syndrome, completely solved after combined systemic thrombolysis and mechanical thrombectomy with a stent-retriever.
November 6, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29102412/anosognosia-denial-of-illness-and-the-right-hemisphere-dominance-for-emotions-some-historical-and-clinical-notes
#3
REVIEW
Guido Gainotti
Poor disease awareness ('anosognosia') is often observed in patients with various disabilities caused by brain damage. The lack of disease awareness can be due to the disruption of specific cognitive mechanisms and the development of psychodynamic mechanisms of denial. The aim of this paper is to review how these phenomena were discovered and evolved over time and to consider the relationships between them and the right hemisphere dominance for emotions. It is not clear whether the term 'anosognosia' refers to a basic mechanism that can explain similar awareness defects in different behavioural domains or whether it must be viewed as a multifaceted phenomenon in which both the disruption of cognitive or sensorimotor mechanisms and the emergence of motivational factors can play different roles in various forms of disease unawareness and in different kinds of 'anosognosic' patients...
October 25, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/29089874/mistakes-too-few-to-mention-impaired-self-conscious-emotional-processing-of-errors-in-the-behavioral-variant-of-frontotemporal-dementia
#4
Carole S Scherling, Jessica Zakrzewski, Samir Datta, Robert W Levenson, Arthur P Shimamura, Virginia E Sturm, Bruce L Miller, Howard J Rosen
Anosognosia, or lack of awareness of one's deficits, is a core feature of the behavioral variant of frontotemporal dementia (bvFTD). We hypothesized that this deficit has its origins in failed emotional processing of errors. We studied autonomic and facial emotional reactivity to errors in patients with bvFTD (n = 17), Alzheimer's disease (AD, n = 20), and healthy controls (HC, n = 35) during performance of a timed two-alternative-choice button press task. Performance-related behavioral responses to errors were quantified using rates of error correction and post-error slowing of reaction times...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29028874/impaired-self-awareness-of-motor-disturbances-in-parkinson-s-disease
#5
Franziska Maier, George P Prigatano
Traditionally, anosognosia for cognitive or motor impairments in patients with Parkinson's disease (PD) was viewed as unlikely unless the patient was demented. More recent research has suggested that a portion of non-demented PD patients (30%-50%) in fact have impaired subjective awareness (ISA) of their motor impairments (ISAm). This empirical finding has implications for the clinical neuropsychological examination of PD patients and raises theoretical questions relevant to the broader study of anosognosia seen in other patient groups...
November 1, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29022655/anosognosia-is-an-independent-predictor-of-conversion-from-mild-cognitive-impairment-to-alzheimer-s-disease-and-is-associated-with-reduced-brain-metabolism
#6
Philip Gerretsen, Jun Ku Chung, Parita Shah, Eric Plitman, Yusuke Iwata, Fernando Caravaggio, Shinichiro Nakajima, Bruce G Pollock, Ariel Graff-Guerrero
OBJECTIVE: Anosognosia, or impaired illness awareness, is a common feature of Alzheimer's disease (AD) and less so of mild cognitive impairment (MCI). Importantly, anosognosia negatively influences clinical outcomes for patients and their caregivers and may predict the conversion from MCI to AD. This study aimed to examine (1) the relationship between brain glucose metabolism as measured by fluorine-18 fluorodeoxyglucose positron emission tomography (FDG-PET) and anosognosia in patients with MCI and AD and (2) the predictive utility of anosognosia in patients with MCI for later conversion to AD, even when controlling for other factors, including gender, education, apolipoprotein E ε4 carrier status, dementia severity, and cognitive dysfunction...
October 10, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28991661/behavioral-and-affective-features-of-amyotrophic-lateral-sclerosis-patients
#7
Yasuyuki Ohta, Kota Sato, Mami Takemoto, Yoshiaki Takahashi, Ryuta Morihara, Yumiko Nakano, Keiichiro Tsunoda, Emi Nomura, Nozomi Hishikawa, Toru Yamashita, Koji Abe
Evaluating the cognitive and behavioral features in amyotrophic lateral sclerosis (ALS) patients is important for therapy and care. Fifty-seven ALS, 5 ALS with the behavioral variant of frontotemporal dementia (FTD) (ALS-FTD), 12 FTD patients, and 35 control subjects were evaluated by 10 different tests for cognitive and behavioral (mini-mental state examination (MMSE), Hasegawa dementia rating scale - revised (HDS-R), frontal assessment battery (FAB), Montreal cognitive assessment (MoCA), ALS-frontotemporal dementia-Questionnaire (ALS-FTD-Q), and anosognosia scale), affective (depression, apathy, and behavioral and psychological symptoms of dementia (BPSD)), and activities of daily living (ADL) assessments...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28843132/henry-where-have-you-lost-your-self
#8
Nathalie Philippi, Daniel Roquet, Hédi Ben Malek, Vincent Noblet, Anne Botzung, Benjamin Cretin, Frédéric Blanc
The Self is a complex construct encompassing distinct components, including episodic and semantic autobiographical memory, the Self-concept, and the subjective sense of Self, which highest level consists of Self-awareness. The neuro-anatomical correlates are complex, and it is debated as to whether a common region could support these different components of the Self, with a particular interest for the cortical midline structures and the medial prefrontal cortex (MPFC). Alzheimer's disease (AD) constitutes an interesting model for the study of Self as autobiographical memory typically deteriorates as the disease progresses...
July 14, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28840743/self-awareness-for-memory-impairment-in-amnestic-mild-cognitive-impairment-a-longitudinal-study
#9
Ilaria Cova, Giulia Grande, Valentina Cucumo, Roberta Ghiretti, Laura Maggiore, Daniela Galimberti, Elio Scarpini, Claudio Mariani, Simone Pomati
AIM: To assess memory impairment insight as a predictor of dementia and Alzheimer's disease (AD) in amnestic mild cognitive impairment (MCI). METHODS: To verify whether the awareness of memory impairment assessed by Geriatric Depression Scale (GDS) was associated with the risk of progression to dementia and AD in a cohort of MCI, we used a Cox regression model adjusted for age, sex, education, subtypes of amnestic MCI, Mini-Mental State Examination, Cumulative Illness Rating Scale severity index, and apolipoprotein E genotype...
January 1, 2017: American Journal of Alzheimer's Disease and Other Dementias
https://www.readbyqxmd.com/read/28836490/unawareness-for-motor-impairment-and-distorted-perception-of-task-difficulty
#10
Gianna Cocchini, Nicoletta Beschin, Sergio Della Sala
OBJECTIVES: Anosognosia for motor impairment is a complex syndrome that can manifest itself under different forms, guiding patients' behavior and task decisions. However, current diagnostic tools tend to evaluate only more explicit aspects of anosognosia (asking the patients about their motor abilities) and fail to address more subtle features of awareness. We have developed a new assessment measure, the ECT (Errand Choice Test), where patients are asked to judge task difficulty rather than estimate their own impairment...
August 24, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28806707/deviant-functional-activation-and-connectivity-of-the-right-insula-are-associated-with-lack-of-awareness-of-episodic-memory-impairment-in-nonamnesic-alcoholism
#11
Anne-Pascale Le Berre, Eva M Müller-Oehring, Tilman Schulte, Matthew R Serventi, Adolf Pfefferbaum, Edith V Sullivan
A disorder of metamemory, expressed as unawareness of mnemonic ability, is typically associated with the profound amnesia of Korsakoff's Syndrome (KS). A similar but less severe type of limited awareness can also occur in non-KS alcoholism and is observed as an impairment in generating Feeling-of-Knowing (FOK) predictions about future recognition performance. We previously found that FOK accuracy was selectively related to volumes of the insula in alcoholics involved in the present study. Unknown, however, are the neural substrates of unawareness of memory impairment in alcoholism...
October 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28740390/brain-regions-associated-with-anosognosia-for-memory-disturbance-in-alzheimer-s-disease-a-magnetic-resonance-imaging-study
#12
Hiroshi Fujimoto, Teruyuki Matsuoka, Yuka Kato, Keisuke Shibata, Kaeko Nakamura, Kei Yamada, Jin Narumoto
BACKGROUND AND OBJECTIVE: Patients with Alzheimer's disease (AD) are frequently unaware of their cognitive symptoms and medical diagnosis. The term "anosognosia" is used to indicate a general lack of awareness of one's disease or disorder. The neural substrate underlying anosognosia in AD is unclear. Since anosognosia for memory disturbance might be an initial sign of AD, it is important to determine the neural correlates. This study was designed to investigate the characteristics and neural correlates of anosognosia for memory disturbance in patients with mild AD...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28699151/-emotion-recognition-rehabilitation-combined-with-cognitive-stimulation-for-people-with-alzheimer-s-disease-efficacy-for-cognition-and-functional-aspects
#13
J A Garcia-Casal, M Goni-Imizcoz, M V Perea-Bartolome, C Garcia-Moja, S Calvo-Simal, F Cardelle-Garcia, M Franco-Martin
INTRODUCTION: The ability to recognize facial emotional expression is essential for social interactions and adapting to the environment. Emotion recognition is impaired in people with Alzheimer's disease (AD), thus rehabilitation of these skills has the potential to elicit significant benefits. AIM: To assess the efficacy of a combined treatment of rehabilitation of emotion recognition (RER) and cognitive stimulation (CS) for people with AD, due to its potential implications for more effective psychosocial interventions...
August 1, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28671134/low-cognitive-awareness-but-not-complaint-is-a-good-marker-of-preclinical-alzheimer-s-disease
#14
Federica Cacciamani, Caroline Tandetnik, Geoffroy Gagliardi, Hugo Bertin, Marie-Odile Habert, Harald Hampel, Laurie Boukadida, Marie Révillon, Stéphane Epelbaum, Bruno Dubois
BACKGROUND: Subjective cognitive decline (SCD) may result from many conditions, including Alzheimer's disease (AD). OBJECTIVE: In this study, we searched for a specific pattern of SCD in asymptomatic individuals at risk for AD. METHODS: Cognitively normal older adults (N = 318) reporting SCD and their informants were enrolled in the INSIGHT-PreAD cohort. We examined the relationship between six SCD measures and both cognitive scores and AD neuroimaging markers (amyloid burden, hippocampal atrophy and brain hypometabolism)...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28616381/anosognosia-for-memory-deficits-in-mild-cognitive-impairment-insight-into-the-neural-mechanism-using-functional-and-molecular-imaging
#15
Patrizia Vannini, Bernard Hanseeuw, Catherine E Munro, Rebecca E Amariglio, Gad A Marshall, Dorene M Rentz, Alvaro Pascual-Leone, Keith A Johnson, Reisa A Sperling
Anosognosia, or loss of insight of memory deficits, is a common and striking symptom in Alzheimer's disease (AD). Previous findings in AD dementia patients suggest that anosognosia is due to both functional metabolic changes within cortical midline structures involved in self-referential processes, as well as functional disconnection between these regions. The present study aims to extend these findings by investigating the neural correlates of anosognosia in the prodromal stage of AD. Here, we used regional brain metabolism (resting state 18-F fluorodeoxyglucose positron emission tomography (FDG-PET)) to unravel the metabolic correlates of anosognosia in subjects with amnestic mild cognitive impairment (aMCI) and subsequently resting state functional magnetic resonance imaging (rs-fMRI) to investigate the intrinsic connectivity disruption between brain regions...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28501758/modulating-anosognosia-for-hemiplegia-the-role-of-dangerous-actions-in-emergent-awareness
#16
Daniela D'Imperio, Cristina Bulgarelli, Sara Bertagnoli, Renato Avesani, Valentina Moro
Anosognosia for hemiplegia is a lack of awareness of motor deficits following a right hemisphere lesion. Residual forms of awareness co-occur with an explicit denial of hemiplegia. The term emergent awareness refers to a condition in which awareness of motor deficits is reported verbally during the actual performance of an action involving the affected body part. In this study, two tasks were used to explore the potential effects of i) attempting actions which are impossible for sufferers of hemiplegia and ii) attempting actions which are potentially dangerous...
April 21, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28484905/historical-perspectives-on-ancient-greek-derived-a-prefixed-nomenclature-for-acquired-neurocognitive-impairment
#17
REVIEW
Philip Gerard Gasquoine
Distinct forms of acquired neurocognitive impairment are often described by "a" prefixed terms that derive from ancient Greek (and in one case Latin). Two modern English language neurological and neuropsychological reference books were searched to identify 17 such terms in contemporary usage: amnesia, akinesia, ataxia, aphasia, agraphia, anosmia, apraxia, athetosis, ageusia, achromatopsia, agnosia, alexia, amusia, anomia, anarthria, anosognosia, and acalculia. These were traced to their initial association with acquired neurocognitive impairment in German, English, and French language medical publications from the late 18th, 19th, and early 20th centuries (1770 through 1920)...
June 2017: Neuropsychology Review
https://www.readbyqxmd.com/read/28436930/a-framework-for-ethical-decision-making-in-the-rehabilitation-of-patients-with-anosognosia
#18
Anna Rita Egbert
Currently, the number of patients diagnosed with impaired self-awareness of their own deficits after brain injury-anosognosia-is increasing. One reason is a growing understanding of this multifaceted phenomenon. Another is the development and accessibility of alternative measurements that allow more detailed diagnoses. Anosognosia can adversely affect successful rehabilitation, as often patients lack confidence in the need for treatment. Planning such treatment can become a complex process full of ethical dilemmas...
2017: Journal of Clinical Ethics
https://www.readbyqxmd.com/read/28421896/anosognosia-and-its-relation-to-psychiatric-symptoms-in-early-onset-alzheimer-disease
#19
MULTICENTER STUDY
Bora Yoon, Yong S Shim, Yun Jeong Hong, Seong Hye Choi, Hee Kyung Park, Sun Ah Park, Jee Hyang Jeong, Soo Jin Yoon, Dong-Won Yang
BACKGROUND: We investigated differences in the prevalence of anosognosia and neuropsychiatric symptoms (NPSs) characteristics according to disease severity in patients with early-onset Alzheimer disease (EOAD). METHODS: We recruited 616 patients with EOAD. We subdivided participants into 2 groups based on the presence or absence of anosognosia and then again by Clinical Dementia Rating (CDR) scale. We compared the differences in the Neuropsychiatric Inventory (NPI) scores according to anosognosia and disease severity...
May 2017: Journal of Geriatric Psychiatry and Neurology
https://www.readbyqxmd.com/read/28385579/memory-self-awareness-in-the-preclinical-and-prodromal-stages-of-alzheimer-s-disease
#20
Patrizia Vannini, Rebecca Amariglio, Bernard Hanseeuw, Keith A Johnson, Donald G McLaren, Jasmeer Chhatwal, Alvaro Pascual-Leone, Dorene Rentz, Reisa A Sperling
While loss of insight of cognitive deficits, anosognosia, is a common symptom in Alzheimer's disease dementia, there is a lack of consensus regarding the presence of altered awareness of memory function in the preclinical and prodromal stages of the disease. Paradoxically, very early in the Alzheimer's disease process, individuals may experience heightened awareness of memory changes before any objective cognitive deficits can be detected, here referred to as hypernosognosia. In contrast, awareness of memory dysfunction shown by individuals with mild cognitive impairment (MCI) is very variable, ranging from marked concern to severe lack of insight...
May 2017: Neuropsychologia
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