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Auditory hallucination AND memory

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https://www.readbyqxmd.com/read/29089190/speech-illusions-and-working-memory-performance-in-non-clinical-psychosis
#1
Tina Gupta, Jordan E DeVylder, Randy P Auerbach, Jason Schiffman, Vijay A Mittal
Psychotic disorders are characterized by auditory verbal hallucinations (AVHs), and research has shown that AVHs are linked to deficits in working memory. Our understanding of AVHs across the psychosis continuum is limited. To date, little research has tested whether hallucination proneness (HP) is linked with abnormalities on experimental multispeaker babble tasks. Few investigations have been conducted to determine how task performance might be linked to cognitive functioning. The objective of the current study is to better understand this empirical gap...
October 28, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28864916/effects-of-transcranial-direct-current-stimulation-on-the-auditory-mismatch-negativity-response-and-working-memory-performance-in-schizophrenia-a-pilot-study
#2
Danielle Impey, Ashley Baddeley, Renee Nelson, Alain Labelle, Verner Knott
Cognitive impairment has been proposed to be the core feature of schizophrenia (Sz). Transcranial direct current stimulation (tDCS) is a non-invasive form of brain stimulation which can improve cognitive function in healthy participants and in psychiatric patients with cognitive deficits. tDCS has been shown to improve cognition and hallucination symptoms in Sz, a disorder also associated with marked sensory processing deficits. Recent findings in healthy controls demonstrate that anodal tDCS increases auditory deviance detection, as measured by the brain-based event-related potential, mismatch negativity (MMN), which is a putative biomarker of Sz that has been proposed as a target for treatment of Sz cognition...
November 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28562181/working-memory-predicts-presence-of-auditory-verbal-hallucinations-in-schizophrenia-and-bipolar-disorder-with-psychosis
#3
Lisanne M Jenkins, Anjuli S Bodapati, Rajiv P Sharma, Cherise Rosen
OBJECTIVE: The recent dramatic increase in research investigating auditory verbal hallucinations (AVHs) has broadened the former narrow focus on schizophrenia to incorporate additional populations that experience these symptoms. However, an understanding of potential shared mechanisms remains elusive. Based on theories suggesting a failure of top-down cognitive control, we aimed to compare the relationship between AVHs and cognition in two categorical diagnoses of psychosis, schizophrenia and psychotic bipolar disorder...
May 31, 2017: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/28314070/long-lasting-effects-of-chronic-heavy-cannabis-abuse
#4
Joannis N Nestoros, Elena Vakonaki, Manolis N Tzatzarakis, Athanasios Alegakis, Markos D Skondras, Aristidis M Tsatsakis
BACKGROUND AND OBJECTIVES: The purpose of this study was to evaluate the extent of short-term memory impairment and schizophrenia-like symptoms in heavy and systematic cannabis users and the association between the severity of abuse and the longevity of its persistent symptoms after refraining from such use. METHODS: A complete psychiatric examination and a psychometric evaluation were performed in 48 solely cannabis users. Additionally, head hair samples were analyzed and the detected cannabinoids levels were correlated with the psychometric findings...
June 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28224285/abnormal-effective-connectivity-in-the-brain-is-involved-in-auditory-verbal-hallucinations-in-schizophrenia
#5
Baojuan Li, Long-Biao Cui, Yi-Bin Xi, Karl J Friston, Fan Guo, Hua-Ning Wang, Lin-Chuan Zhang, Yuan-Han Bai, Qing-Rong Tan, Hong Yin, Hongbing Lu
Information flow among auditory and language processing-related regions implicated in the pathophysiology of auditory verbal hallucinations (AVHs) in schizophrenia (SZ) remains unclear. In this study, we used stochastic dynamic causal modeling (sDCM) to quantify connections among the left dorsolateral prefrontal cortex (inner speech monitoring), auditory cortex (auditory processing), hippocampus (memory retrieval), thalamus (information filtering), and Broca's area (language production) in 17 first-episode drug-naïve SZ patients with AVHs, 15 without AVHs, and 19 healthy controls using resting-state functional magnetic resonance imaging...
June 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28167329/the-role-of-set-shifting-in-auditory-verbal-hallucinations
#6
Sara Siddi, Donatella Rita Petretto, Caterina Burrai, Rosanna Scanu, Antonella Baita, Pierfranco Trincas, Emanuela Trogu, Liliana Campus, Augusto Contu, Antonio Preti
BACKGROUND: Auditory verbal hallucinations (AVHs) are a cardinal characteristic of psychosis. Recent research on the neuropsychological mechanism of AVHs has focused on source monitoring failure, but a few studies have suggested the involvement of attention, working memory, processing speed, verbal learning, memory, and executive functions. In this study we examined the neuropsychological profile of patients with AVHs, assuming that the mechanism underlying this symptom could be a dysfunction of specific cognitive domains...
April 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/27890810/interaction-of-language-auditory-and-memory-brain-networks-in-auditory-verbal-hallucinations
#7
REVIEW
Branislava Ćurčić-Blake, Judith M Ford, Daniela Hubl, Natasza D Orlov, Iris E Sommer, Flavie Waters, Paul Allen, Renaud Jardri, Peter W Woodruff, Olivier David, Christoph Mulert, Todd S Woodward, André Aleman
Auditory verbal hallucinations (AVH) occur in psychotic disorders, but also as a symptom of other conditions and even in healthy people. Several current theories on the origin of AVH converge, with neuroimaging studies suggesting that the language, auditory and memory/limbic networks are of particular relevance. However, reconciliation of these theories with experimental evidence is missing. We review 50 studies investigating functional (EEG and fMRI) and anatomic (diffusion tensor imaging) connectivity in these networks, and explore the evidence supporting abnormal connectivity in these networks associated with AVH...
January 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/27842736/-multidimensionality-of-inner-speech-and-its-relationship-with-abnormal-perceptions
#8
William Tamayo-Agudelo, Juan David Vélez-Urrego, Gilberto Gaviria-Castaño, Salvador Perona-Garcelán
BACKGROUND: Inner speech is a common human experience. Recently, there have been studies linking this experience with cognitive functions, such as problem solving, reading, writing, autobiographical memory, and some disorders, such as anxiety and depression. In addition, inner speech is recognised as the main source of auditory hallucinations. OBJECTIVES: The main purpose of this study is to establish the factor structure of Varieties of Inner Speech Questionnaire (VISQ) in a sample of the Colombian population...
October 2016: Revista Colombiana de Psiquiatría
https://www.readbyqxmd.com/read/27690132/deficits-in-metaphor-but-not-in-idiomatic-processing-are-related-to-verbal-hallucinations-in-patients-with-psychosis
#9
Sara Siddi, Donatella Rita Petretto, Rosanna Scanu, Caterina Burrai, Antonella Baita, Pierfranco Trincas, Emanuela Trogu, Liliana Campus, Augusto Contu, Antonio Preti
There is scant evidence that the verbal cognitive deficits observed in patients with psychosis are related to auditory verbal hallucinations. The understanding of metaphors and idiomatic expressions was investigated in a cohort of 90 patients with active psychosis, and in 44 healthy controls. The Psychotic Symptom Rating Scales (PSYRATS: verbal hallucinations subscale) was used to measure the current verbal hallucinations episode; a subscore of the Launay-Slade Hallucination Scale was used to measure long-term propensity to auditory verbal hallucination-like experiences (HLEs) in the sample...
December 30, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27683568/impaired-self-monitoring-of-inner-speech-in-schizophrenia-patients-with-verbal-hallucinations-and-in-non-clinical-individuals-prone-to-hallucinations
#10
Gildas Brébion, Christian Stephan-Otto, Susana Ochoa, Mercedes Roca, Lourdes Nieto, Judith Usall
BACKGROUND: Previous research has shown that various memory errors reflecting failure in the self-monitoring of speech were associated with auditory/verbal hallucinations in schizophrenia patients and with proneness to hallucinations in non-clinical individuals. METHOD: We administered to 57 schizophrenia patients and 60 healthy participants a verbal memory task involving free recall and recognition of lists of words with different structures (high-frequency, low-frequency, and semantically organisable words)...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27473935/the-neural-mechanisms-of-hallucinations-a-quantitative-meta-analysis-of-neuroimaging-studies
#11
REVIEW
Leor Zmigrod, Jane R Garrison, Joseph Carr, Jon S Simons
Activation likelihood estimation meta-analysis of functional neuroimaging data was used to investigate the neural mechanisms underlying auditory-verbal and visual hallucinations (AVHs and VHs). Consistent activation across studies during AVHs, but not VHs, in Wernicke's and Broca's areas is consistent with involvement of speech and language processes in the experience of hearing voices when none are present. Similarly, greater activity in auditory cortex during AVHs and in visual cortex during VHs supports models proposing over-stimulation of sensory cortices in the generation of these perceptual anomalies...
October 2016: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/27460616/psychological-mechanisms-mediating-effects-between-trauma-and-psychotic-symptoms-the-role-of-affect-regulation-intrusive-trauma-memory-beliefs-and-depression
#12
RANDOMIZED CONTROLLED TRIAL
Amy Hardy, Richard Emsley, Daniel Freeman, Paul Bebbington, Philippa A Garety, Elizabeth E Kuipers, Graham Dunn, David Fowler
Evidence suggests a causal role for trauma in psychosis, particularly for childhood victimization. However, the establishment of underlying trauma-related mechanisms would strengthen the causal argument. In a sample of people with relapsing psychosis (n = 228), we tested hypothesized mechanisms specifically related to impaired affect regulation, intrusive trauma memory, beliefs, and depression. The majority of participants (74.1%) reported victimization trauma, and a fifth (21.5%) met symptomatic criteria for Posttraumatic Stress Disorder...
July 2016: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/27444616/monitoring-what-is-real-the-effects-of-modality-and-action-on-accuracy-and-type-of-reality-monitoring-error
#13
Jane R Garrison, Rebecca Bond, Emma Gibbard, Marcia K Johnson, Jon S Simons
Reality monitoring refers to processes involved in distinguishing internally generated information from information presented in the external world, an activity thought to be based, in part, on assessment of activated features such as the amount and type of cognitive operations and perceptual content. Impairment in reality monitoring has been implicated in symptoms of mental illness and associated more widely with the occurrence of anomalous perceptions as well as false memories and beliefs. In the present experiment, the cognitive mechanisms of reality monitoring were probed in healthy individuals using a task that investigated the effects of stimulus modality (auditory vs visual) and the type of action undertaken during encoding (thought vs speech) on subsequent source memory...
February 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27161220/vasculitis-cerebral-infarction-and-persistent-bartonella-henselae-infection-in-a-child
#14
Nandhakumar Balakrishnan, Marna Ericson, Ricardo Maggi, Edward B Breitschwerdt
BACKGROUND: The genus Bartonella is comprised of a rapidly increasing number of pathogenic species that induce a seemingly diverse spectrum of neurological symptoms. During the 12 year period that followed the initial onset of neurological and gastrointestinal symptoms, an 11 year-old girl experienced a spectrum of neurological complaints including frequent headaches, visual and auditory hallucinations, anxiety, vision loss involving the lower left quadrant of both eyes, episodic bouts of generalized paralysis, facial palsy, chronic insomnia, seizures, dizziness, cognitive dysfunction, and memory loss...
May 10, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27098829/cingulate-island-sign-on-fdg-pet-is-associated-with-medial-temporal-lobe-atrophy-in-dementia-with-lewy-bodies
#15
Tomomichi Iizuka, Masashi Kameyama
OBJECTIVE: The cingulate island sign (CIS), which refers to sparing of the posterior cingulate relative to the precuneus and cuneus, has been proposed as an FDG-PET imaging feature of dementia with Lewy bodies (DLB). The sign is reportedly associated with Alzheimer's disease (AD) type neurofibrillary tangle (NFT) pathology in autopsy cases. To confirm this relationship using neuroimaging modalities in vivo, we investigated associations between CIS and the medial temporal lobe (MTL) atrophy in DLB...
July 2016: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/26877117/studies-of-auditory-verbal-hallucinations
#16
COMMENT
Stephan Heckers
Neuroscientists have been exploring the mechanism of auditory verbal hallucinations. In this commentary, I review studies by Judy Ford, who employed a vocalization paradigm to test the hypothesis of impaired corollary discharge in psychotic patients who experience auditory verbal hallucinations. I highlight the strengths of this research program and reflect on the challenge of reducing a complex clinical feature to an abnormality of basic cognitive processes, such as language and memory.
March 2016: Psychophysiology
https://www.readbyqxmd.com/read/26675294/the-changing-face-of-hallucination-research-the-international-consortium-on-hallucination-research-ichr-2015-meeting-report
#17
Neil Thomas, Susan L Rossell, Flavie Waters
This article reports on the Third Biennial Meeting of the International Consortium on Hallucinations Research, held in Melbourne, Australia, in October 2015. Following a public conference in which research findings were considered in relation to subjective experience and practice, 9 multidisciplinary working groups examined key current issues in progressing the conceptualization and research of hallucinations. Work group topics included: multicenter validation of the transdiagnostic and multimodal Questionnaire for Psychotic Experiences; development of an improved outcome measure for psychological therapies; the relationship between inhibition and hallucinations across multiple levels of explanation; hallucinations in relation to sleep phenomena; emotion and hallucinations; multiple interactions between the experience of self and hallucinations; interactions between language, auditory and memory networks; resting state networks including the default mode; and analyses arising from functional magnetic resonance imaging (fMRI) data-sharing...
July 2016: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/26441698/hallucinations-as-a-trauma-based-memory-implications-for-psychological-interventions
#18
REVIEW
Craig Steel
The relationship between hallucinations and life events is a topic of significant clinical importance. This review discusses the extent to which auditory and visual hallucinations may be directly related to traumatic events. Evidence suggests that intrusive images occur frequently within individuals who also report hallucinatory experiences. However, there has been limited research specifically investigating the extent to which hallucinations are the re-experiencing of a traumatic event. Our current theoretical understanding of these relationships, along with methodological difficulties associated with research in this area, are considered...
2015: Frontiers in Psychology
https://www.readbyqxmd.com/read/26404166/neuropsychiatric-symptoms-in-posterior-cortical-atrophy-and-alzheimer-disease
#19
COMPARATIVE STUDY
Aida Suárez-González, Sebastian J Crutch, Emilio Franco-Macías, Eulogio Gil-Néciga
BACKGROUND: Posterior cortical atrophy (PCA) is a rare neurodegenerative syndrome characterized by early progressive visual dysfunction in the context of relative preservation of memory and a pattern of atrophy mainly involving the posterior cortex. The aim of the present study is to characterize the neuropsychiatric profile of PCA. METHODS: The Neuropsychiatric Inventory was used to assess 12 neuropsychiatric symptoms (NPS) in 28 patients with PCA and 34 patients with typical Alzheimer disease (AD) matched by age, disease duration, and illness severity...
March 2016: Journal of Geriatric Psychiatry and Neurology
https://www.readbyqxmd.com/read/26292345/image-understanding-applications-of-lattice-autoassociative-memories
#20
Manuel Grana, Darya Chyzhyk
Multivariate mathematical morphology (MMM) aims to extend the mathematical morphology from gray scale images to images whose pixels are high-dimensional vectors, such as remote sensing hyperspectral images and functional magnetic resonance images (fMRIs). Defining an ordering over the multidimensional image data space is a fundamental issue MMM, to ensure that ensuing morphological operators and filters are mathematically consistent. Recent approaches use the outputs of two-class classifiers to build such reduced orderings...
September 2016: IEEE Transactions on Neural Networks and Learning Systems
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