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Psychogenic and Organic Amnesia. a Multidimensional Assessment of Clinical, Neuroradiological, Neuropsychological and Psychopathological Features
Behavioural Neurology 18 (2007) 53–64 53 IOS Press Psychogenic and organic amnesia. A multidimensional assessment of clinical, neuroradiological, neuropsychological and psychopathological features Laura Serraa,∗, Lucia Faddaa,b, Ivana Buccionea, Carlo Caltagironea,b and Giovanni A. Carlesimoa,b aFondazione IRCCS Santa Lucia, Roma, Italy bClinica Neurologica, Universita` Tor Vergata, Roma, Italy Abstract. Psychogenic amnesia is a complex disorder characterised by a wide variety of symptoms. Consequently, in a number of cases it is difficult distinguish it from organic memory impairment. The present study reports a new case of global psychogenic amnesia compared with two patients with amnesia underlain by organic brain damage. Our aim was to identify features useful for distinguishing between psychogenic and organic forms of memory impairment. The findings show the usefulness of a multidimensional evaluation of clinical, neuroradiological, neuropsychological and psychopathological aspects, to provide convergent findings useful for differentiating the two forms of memory disorder. Keywords: Amnesia, psychogenic origin, organic origin 1. Introduction ness of the self – and a period of wandering. According to Kopelman [33], there are three main predisposing Psychogenic or dissociative amnesia (DSM-IV- factors for global psychogenic amnesia: i) a history of TR) [1] is a clinical syndrome characterised by a mem- transient, organic amnesia due to epilepsy [52], head ory disorder of nonorganic origin. Following Kopel- injury [4] or alcoholic blackouts [20]; ii) a history of man [31,33], psychogenic amnesia can either be sit- psychiatric disorders such as depressed mood, and iii) uation specific or global. Situation specific amnesia a severe precipitating stress, such as marital or emo- refers to memory loss for a particular incident or part tional discord [23], bereavement [49], financial prob- of an incident and can arise in a variety of circum- lems [23] or war [21,48]. -
The Wandering Mind What the Brain Does When You Are Not Looking the University of Chicago Press, Chicago 2015, Pp
Michael C. Corballis The Wandering Mind What the Brain Does When You are Not Looking The University of Chicago Press, Chicago 2015, pp. 184 It is commonplace to consider mind-wandering as a secondary, useless ac- tivity of our mind to which we guiltily abandon ourselves for laziness or dis- traction. The aim of the book is to show that, far from being the slaves of a blamable indolence, every time we are absent-minded or lost in thought, we are involved in an essential mental activity. Not only is mind-wandering a funda- mental component of our life (whether we want it or not, our mind meanders at night and for half the time during the day), but it also has a constructive and adaptive function that is crucial for facing the contingencies of a complex world. Without a wandering mind we would be stuck in the present, unable to invent stories and to escape the here and now through mental time travel. Mind-wandering takes us into unexplored regions of the unconscious mind that are inaccessible to the conscious will. Not only does this capacity allows us to build and consolidate the sense of our personality but it also helps to multiply our self into imagined possible selves and to expand the range of our experience. Creativity, too, lies in the randomness of mind-wandering, which makes possible unpredictable connections of ideas. The book therefore takes into account different forms of mind-wandering. Mental traveling depends on memory, which provides the material that feeds our imagination. Memory is so important to mind-wandering that some syn- dromes, such as amnesia and hyperthymesia, can impair the ability to mind- travel. -
What Is It Like to Be Confabulating?
What is it like to be Confabulating? Sahba Besharati, Aikaterini Fotopoulou and Michael D. Kopelman Kings College London, Institute of Psychiatry, London UK Different kinds of confabulations may arise in neurological and psychiatric disorders. This chapter first offers conceptual distinctions between spontaneous and momentary (“provoked”) confabulations, as well as between these types of confabulation and other kinds of false memories. The chapter then reviews current explanatory theories, emphasizing that both neurocognitive and motivational factors account for the content of confabulations. We place particular emphasis on a general model of confabulation that considers cognitive dysfunctions in memory and executive functioning in parallel with social and emotional factors. It is argued that all these dimensions need to be taken into account for a phenomenologically rich description of confabulation. The role of the motivated content of confabulation and the subjective experience of the patient are particularly relevant in effective management and rehabilitation strategies. Finally, we discuss a case example in order to illustrate how seemingly meaningless false memories are actually meaningful if placed in the context of the patient’s own perspective and autobiographical memory. Key words: Confabulation; False memory; Motivation; Self; Rehabilitation. 1 Memory is often subject to errors of omission and commission such that recollection includes instances of forgetting, or distorting past experience. The study of pathological forms of exaggerated memory distortion has provided useful insights into the mechanisms of normal reconstructive remembering (Johnson, 1991; Kopelman, 1999; Schacter, Norman & Kotstall, 1998). An extreme form of pathological memory distortion is confabulation. Different variants of confabulation are found to arise in neurological and psychiatric disorders. -
How the Brain and Memory Works 10
Caring For A Loved One With Dementia 10 How the Brain and Memory Works Introduction The way our brain stores memories is a complex process across many areas of the brain. Luckily, memories are not all stored in one place. They are spread out across different brain regions, or lobes, and allow us to keep and recall memories even if one area of the brain is damaged. Although the brain’s process for storing memories is sometimes compared to a filing cabinet, the processes are extremely complex and still not fully understood. 2 Creating memories 3. Store information The human brain is made up of neurons. Neurons are nerve cells that talk to each other through a synapse- a connection This is the process of retaining the information in short term, or between cells that sends information. Neurons receive and more permanently in long term memory. An area of the brain carry information to the parts of the brain to process or store called the Hippocampus plays an important role in storing long information. The brain has approximately 100 billion nerve term memories. cells, give or take 15 billion. 4. Recall To create memories, the brain must accomplish the following processes: Memories that are frequently recalled become stronger than those accessed less frequently. The neurons linked to this 1. Encode information information create a neural pathway- a road to that memory. Think of it as walking along a path. The more frequently you This process allows something of interest to be stored in the walk on the same path, the more defined the trail becomes. -
Memory-Modulation: Self-Improvement Or Self-Depletion?
HYPOTHESIS AND THEORY published: 05 April 2018 doi: 10.3389/fpsyg.2018.00469 Memory-Modulation: Self-Improvement or Self-Depletion? Andrea Lavazza* Neuroethics, Centro Universitario Internazionale, Arezzo, Italy Autobiographical memory is fundamental to the process of self-construction. Therefore, the possibility of modifying autobiographical memories, in particular with memory-modulation and memory-erasing, is a very important topic both from the theoretical and from the practical point of view. The aim of this paper is to illustrate the state of the art of some of the most promising areas of memory-modulation and memory-erasing, considering how they can affect the self and the overall balance of the “self and autobiographical memory” system. Indeed, different conceptualizations of the self and of personal identity in relation to autobiographical memory are what makes memory-modulation and memory-erasing more or less desirable. Because of the current limitations (both practical and ethical) to interventions on memory, I can Edited by: only sketch some hypotheses. However, it can be argued that the choice to mitigate Rossella Guerini, painful memories (or edit memories for other reasons) is somehow problematic, from an Università degli Studi Roma Tre, Italy ethical point of view, according to some of the theories of the self and personal identity Reviewed by: in relation to autobiographical memory, in particular for the so-called narrative theories Tillmann Vierkant, University of Edinburgh, of personal identity, chosen here as the main case of study. Other conceptualizations of United Kingdom the “self and autobiographical memory” system, namely the constructivist theories, do Antonella Marchetti, Università Cattolica del Sacro Cuore, not have this sort of critical concerns. -
Metamemory and Memory Discrepancies in Directed Forgetting of Emotional Information
Research Reports Metamemory and Memory Discrepancies in Directed Forgetting of Emotional Information Dicle Çapan a, Simay Ikier b [a] Department of Psychology, Koç University, Istanbul, Turkey. [b] Department of Psychology, Bahçeşehir University, Istanbul, Turkey. Europe's Journal of Psychology, 2021, Vol. 17(1), 44–52, https://doi.org/10.5964/ejop.2567 Received: 2019-12-17 • Accepted: 2020-04-23 • Published (VoR): 2021-02-26 Handling Editor: Rhian Worth, University of South Wales, Pontypridd, United Kingdom Corresponding Author: Dicle Çapan, Koç University, Rumelifeneri Mahallesi, Sarıyer Rumeli Feneri Yolu, 34450 Sarıyer Istanbul, Turkey. E-mail: [email protected] Abstract Directed Forgetting (DF) studies show that it is possible to exert cognitive control to intentionally forget information. The aim of the present study was to investigate how aware individuals are of the control they have over what they remember and forget when the information is emotional. Participants were presented with positive, negative and neutral photographs, and each photograph was followed by either a Remember or a Forget instruction. Then, for each photograph, participants provided Judgments of Learning (JOLs) by indicating their likelihood of recognizing that item on a subsequent test. In the recognition phase, participants were asked to indicate all old items, irrespective of instruction. Remember items had higher JOLs than Forget items for all item types, indicating that participants believe they can intentionally forget even emotional information—which is not the case based on the actual recognition results. DF effect, which was calculated by subtracting recognition for Forget items from Remember ones was only significant for neutral items. Emotional information disrupted cognitive control, eliminating the DF effect. -
DO AMNESICS EXHIBIT COGNITIVE DISSONANCE REDUCTION? the Role of Explicit Memory and Attention in Attitude Change Matthew D
PSYCHOLOGICAL SCIENCE Research Article DO AMNESICS EXHIBIT COGNITIVE DISSONANCE REDUCTION? The Role of Explicit Memory and Attention in Attitude Change Matthew D. Lieberman, Kevin N. Ochsner, Daniel T. Gilbert, and Daniel L. Schacter Harvard University Abstract—In two studies, we investigated the roles of explicit mem- CONSCIOUS CONTENT: THE ROLE OF ory and attentional resources in the process of behavior-induced atti- EXPLICIT MEMORY tude change. Although most theories of attitude change (cognitive Explicit memory refers to one’s ability to consciously recollect dissonance and self-perception theories) assume an important role for past events, behaviors, and experiences (Schacter, Chiu, & Ochsner, both mechanisms, we propose that behavior-induced attitude change 1993) and thus is a central component of most social abilities. Indeed, can be a relatively automatic process that does not require explicit people’s memory for the identities and actions of other people and memory for, or consciously controlled processing of, the discrepancy themselves forms the adhesive that gives them a continuing sense of between attitude and behavior. Using a free-choice paradigm, we place in their social world. Revising personal attitudes and beliefs in found that both amnesics and normal participants under cognitive response to a counterattitudinal behavior naturally seems to depend on load showed as much attitude change as did control participants. retrospective capacities. If Aesop’s forlorn lover of grapes could not remember that the grapes were out of reach, he would have no reason A fox saw some ripe black grapes hanging from a trellised vine. He resorted to to persuade himself of their reduced quality. -
Primary and Secondary Prevention Interventions for Cognitive Decline
2016 Primary and secondary prevention interventions for cognitive decline and dementia Overview of reviews Published by The Norwegian Institute of Public Health Section for evidence summaries in the Knowledge Centre Title Primary and secondary prevention interventions for cognitive decline and dementia Norwegian title Primær‐ og sekundærforebyggende tiltak for kognitiv svikt og demens Responsible Camilla Stoltenberg, direktør Authors Gerd M Flodgren, project leader, researcher, the Knowledge Centre Rigmor C Berg, Head of Unit, for Social Welfare Research at the Knowledge Centre ISBN 978‐82‐8082‐745‐6 Projectnumber 798 Type of publication Overview of reviews No of pages 69 (110 inklusiv vedlegg) Client Nasjonalforeningen for folkehelsen MeSH terms Alzheimer’s disease, dementia, cognition, cognitive impairment, cognitive disorders, memory complaints, primary prevention, secondary prevention Citation Flodgren GM, Berg RC. Primary and secondary prevention interventions for cognitive decline and dementia. [Primær‐ og sekundærforebyggende tiltak for kognitiv svikt og demens] Rapport −2016. Oslo: Folkehelseinstituttet, 2016. 2 Table of contents Table of contents TABLE OF CONTENTS 3 KEY MESSAGES 5 EXECUTIVE SUMMARY 6 Background 6 Objectives 6 Methods 6 Results 6 Discussion 8 Conclusions 8 HOVEDFUNN (NORSK) 9 SAMMENDRAG (NORSK) 10 Bakgrunn 10 Problemstillinger 10 Metoder 10 Resultat 10 Diskusjon 12 Konklusjon 12 PREFACE 13 OBJECTIVES 15 BACKGROUND 16 Description of the condition 16 How the interventions may work 18 Why is it important to do this -
Effect of Phosphatidylserine Administration on Symptoms of Attention-Deficit/Hyperactivity Disorder in Children S
AGRO SET_OTT_06.qxp 27-10-2006 10:14 Pagina 16 Effect of phosphatidylserine administration on symptoms of attention-deficit/hyperactivity disorder in children S. HIRAYAMA1*,Y. MASUDA2,R. RABELER3 *Corresponding author 1. Department of Early Childhood Education and Care, Kurashiki City College, 160 Hieda, Kurashikishi, Okayama, Japan 2. Kojima first High School, Okayama, Japan 3. Cargill Food Ingredients GmbH, Freising, Germany PURPOSE the emotional response in the frontal lobe, due to a problem of disinhibition (1). Disinhibition consists of disinhibition of To clarify whether the administration of phosphatidylserine attention (inattention) and that of behaviour (hyperactivity ("PS") can improve the attention-deficit ("AD") and and impulsiveness). hyperactivity disorder ("HD") symptoms in children. with AD/HD patients are classified into inattention-predominant Infant nutrition AD/HD. type, hyperactivity and impulsiveness -dominant type and mixed type. Each symptom causes problems in learning and relation between family members. Though the cause of STUDY DESIGN AND SUBJECTS disorders has yet to be identified (2), central stimulants (a type of psycho stimulant) are used in the treatment. These A pilot study in 15 AD/HD children 6 to 12 years old (including drugs can alleviate the AD/HD symptoms to some extent (3, 6 suspected to have AD/HD) who had rarely received 4). However, there is no consensus on the long term use of medication before. These 15 children took 200 mg/day of PS these drugs and adverse events (adverse reactions) may in a capsule every day for 2 months. The following items were occur during or years after the treatment (5). Accordingly, investigated at the start of study ("pre-study") and upon supplementary and substitute medication is frequently completion of study ("post-study): 1) AD/HD symptoms advised. -
Cognitive Functions of the Brain: Perception, Attention and Memory
IFM LAB TUTORIAL SERIES # 6, COPYRIGHT c IFM LAB Cognitive Functions of the Brain: Perception, Attention and Memory Jiawei Zhang [email protected] Founder and Director Information Fusion and Mining Laboratory (First Version: May 2019; Revision: May 2019.) Abstract This is a follow-up tutorial article of [17] and [16], in this paper, we will introduce several important cognitive functions of the brain. Brain cognitive functions are the mental processes that allow us to receive, select, store, transform, develop, and recover information that we've received from external stimuli. This process allows us to understand and to relate to the world more effectively. Cognitive functions are brain-based skills we need to carry out any task from the simplest to the most complex. They are related with the mechanisms of how we learn, remember, problem-solve, and pay attention, etc. To be more specific, in this paper, we will talk about the perception, attention and memory functions of the human brain. Several other brain cognitive functions, e.g., arousal, decision making, natural language, motor coordination, planning, problem solving and thinking, will be added to this paper in the later versions, respectively. Many of the materials used in this paper are from wikipedia and several other neuroscience introductory articles, which will be properly cited in this paper. This is the last of the three tutorial articles about the brain. The readers are suggested to read this paper after the previous two tutorial articles on brain structure and functions [17] as well as the brain basic neural units [16]. Keywords: The Brain; Cognitive Function; Consciousness; Attention; Learning; Memory Contents 1 Introduction 2 2 Perception 3 2.1 Detailed Process of Perception . -
The Three Amnesias
The Three Amnesias Russell M. Bauer, Ph.D. Department of Clinical and Health Psychology College of Public Health and Health Professions Evelyn F. and William L. McKnight Brain Institute University of Florida PO Box 100165 HSC Gainesville, FL 32610-0165 USA Bauer, R.M. (in press). The Three Amnesias. In J. Morgan and J.E. Ricker (Eds.), Textbook of Clinical Neuropsychology. Philadelphia: Taylor & Francis/Psychology Press. The Three Amnesias - 2 During the past five decades, our understanding of memory and its disorders has increased dramatically. In 1950, very little was known about the localization of brain lesions causing amnesia. Despite a few clues in earlier literature, it came as a complete surprise in the early 1950’s that bilateral medial temporal resection caused amnesia. The importance of the thalamus in memory was hardly suspected until the 1970’s and the basal forebrain was an area virtually unknown to clinicians before the 1980’s. An animal model of the amnesic syndrome was not developed until the 1970’s. The famous case of Henry M. (H.M.), published by Scoville and Milner (1957), marked the beginning of what has been called the “golden age of memory”. Since that time, experimental analyses of amnesic patients, coupled with meticulous clinical description, pathological analysis, and, more recently, structural and functional imaging, has led to a clearer understanding of the nature and characteristics of the human amnesic syndrome. The amnesic syndrome does not affect all kinds of memory, and, conversely, memory disordered patients without full-blown amnesia (e.g., patients with frontal lesions) may have impairment in those cognitive processes that normally support remembering. -
Hyper Memory, Synaesthesia, Savants Luria and Borges Revisited
Dement Neuropsychol 2018 June;12(2):101-104 Views & Reviews http://dx.doi.org/10.1590/1980-57642018dn12-020001 Hyper memory, synaesthesia, savants Luria and Borges revisited Luis Fornazzari1, Melissa Leggieri2, Tom A. Schweizer3, Raul L. Arizaga4, Ricardo F. Allegri5, Corinne E. Fischer6 ABSTRACT. In this paper, we investigated two subjects with superior memory, or hyper memory: Solomon Shereshevsky, who was followed clinically for years by A. R. Luria, and Funes the Memorious, a fictional character created by J. L. Borges. The subjects possessed hyper memory, synaesthesia and symptoms of what we now call autistic spectrum disorder (ASD). We will discuss interactions of these characteristics and their possible role in hyper memory. Our study suggests that the hyper memory in our synaesthetes may have been due to their ASD-savant syndrome characteristics. However, this talent was markedly diminished by their severe deficit in categorization, abstraction and metaphorical functions. As investigated by previous studies, we suggest that there is altered connectivity between the medial temporal lobe and its connections to the prefrontal cingulate and amygdala, either due to lack of specific neurons or to a more general neuronal dysfunction. Key words: memory, hyper memory, savantism, synaesthesia, autistic spectrum disorder, Solomon Shereshevsky, Funes the memorious. HIPERMEMÓRIA, SINESTESIA, SAVANTS: LURIA E BORGES REVISITADOS RESUMO. Neste artigo, investigamos dois sujeitos com memória superior ou hipermemória: Solomon Shereshevsky, que foi seguido clinicamente por anos por A. R. Luria, e Funes o memorioso, um personagem fictício criado por J. L. Borges. Os sujeitos possuem hipermemória, sinestesia e sintomas do que hoje chamamos de transtorno do espectro autista (TEA).