Website Lecture 3 Visuospatial Deficits and Visual Agnosia
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Meta-Analytic Connectivity Modeling of Brodmann Area 37
Florida International University FIU Digital Commons Nicole Wertheim College of Nursing and Health Nicole Wertheim College of Nursing and Health Sciences Sciences 12-17-2014 Language and Visual Perception Associations: Meta-Analytic Connectivity Modeling of Brodmann Area 37 Alfredo Ardilla Department of Communication Sciences and Disorders, Florida International University, [email protected] Byron Bernal Miami Children's Hospital Monica Rosselli Florida Atlantic University Follow this and additional works at: https://digitalcommons.fiu.edu/cnhs_fac Part of the Physical Sciences and Mathematics Commons Recommended Citation Ardilla, Alfredo; Bernal, Byron; and Rosselli, Monica, "Language and Visual Perception Associations: Meta-Analytic Connectivity Modeling of Brodmann Area 37" (2014). Nicole Wertheim College of Nursing and Health Sciences. 1. https://digitalcommons.fiu.edu/cnhs_fac/1 This work is brought to you for free and open access by the Nicole Wertheim College of Nursing and Health Sciences at FIU Digital Commons. It has been accepted for inclusion in Nicole Wertheim College of Nursing and Health Sciences by an authorized administrator of FIU Digital Commons. For more information, please contact [email protected]. Hindawi Publishing Corporation Behavioural Neurology Volume 2015, Article ID 565871, 14 pages http://dx.doi.org/10.1155/2015/565871 Research Article Language and Visual Perception Associations: Meta-Analytic Connectivity Modeling of Brodmann Area 37 Alfredo Ardila,1 Byron Bernal,2 and Monica Rosselli3 1 Department of Communication Sciences and Disorders, Florida International University, Miami, FL 33199, USA 2Radiology Department and Research Institute, Miami Children’s Hospital, Miami, FL 33155, USA 3Department of Psychology, Florida Atlantic University, Davie, FL 33314, USA Correspondence should be addressed to Alfredo Ardila; [email protected] Received 4 November 2014; Revised 9 December 2014; Accepted 17 December 2014 Academic Editor: Annalena Venneri Copyright © 2015 Alfredo Ardila et al. -
Effect of Parietal Lobe Lesions on Saccade Targeting and Spatial Memory in a Naturalistic Visual Search Task Steven S
Neuropsychologia 41 (2003) 1365–1386 Effect of parietal lobe lesions on saccade targeting and spatial memory in a naturalistic visual search task Steven S. Shimozaki a,∗, Mary M. Hayhoe a, Gregory J. Zelinsky b, Amy Weinstein c, William H. Merigan a, Dana H. Ballard a a Center for Visual Science, University of Rochester, Rochester, NY, USA b Department of Psychology, State University of New York, Stony Brook, NY, USA c Department of Neurology, Strong Memorial Hospital, University of Rochester, Rochester, NY, USA Received 8 November 2001; received in revised form 7 January 2003; accepted 7 January 2003 Abstract The eye movements of two patients with parietal lobe lesions and four normal observers were measured while they performed a visual search task with naturalistic objects. Patients were slower to perform the task than the normal observers, and the patients had more fixations per trial, longer latencies for the first saccade during the visual search, and less accurate first and second saccades to the target locations during the visual search. The increases in response times for the patients compared to the normal observers were best predicted by increases in the number of fixations. In order to investigate the effects of spatial memory on search performance, in some trials observers saw a preview of the search display. The patients appeared to have difficulty using previously viewed information, unlike normal observers who benefit from the preview. This suggests a spatial memory deficit. The patients’ deficits are consistent with the hypothesis that the parietal cortex has a role in the selection of targets for saccades, in memory for target location. -
Primary Progressive Aphasia and Kindred Disorders
Handbook of Clinical Neurology, Vol. 89 (3rd series) Dementias C. Duyckaerts, I. Litvan, Editors # 2008 Elsevier B.V. All rights reserved Primary progressive aphasias Chapter 54 Primary progressive aphasia and kindred disorders MARSEL MESULAM* AND SANDRA WEINTRAUB Cognitive Neurology and Alzheimer’s Disease Center, Northwestern University Feinberg School of Medicine, Chicago, USA 54.1. Introduction Bub, 1997; Kertesz et al., 2000, 2002; Hillis, 2002, 2004; Grossman and Moore, 2005). Terms such as The existence of progressive aphasias has been known progressive nonfluent aphasia (PNFA), semantic for more than 100 years. Pick (1892, 1904), Se´rieux dementia, aphasic variant of frontotemporal dementia (1893), Franceschi (1908), and Rosenfeld (1909) were (FTD), temporal variant of frontotemporal lobar among the first to report such patients. The current resur- degeneration (FTLD), Gogi aphasia and progressive gence of interest in this condition can be traced to a 1982 aphasia have been used, mostly implicitly, to denote report of six patients with a slowly progressive aphasia variants of PPA (Neary et al., 1998; Miller et al., and to the subsequent delineation of the primary progres- 1999). We prefer the PPA term as a root diagnosis sive aphasia (PPA) syndrome (Mesulam, 1982, 1987, for two reasons: not all progressive aphasias fulfill 2007; Mesulam and Weintraub, 1992). the PPA criteria and not all PPA cases are caused According to currently accepted criteria, the PPA by FTLD pathology. The word “primary” is a key diagnosis is made in any patient in whom a language descriptor that emphasizes the selective salience of impairment (aphasia), caused by a neurodegenerative the language disturbance and the relative preservation disease (progressive), constitutes the most salient aspect of other cognitive domains at initial stages. -
Chemoreception
Senses 5 SENSES live version • discussion • edit lesson • comment • report an error enses are the physiological methods of perception. The senses and their operation, classification, Sand theory are overlapping topics studied by a variety of fields. Sense is a faculty by which outside stimuli are perceived. We experience reality through our senses. A sense is a faculty by which outside stimuli are perceived. Many neurologists disagree about how many senses there actually are due to a broad interpretation of the definition of a sense. Our senses are split into two different groups. Our Exteroceptors detect stimulation from the outsides of our body. For example smell,taste,and equilibrium. The Interoceptors receive stimulation from the inside of our bodies. For instance, blood pressure dropping, changes in the gluclose and Ph levels. Children are generally taught that there are five senses (sight, hearing, touch, smell, taste). However, it is generally agreed that there are at least seven different senses in humans, and a minimum of two more observed in other organisms. Sense can also differ from one person to the next. Take taste for an example, what may taste great to me will taste awful to someone else. This all has to do with how our brains interpret the stimuli that is given. Chemoreception The senses of Gustation (taste) and Olfaction (smell) fall under the category of Chemoreception. Specialized cells act as receptors for certain chemical compounds. As these compounds react with the receptors, an impulse is sent to the brain and is registered as a certain taste or smell. Gustation and Olfaction are chemical senses because the receptors they contain are sensitive to the molecules in the food we eat, along with the air we breath. -
An Update on Semantic Dementia: Genetics, Imaging, and Pathology Ramon Landin-Romero1,2,3† , Rachel Tan1,2†, John R
Landin-Romero et al. Alzheimer's Research & Therapy (2016) 8:52 DOI 10.1186/s13195-016-0219-5 REVIEW Open Access An update on semantic dementia: genetics, imaging, and pathology Ramon Landin-Romero1,2,3† , Rachel Tan1,2†, John R. Hodges1,2,3 and Fiona Kumfor1,2,3* Abstract Progressive and relatively circumscribed loss of semantic knowledge, referred to as semantic dementia (SD) which falls under the broader umbrella of frontotemporal dementia, was officially identified as a clinical syndrome less than 50 years ago. Here, we review recent neuroimaging, pathological, and genetic research in SD. From a neuroimaging perspective, SD is characterised by hallmark asymmetrical atrophy of the anterior temporal pole and anterior fusiform gyrus, which is usually left lateralised. Functional magnetic resonance imaging (fMRI) studies have revealed widespread changes in connectivity, implicating the anterior temporal regions in semantic deficits in SD. Task-related fMRI have also demonstrated the relative preservation of frontal and parietal regions alongside preserved memory performance. In addition, recent longitudinal studies have demonstrated that, with disease progression, atrophy encroaches into the contralateral temporal pole and medial prefrontal cortices, which reflects emerging changes in behaviour and social cognition. Notably, unlike other frontotemporal dementia subtypes, recent research has demonstrated strong clinicopathological concordance in SD, with TDP43 type C as the most common pathological subtype. Moreover, an underlying genetic causeappearstoberelativelyrareinSD,withthemajorityof cases having a sporadic form of the disease. The relatively clear diagnosis, clinical course, and pathological homogeneity of SD make this syndrome a promising target for novel disease-modifying interventions. The development of neuroimaging markers of disease progression at the individual level is an important area of research for future studies to address, in order to assist with this endeavour. -
Prosopagnosia by B
J. Neurol. Neurosurg. Psychiat., 1959, 22, 124. PROSOPAGNOSIA BY B. BORNSTEIN and D. P. KIDRON From the Department of Neurology, Beilinson Hospital, Petah Tiqva, Israel "And what is the nature of this knowledge or recollection? I mean to ask, Whether a person, who having seen or heard or in any way perceived anything, knows not only that, but has a conception of something else which is the subject, not of the same but of some other kind of knowledge, may not be fairly said to recollect that of which he has the conception?" "And when the recollection is derived from like things, then another consideration is sure to arise, which is, Whether the likeness in any degree falls short or not of that which is recollected?" "The Philosophy of Plato " Phaedo (the Jowett translation). Does visual agnosia exist in a partial or isolated bances in sensation time, in adaptation time, in form, in which certain qualities only are affected, visual acuity, and in brightness discrimination. as opposed to generalized visual agnosia? Many Ettlinger (1956) rejected Bay's contentions. After workers cast doubt on this concept, maintaining analysing 30 cases of head injury, he showed that that partial visual agnosia is no more than a com- some patients had neither field nor perceptual bination of defects in vision, memory, and orienta- defects, others had field but not perceptual defects, tion, appearing together. and only in eight of the 30 patients were field and The clinical elucidation of partial visual agnosia perceptual defects found together. It is true that is likely to be affected by the patient's intellectual visual agnosia is frequently associated with homony- capacity, his mental state at the time of examination, mous hemianopsia, but despite this there are cases and his ability to cooperate without being influenced of hemianopsia without gnostic defects. -
What Is Semantic Dementia? a Cohort Study of Diagnostic Features and Clinical Boundaries
ORIGINAL CONTRIBUTION What Is Semantic Dementia? A Cohort Study of Diagnostic Features and Clinical Boundaries Andrew Kertesz, MD; Sarah Jesso, BA; Michal Harciarek, PhD; Mervin Blair, MA; Paul McMonagle, MD Objectives: To describe a large, clinically defined co- tions were frequent in SD (54.1%) but phonological er- hort of patients with semantic dementia (SD) that high- rors were absent, in contrast to progressive nonfluent lights important, sometimes overlooked features and to aphasia with the opposite pattern. All but 3 patients with compare it with similar entities. probable SD questioned the meaning of words. Patients with SD had significantly lower naming and comprehen- Design: Cohort study. sion scores, and their fluency was between progressive nonfluent aphasia and Alzheimer disease or behavioral Setting: A cognitive neurology clinic. frontotemporal dementia. Behavior was abnormal in 94.6% of patients with probable SD. Patients: A population of 48 patients clinically diag- nosed with SD was contrasted with 52 patients with pro- Conclusions: Semantic dementia is distinguishable from gressive nonfluent aphasia, 42 patients with a behav- other presentations of frontotemporal dementia and Alz- ioral variety of frontotemporal dementia, and 105 patients heimer disease, not only by fluent speech and impaired with Alzheimer disease on speech output characteris- tics, comprehension, naming, and repetition subtests of comprehension without loss of episodic memory, syn- the Western Aphasia Battery, the Frontal Behavioral In- tax, and phonology but also by empty, garrulous speech ventory, and other cognitive tests. Neuroimaging was vi- with thematic perseverations, semantic paraphasias, and sually analyzed, and 6 patients with SD had autopsy. poor category fluency. Questioning the meaning of words (eg, “What is steak?”) is an important diagnostic clue not Results: Of 37 patients with probable SD, 48.6% had se- seen in other groups, and behavior change is prevalent. -
Oxford Handbooks Online
Anomia and Anomic Aphasia Oxford Handbooks Online Anomia and Anomic Aphasia: Implications for Lexical Processing Stacy M. Harnish The Oxford Handbook of Aphasia and Language Disorders (Forthcoming) Edited by Anastasia M. Raymer and Leslie Gonzalez-Rothi Subject: Psychology, Cognitive Neuroscience Online Publication Date: Jan DOI: 10.1093/oxfordhb/9780199772391.013.7 2015 Abstract and Keywords Anomia is a term that describes the inability to retrieve a desired word, and is the most common deficit present across different aphasia syndromes. Anomic aphasia is a specific aphasia syndrome characterized by a primary deficit of word retrieval with relatively spared performance in other language domains, such as auditory comprehension and sentence production. Damage to a number of cognitive and motor systems can produce errors in word retrieval tasks, only subsets of which are language deficits. In the cognitive and neuropsychological underpinnings section, we discuss the major processing steps that occur in lexical retrieval and outline how deficits at each of the stages may produce anomia. The neuroanatomical correlates section will include a review of lesion and neuroimaging studies of language processing to examine anomia and anomia recovery in the acute and chronic stages. The assessment section will highlight how discrepancies in performance between tasks contrasting output modes and input modalities may provide insight into the locus of impairment in anomia. Finally, the treatment section will outline some of the rehabilitation techniques for forms of anomia, and take a closer look at the evidence base for different aspects of treatment. Keywords: Anomia, Anomic aphasia, Word retrieval, Lexical processing Syndrome Description and Unique Characteristics The term anomia refers to the inability to retrieve a desired word, typically in the course of conversational sentence production. -
Semantic Dementia
cortex xxx (2012) 1e10 Available online at www.sciencedirect.com Journal homepage: www.elsevier.com/locate/cortex Research report Bringing words back to mind e Improving word production in semantic dementia Sharon A. Savage a,b, Kirrie J. Ballard c, Olivier Piguet a,b and John R. Hodges a,b,* a Neuroscience Research Australia, Sydney, Australia b Faculty of Medicine, School of Medical Sciences, University of New South Wales, Sydney, Australia c Faculty of Health Sciences, Speech Pathology, University of Sydney, Australia article info abstract Article history: Patients with semantic dementia (SD) have significant impairments in naming and Received 28 February 2012 comprehension, but demonstrate relatively intact attention, everyday memory, and Reviewed 21 June 2012 visuospatial skills. Given these preserved skills, attempts have been made to help re-build Revised 25 June 2012 vocabulary in SD patients, with promising results. Such reports, however, are generally Accepted 19 September 2012 based upon only one or two cases and have employed variable retraining methods. It is Action editor Mike Kopelman thus unclear which elements of practice are crucial to success. Over two studies, we Published online xxx assessed four patients undergoing a word training program, who ranged in severity from mild to severe impairments to semantic knowledge. All four participants showed Keywords: significant improvements in their ability to name trained items, with no changes in Semantic dementia untrained items over the same time period. Improvements were evident within 3 weeks of Cognitive training practice, and could be established from a simple, repetitive practice of word-picture Naming pairing, carried out at the participant’s home. -
Visual Problems After Brain Injury
Visual problems after brain injury As a charity, we rely on donations from people like you to continue providing free information to people affected by brain injury. Donate today: www.headway.org.uk/donate Introduction Vision is the skill that allows us to see the world around us. When we look at the world, a complex series of processes takes place between the eyes and the brain. The eyes take in the information, while the brain (which is connected to the eyes by a nerve called the optic nerve) is responsible for processing and interpreting it. Through this system we are able to see things such as colours, shapes, movement, objects and people. When the brain is injured, the ability to interpret visual information can be affected in different ways. This factsheet has been written to explain how brain injury can affect vision and how to seek professional support with these issues. Tips for coping with visual problems are also offered. Words in bold are defined in a glossary at the end of the factsheet. What is vision? There are lots of different aspects of vision. Some of the things the brain needs to do to decode information that it receives from the eyes are: • process the shape and colour of objects • process and merge information received from both eyes • recall information from memory to recognise objects or places • process the movement of objects • process the location and position of an object in space • process information across the visual field (including peripheral vision) Generally, different parts of the brain are responsible for processing these different aspects of vision. -
Visuoconstructional Impairment: What Are We Assessing, and How Are We Assessing It?
University of Rhode Island DigitalCommons@URI Open Access Dissertations 2004 Visuoconstructional Impairment: What Are We Assessing, and How Are We Assessing It? Jessica Somerville Ruffalo University of Rhode Island Follow this and additional works at: https://digitalcommons.uri.edu/oa_diss Recommended Citation Somerville Ruffalo, Jessica, "Visuoconstructional Impairment: What Are We Assessing, and How Are We Assessing It?" (2004). Open Access Dissertations. Paper 381. https://digitalcommons.uri.edu/oa_diss/381 This Dissertation is brought to you for free and open access by DigitalCommons@URI. It has been accepted for inclusion in Open Access Dissertations by an authorized administrator of DigitalCommons@URI. For more information, please contact [email protected]. ... VISUOCONSTRUCTIONAL IMPAIRMENT: WHAT ARE WE ASSESSING, AND HOW ARE WE ASSESSING IT? BY JESSICA SOMERVILLE RUFFOLO A DISSERTATION SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PIDLOSOPHY IN PSYCHOLOGY THE UNIVERSITY OF RHODE ISLAND 2004 DOCTOR OF PHILOSOPHY DISSERTATON OF JESSICA SOMERVILLE RUFFOLO APPROVED: DEAN OF THE GRADUATE SCHOOL UNIVERSITY OF RHODE ISLAND 2004 ABSTRACT Visuoconstruction (VC) is a commonly-assessed neuropsychological domain that involves the ability to organize and manually manipulate spatial information to make a design. Tests used to measure VC are considered multifactorial in nature given their multiple demands (e.g., visuospatial, executive, motor), and therefore, interpretation of VC impairment can be difficult. Additionally, a wide variety of tests and methods are used to measure VC, further complicating interpretation of results. Although clinicians and researchers spend a great deal of time studying "VC," there has been much confusion about what it is, what is being measured, and how to best measure it. -
Disorders of the Visual System in Alzheimer's Disease
© 1990 Raven Press, Ltd.. New York Disorders of the Visual System in Alzheimer's Disease Mario F. Mendez, M.D., Robert L. Tomsak, M.D., Ph.D., and Bernd Remler, M.D. Alzheimer's disease (AD) is associated with distur Alzheimer's disease (AD) is the most prevalent bances in basic visual, complex visual, and oculomotor form of dementia affecting greater than 2.5 million functions. The broad range of visual system disorders in AD may result from the concentration of neuropathol people in the U.S., with the numbers expected to ogy in visual association cortex and optic nerves in this double by the year 2040 (1). Despite the absence of disease. AD patients and their caregivers frequently re a clinical test for AD, the recent establishment of port visuospatial difficulties in these patients. Examina highly accurate clinical criteria permit a more pre tion of the visual system in AD may reveal visual field cise evaluation of the deficits associated with this deficits, prolonged visual evoked potentials, depressed contrast sensitivities, and abnormal eye movement re disorder (2-4) (see Table 1). In addition to the cordings. Complex visual disturbances include construc usual memory and other cognitive deficits, AD pa tional and visuoperceptual abnormalities, spatial agno tients have disturbances in basic visual, complex sia and Balint's syndrome, environmental disorienta visual, and oculomotor functions, and AD patients tion, visual agnosia, facial identification problems, and in greater numbers are undergoing more thorough visual hallucinations. The purpose of this article is to review the spectrum of visual system disturbances evaluations of their visual systems (4-8).