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Schizophrenia hallucination

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https://www.readbyqxmd.com/read/28109666/diminished-auditory-sensory-gating-during-active-auditory-verbal-hallucinations
#1
Robert J Thoma, Andrew Meier, Jon Houck, Vincent P Clark, Jeffrey D Lewine, Jessica Turner, Vince Calhoun, Julia Stephen
Auditory sensory gating, assessed in a paired-click paradigm, indicates the extent to which incoming stimuli are filtered, or "gated", in auditory cortex. Gating is typically computed as the ratio of the peak amplitude of the event related potential (ERP) to a second click (S2) divided by the peak amplitude of the ERP to a first click (S1). Higher gating ratios are purportedly indicative of incomplete suppression of S2 and considered to represent sensory processing dysfunction. In schizophrenia, hallucination severity is positively correlated with gating ratios, and it was hypothesized that a failure of sensory control processes early in auditory sensation (gating) may represent a larger system failure within the auditory data stream; resulting in auditory verbal hallucinations (AVH)...
January 18, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28104737/cerebral-blood-flow-alterations-specific-to-auditory-verbal-hallucinations-in-schizophrenia
#2
Chuanjun Zhuo, Jiajia Zhu, Wen Qin, Hongru Qu, Xiaolei Ma, Chunshui Yu
BACKGROUND: Auditory verbal hallucinations (AVHs) have been associated with deficits in auditory and speech-related networks. However, the resting-state cerebral blood flow (CBF) alterations specific to AVHs in schizophrenia remain unknown. AIMS: To explore AVH-related CBF alterations in individuals with schizophrenia. METHOD: In total, 35 individuals with schizophrenia with AVHs, 41 individuals with schizophrenia without AVHs and 50 controls underwent arterial spin labelling magnetic resonance imaging...
January 19, 2017: British Journal of Psychiatry: the Journal of Mental Science
https://www.readbyqxmd.com/read/28097738/enhanced-predictive-signalling-in-schizophrenia
#3
Katharina Schmack, Marcus Rothkirch, Josef Priller, Philipp Sterzer
Positive symptoms of schizophrenia such as delusions and hallucinations are thought to arise from an alteration in predictive mechanisms of the brain. Here, we empirically tested the hypothesis that schizophrenia is associated with an enhanced signalling of higher-level predictions that shape perception into conformity with acquired beliefs. Twenty-one patients with schizophrenia and twenty-eight healthy controls matched for age and gender took part in a functional magnetic resonance imaging (fMRI) experiment that assessed the effect of an experimental manipulation of cognitive beliefs on the perception of an ambiguous visual motion stimulus...
January 18, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28064283/time-and-events-on-the-phenomenology-of-temporal-experience-in-schizophrenia-ancillary-article-to-eawe-domain-2
#4
Thomas Fuchs, Zeno Van Duppen
Temporality and its disturbances have been a major topic of phenomenological psychopathology. Particularly Minkowski, Kimura, and Blankenburg described the temporal dimension of schizophrenia. After a brief introduction to their ideas, we describe more recent approaches to temporality in more depth. To this aim, we first distinguish between implicit and explicit time. Implicit time is based on the constitutive synthesis of inner time consciousness on the one hand, and on the conative-affective dynamics of life on the other...
January 7, 2017: Psychopathology
https://www.readbyqxmd.com/read/28047652/su-f-sps-07-magnetic-resonance-spectroscopy-findings-in-early-phase-psychosis
#5
A Wright, R Ma, T Hummer, M Francis, N Mehdiyoun, U Dydak, A Breier
PURPOSE: Schizophrenia is a psychiatric disorder characterized by disordered thoughts, abnormal social behaviors, flat affect, and auditory or visual hallucinations. The current study aims to investigate alterations in brain metabolism in patients near the onset of psychosis (early-phase psychosis, EPP), to characterize abnormalities during the early stages of schizophrenia. To this end, we used magnetic resonance imaging (MRI) and spectroscopy (MRS) to measure metabolite levels and subsequently monitor the effect of treatment with N-acetylcysteine (NAC)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28024236/cerebral-blood-flow-and-its-connectivity-features-of-auditory-verbal-hallucinations-in-schizophrenia-a-perfusion-study
#6
Long-Biao Cui, Gang Chen, Zi-Liang Xu, Lin Liu, Hua-Ning Wang, Li Guo, Wen-Ming Liu, Ting-Ting Liu, Shun Qi, Kang Liu, Wei Qin, Jin-Bo Sun, Yi-Bin Xi, Hong Yin
The goal of the study was to investigate cerebral blood flow (CBF) and its connectivity (an across-subject covariance measure) patterns of schizophrenia (SZ) patients with auditory verbal hallucinations (AVHs). A total of demographically matched 25 SZ patients with AVHs, 25 without AVHs, and 25 healthy controls (HCs) underwent resting state perfusion imaging using a pulsed arterial spin labeling sequence. CBF and its connectivity were analyzed and then CBF topological properties were calculated. AVHs patients exhibited decreased CBF in the bilateral superior and middle frontal gyri and postcentral gyri, and right supplementary motor area compared with SZ patients without AVHs...
December 11, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/28012640/white-matter-integrity-and-symptom-dimensions-of-schizophrenia-a-diffusion-tensor-imaging-study
#7
Miriam H A Bopp, Rebecca Zöllner, Andreas Jansen, Bruno Dietsche, Axel Krug, Tilo T J Kircher
Impaired fiber bundle connectivity between brain regions is a key neuropathological finding in schizophrenia. Symptom dimensions in schizophrenia can be clustered into factor models. Single syndromes have been related to grey and white matter brain structure alterations. We associated all core syndromes of schizophrenia in a single patient group with changes in white matter integrity. Diffusion weighted images (3T MRI) and SAPS/SANS scores were measured in 26 male patients and 26 healthy controls. First, group differences in fractional anisotropy (FA) were calculated with TBSS...
December 21, 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/28010158/abnormalities-of-language-pathways-in-schizophrenia-patients-with-and-without-a-lifetime-history-of-auditory-verbal-hallucinations-a-dti-based-tractography-study
#8
Elise Leroux, Nicolas Delcroix, Sonia Dollfus
OBJECTIVES: Auditory verbal hallucinations (AVHs) are frequently observed in patients with schizophrenia and could be the result of white matter (WM) fibre abnormalities involved in speech production/comprehension and perception. We evaluated WM integrity changes in schizophrenia with (SZ+) and without (SZ-) lifetime AVHs compared to healthy controls, using diffusion tensor imaging-based tractography, with a novel focus on the structural connectivity within both intra- and interhemispheric fasciculi...
December 23, 2016: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/28009080/disruptions-in-the-left-frontoparietal-network-underlie-resting-state-endophenotypic-markers-in-schizophrenia
#9
George Chahine, Anja Richter, Sarah Wolter, Roberto Goya-Maldonado, Oliver Gruber
Advances in functional brain imaging have improved the search for potential endophenotypic markers in schizophrenia. Here, we employed independent component analysis (ICA) and dynamic causal modeling (DCM) in resting state fMRI on a sample of 35 schizophrenia patients, 20 first-degree relatives and 35 control subjects. Analysis on ICA-derived networks revealed increased functional connectivity between the left frontoparietal network (FPN) and left temporal and parietal regions in schizophrenia patients (P < 0...
December 23, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/28003468/the-clinical-features-of-paranoia-in-the-20th-century-and-their-representation-in-diagnostic-criteria-from-dsm-iii-through-dsm-5
#10
Kenneth S Kendler
This review traces, through psychiatric textbooks, the history of the Kraepelinian concept of paranoia in the 20th century and then relates the common reported symptoms and signs to the diagnostic criteria for paranoia/delusional disorder in DSM-III through DSM-5. Clinical descriptions of paranoia appearing in 10 textbooks, published 1899 to 1970, revealed 11 prominent symptoms and signs reported by 5 or more authors. Three symptoms (systematized delusions, minimal hallucinations, and prominent ideas of reference) and 2 signs (chronic course and minimal affective deterioration) were reported by 8 or 9 of the authors...
December 21, 2016: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/27995063/integrity-of-the-arcuate-fasciculus-in-patients-with-schizophrenia-with-auditory-verbal-hallucinations-a-dti-tractography-study
#11
Marion Psomiades, Clara Fonteneau, Marine Mondino, David Luck, Frederic Haesebaert, Marie-Françoise Suaud-Chagny, Jerome Brunelin
Auditory verbal hallucinations (AVH) of schizophrenia are associated with a disrupted connectivity between frontal and temporoparietal language areas. We hypothesized that this dysconnectivity is underpinned by white matter abnormalities in the left arcuate fasciculus, the main fiber bundle connecting speech production and perception areas. We therefore investigated the relationship between AVH severity and the integrity of the arcuate fasciculus measured by diffusion tensor imaging (DTI) tractography in patients with schizophrenia...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27987221/active-and-placebo-transcranial-magnetic-stimulation-effects-on-external-and-internal-auditory-hallucinations-of-schizophrenia
#12
M-L Paillère-Martinot, A Galinowski, M Plaze, J Andoh, D Bartrés-Faz, F Bellivier, J-P Lefaucheur, D Rivière, T Gallarda, J-L Martinot, E Artiges
OBJECTIVE: Repetitive transcranial magnetic stimulation (rTMS) over the left temporo-parietal region has been proposed as a treatment for resistant auditory verbal hallucinations (AVH), but which patients are more likely to benefit from rTMS is still unclear. This study sought to assess the effects of rTMS on AVH, with a focus on hallucination phenomenology. METHOD: Twenty-seven patients with schizophrenia and medication-resistant AVH participated to a randomized, double-blind, placebo-controlled, add-on rTMS study...
December 16, 2016: Acta Psychiatrica Scandinavica
https://www.readbyqxmd.com/read/27984260/persistent-interictal-musical-hallucination-in-a-patient-with-mesial-temporal-sclerosis-related-epilepsy-first-case-report-and-etiopathological-hypothesis
#13
Paolo Borelli, Marcella Vedovello, Massimiliano Braga, Massimo Pederzoli, Sandro Beretta
Musical hallucination is a disorder of complex sound processing of instrumental music, songs, choirs, chants, etc. The underlying pathologies include moderate to severe acquired hearing loss (the auditory equivalent of Charles Bonnet syndrome), psychiatric illnesses (depression, schizophrenia), drug intoxication (benzodiazepines, salicylate, pentoxifylline, propranolol), traumatic lesions along the acoustic pathways, and epilepsy. The hallucinations are most likely to begin late in life; 70% of patients are women...
December 2016: Cognitive and Behavioral Neurology: Official Journal of the Society for Behavioral and Cognitive Neurology
https://www.readbyqxmd.com/read/27964941/testing-continuum-models-of-psychosis-no-reduction-in-source-monitoring-ability-in-healthy-individuals-prone-to-auditory-hallucinations
#14
Jane R Garrison, Peter Moseley, Ben Alderson-Day, David Smailes, Charles Fernyhough, Jon S Simons
People with schizophrenia who hallucinate show impairments in reality monitoring (the ability to distinguish internally generated information from information obtained from external sources) compared to non-hallucinating patients and healthy individuals. While this may be explained at least in part by an increased externalizing bias, it remains unclear whether this impairment is specific to reality monitoring, or whether it also reflects a general deficit in the monitoring of self-generated information (internal source monitoring)...
November 22, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27957657/adverse-childhood-experiences-among-men-with-schizophrenia
#15
Miguel Vallejos, Oscar M Cesoni, Romina Farinola, Matías S Bertone, Cintia R Prokopez
Individuals who suffered traumatic events or adverse experiences during their childhood have an increased risk of developing during adulthood physical problems, aggressive behavior, and psychiatric disorders, such as schizophrenia. Patients diagnosed with schizophrenia have higher rates of traumatic experiences during childhood than the general population, and those who suffered multiple traumatic events have an increased risk of disease relapse. The current study aims to determine the prevalence of different types of adverse experiences during childhood among a male patient sample with schizophrenia...
December 12, 2016: Psychiatric Quarterly
https://www.readbyqxmd.com/read/27931901/auditory-false-perception-in-schizophrenia-development-and-validation-of-auditory-signal-detection-task
#16
Harleen Chhabra, Selvaraj Sowmya, Vanteemar S Sreeraj, Sunil V Kalmady, Venkataram Shivakumar, Anekal C Amaresha, Janardhanan C Narayanaswamy, Ganesan Venkatasubramanian
Auditory hallucinations constitute an important symptom component in 70-80% of schizophrenia patients. These hallucinations are proposed to occur due to an imbalance between perceptual expectation and external input, resulting in attachment of meaning to abstract noises; signal detection theory has been proposed to explain these phenomena. In this study, we describe the development of an auditory signal detection task using a carefully chosen set of English words that could be tested successfully in schizophrenia patients coming from varying linguistic, cultural and social backgrounds...
December 2016: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/27926911/first-rank-symptoms-in-methamphetamine-psychosis-and-schizophrenia
#17
James Shelly, Anne Uhlmann, Heidi Sinclair, Fleur M Howells, Goodman Sibeko, Don Wilson, Dan J Stein, Henk Temmingh
BACKGROUND: Methamphetamine psychosis (MAP) symptomatology has been described as indistinguishable from that of schizophrenia (SZ), yet research comparing these two disorders on specific psychotic symptoms such as schneiderian first-rank symptoms (FRS) is lacking. We aimed to determine and compare the occurrence and associations of FRS in patients diagnosed with MAP and with SZ. SAMPLING AND METHOD: Data from SCID-I interviews performed on patients with either a diagnosis of SZ or MAP were compared...
2016: Psychopathology
https://www.readbyqxmd.com/read/27919467/erratum-to-brain-connectivity-and-auditory-hallucinations-in-search-of-novel-noninvasive-brain-stimulation-therapeutic-approaches-for-schizophrenia-rev-neurol-159-11-2016
#18
F Thomas, V Moulier, A Valero-Cabré, D Januel
No abstract text is available yet for this article.
December 2, 2016: Revue Neurologique
https://www.readbyqxmd.com/read/27905557/hallucinations-in-schizophrenia-and-parkinson-s-disease-an-analysis-of-sensory-modalities-involved-and-the-repercussion-on-patients
#19
P M Llorca, B Pereira, R Jardri, I Chereau-Boudet, G Brousse, D Misdrahi, G Fénelon, A-M Tronche, R Schwan, C Lançon, A Marques, M Ulla, P Derost, B Debilly, F Durif, I de Chazeron
Hallucinations have been described in various clinical populations, but they are neither disorder nor disease specific. In schizophrenia patients, hallucinations are hallmark symptoms and auditory ones are described as the more frequent. In Parkinson's disease, the descriptions of hallucination modalities are sparse, but the hallucinations do tend to have less negative consequences. Our study aims to explore the phenomenology of hallucinations in both hallucinating schizophrenia patients and Parkinson's disease patients using the Psycho-Sensory hAllucinations Scale (PSAS)...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27877142/the-proximity-between-hallucination-and-delusion-dimensions-an-observational-analytic-cross-sectional-multicentre-study
#20
Diogo Telles-Correia, Ana L Moreira, João Gama Marques, Sérgio Saraiva, Cátia A Moreira, Filipa Antunes, Carolina Almeida, Nuno B Rocha
In psychiatric classifications, hallucinations (mainly auditory hallucinations) are one of the fundamental criteria for establishing a schizophrenia diagnosis or any of the related psychotic disorder's diagnoses. The conceptual proximity between delusions and hallucinations was maintained until the end of the XIX century, with several supporters during the XX century. Their limits were not yet definitely defined in terms of Descriptive Psychopathology, and much less so in terms of biochemical and anatomical models...
2016: Frontiers in Psychology
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