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Visual hallucination

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https://www.readbyqxmd.com/read/27906088/folie-%C3%A3-deux-and-its-interaction-with-early-life-stress-a-case-report
#1
Alessandra Vargas Alves Nunes, Sandra Odebrecht Vargas Nunes, Talita Strano, Gilberto Pascolat, Gustavo Manoel Schier Doria, Mauricio Nasser Ehlke
BACKGROUND: Folie à deux is a very rare psychiatric syndrome in which a psychotic symptom is transmitted from one individual to another. We present a case of folie à deux occurring during childhood, which is not an usual presentation of this syndrome. In this case, the disorder is correlated with child abuse and neglect, which possibly had a role in the development of the symptoms in our case. CASE PRESENTATION: We present a case of folie à deux between an "induced" 9-year-old black Brazilian boy and the "inducer", his grandmother...
December 1, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27905557/hallucinations-in-schizophrenia-and-parkinson-s-disease-an-analysis-of-sensory-modalities-involved-and-the-repercussion-on-patients
#2
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/27900674/serotonergic-hallucinogen-induced-visual-perceptual-alterations
#3
Michael Kometer, Franz X Vollenweider
Serotonergic hallucinogens, such as lysergic acid diethylamide (LSD), psilocybin, and N,N-dimethyltryptamine (DMT), are famous for their capacity to temporally and profoundly alter an individual's visual experiences. These visual alterations show consistent attributes despite large inter- and intra-individual variances. Many reports document a common perception of colors as more saturated, with increased brightness and contrast in the environment ("Visual Intensifications"). Environmental objects might be altered in size ("Visual illusions") or take on a modified and special meaning for the subject ("Altered self-reference")...
November 30, 2016: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/27899123/a-functional-magnetic-resonance-imaging-investigation-of-visual-hallucinations-in-the-human-striate-cortex
#4
Hina Abid, Fayyaz Ahmad, Soo Y Lee, Hyun W Park, Dongmi Im, Iftikhar Ahmad, Safee U Chaudhary
PURPOSE: Human beings frequently experience fear, phobia, migraine and hallucinations, however, the cerebral mechanisms underpinning these conditions remain poorly understood. Towards this goal, in this work, we aim to correlate the human ocular perceptions with visual hallucinations, and map them to their cerebral origins. METHODS: An fMRI study was performed to examine the visual cortical areas including the striate, parastriate and peristriate cortex in the occipital lobe of the human brain...
November 29, 2016: Behavioral and Brain Functions: BBF
https://www.readbyqxmd.com/read/27897064/diagnosis-of-dementia-with-lewy-bodies-can-123-i-imp-and-123-i-mibg-scintigraphy-yield-new-core-features
#5
Fumi Sakamoto, Shinya Shiraishi, Noriko Tsuda, Mamoru Hashimoto, Seiji Tomiguchi, Manabu Ikeda, Yasuyuki Yamashita
OBJECTIVE: Since the clinical symptoms of different types of dementia frequently overlap, especially in the earlier stages at onset, it is difficult to distinguish dementias with Lewy bodies (DLB) from other neurodegenerative dementias based on their clinical manifestations alone. Nuclear medicine imaging has been reported as a high-value index for the objective evaluation and diagnosis of DLB. The aim of this study was to evaluate whether nuclear medicine imaging findings may yield core features to be added to the diagnosis of DLB...
November 29, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27878523/intravenous-ketamine-for-subacute-treatment-of-refractory-chronic-migraine-a-case-series
#6
Clinton Lauritsen, Santiago Mazuera, Richard B Lipton, Sait Ashina
BACKGROUND: Refractory migraine is a challenging condition with great impact on health related quality of life. Intravenous (IV) ketamine has been previously used to treat various refractory pain conditions. We present a series of patients with refractory migraine treated with intravenous ketamine in the hospital setting. METHODS: Based on retrospective chart review, we identified six patients with refractory migraine admitted from 2010 through 2014 for treatment with intravenous ketamine...
December 2016: Journal of Headache and Pain
https://www.readbyqxmd.com/read/27872259/hallucinations-a-systematic-review-of-points-of-similarity-and-difference-across-diagnostic-classes
#7
Flavie Waters, Charles Fernyhough
Hallucinations constitute one of the 5 symptom domains of psychotic disorders in DSM-5, suggesting diagnostic significance for that group of disorders. Although specific featural properties of hallucinations (negative voices, talking in the third person, and location in external space) are no longer highlighted in DSM, there is likely a residual assumption that hallucinations in schizophrenia can be identified based on these candidate features. We investigated whether certain featural properties of hallucinations are specifically indicative of schizophrenia by conducting a systematic review of studies showing direct comparisons of the featural and clinical characteristics of (auditory and visual) hallucinations among 2 or more population groups (one of which included schizophrenia)...
November 21, 2016: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/27865819/buzz-juice-neurological-sequelae-of-synthetic-cannabinoids
#8
Manisha Kak, Fadi Mikhail, Sho T Yano, Rui Guan, Rimas V Lukas
The use of synthetic cannabinoids is becoming more widespread. Familiarity with the potential toxicities associated with these agents will grow in importance. We present a case of a woman who developed onset of confusion, visual hallucinations, and ataxia after vaporizing synthetic cannabinoids. MRI imaging demonstrated restricted diffusion and increased T2/FLAIR signal in the corpus callosum and cerebellar peduncles.
November 16, 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27855483/prediction-of-relapse-after-discontinuation-of-antipsychotic-treatment-in-alzheimer-s-disease-the-role-of-hallucinations
#9
Anjali N Patel, Seonjoo Lee, Howard F Andrews, Gregory H Pelton, Susan K Schultz, David L Sultzer, Jacobo Mintzer, Danilo de la Pena, Sanjay Gupta, Sylvia Colon, Corbett Schimming, Bruce Levin, D P Devanand
OBJECTIVE: In Alzheimer's disease, antipsychotic medications are often used for a period, with relief of symptoms, and then discontinued, after which relapse may occur. The authors sought to determine which neuropsychiatric symptoms predict relapse. METHOD: In the Antipsychotic Discontinuation in Alzheimer's Disease trial, 180 patients with Alzheimer's disease and symptoms of agitation or psychosis were treated with risperidone for 16 weeks, after which patients who responded (N=110) were randomly assigned to continue risperidone for 32 weeks, to continue risperidone for 16 weeks followed by switch to placebo for 16 weeks, or to receive placebo for 32 weeks...
November 18, 2016: American Journal of Psychiatry
https://www.readbyqxmd.com/read/27823833/prevalence-and-risk-factors-for-visual-hallucinations-in-chinese-patients-with-parkinson-s-disease
#10
Jun Zhu, Bo Shen, Liyu Lu, Wenya Lan, Yang Pan, Lili Zhang, Jingde Dong, Min Wang, Li Zhang
BACKGROUND AND PURPOSE: Parkinson's disease (PD) patients frequently present visual hallucinations (VHs)·The determinants of VHs in Chinese PD patients remain largely unknown. The aim of this study was to illuminate the prevalence and clinical correlates of VHs in the Chinese population with PD. METHODS: A total of 371 consecutive, idiopathic PD patients were recruited into the study. Patients were categorized as hallucinators and nonhallucinators according to Movement Disorder Society-sponsored revision of the Unified Parkinson's Disease Rating Scale (MDS-UPDRS)...
October 27, 2016: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27797817/self-disembowelment-during-delirium-tremens-why-early-diagnosis-is-vital
#11
Rachel Thomasson, Vanessa Craig, Elspeth Guthrie
Delirium tremens is a serious yet treatable complication of alcohol withdrawal. Timely diagnosis is critical as there are well-established treatment regimens that provide symptomatic relief within hours to days. We report the case of a 34-year-old man with an undisclosed history of alcohol dependency. He presented with paranoid beliefs and was transferred to a psychiatric inpatient unit with suspected schizophrenia. Classic features of delirium tremens such as sympathetic overdrive and visual hallucinations were not salient features of his presentation...
October 24, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27790244/detection-of-low-signal-pulvinar-areas-using-diffusion-weighted-imaging-in-patients-with-dementia-experiencing-visual-hallucinations
#12
Mayuko Sugiura, Masayuki Satoh, Ken-Ichi Tabei, Tomoki Saito, Mutsuki Mori, Makiko Abe, Hirotaka Kida, Masayuki Maeda, Hajime Sakuma, Hidekazu Tomimoto
BACKGROUND: Little research has been conducted regarding the role of pulvinar nuclei in the pathogenesis of visual hallucinations due to the difficulty of assessing abnormalities in this region using conventional magnetic resonance imaging (MRI). The present study aimed to retrospectively investigate the relative abilities of diffusion-weighted imaging (DWI), fluid-attenuated inversion recovery (FLAIR), and susceptibility-weighted imaging (SWI) to visualize the pulvinar and to ascertain the relationship between pulvinar visualization and visual hallucinations...
September 2016: Dementia and Geriatric Cognitive Disorders Extra
https://www.readbyqxmd.com/read/27780181/benefit-and-harm-of-adding-ketamine-to-an-opioid-in-a-patient-controlled-analgesia-device-for-the-control-of-postoperative-pain-systematic-review-and-meta-analyses-of-randomized-controlled-trials-with-trial-sequential-analyses
#13
Benjamin Assouline, Martin R Tramèr, Lukas Kreienbühl, Nadia Elia
Ketamine is often added to opioids in patient-controlled analgesia devices. We tested whether in surgical patients, ketamine added to an opioid patient-controlled analgesia decreased pain intensity by ≥25%, cumulative opioid consumption by ≥30%, the risk of postoperative nausea and vomiting by ≥30%, the risk of respiratory adverse effects by ≥50%, and increased the risk of hallucination not more than 2-fold. In addition, we searched for evidence of dose-responsiveness. Nineteen randomized trials (1349 adults, 104 children) testing different ketamine regimens added to various opioids were identified through searches in databases and bibliographies (to 04...
August 29, 2016: Pain
https://www.readbyqxmd.com/read/27779326/olfactory-symptoms-reported-by-migraineurs-with-and-without-auras
#14
Marco Aurélio Fornazieri, Anibal Rodrigues Neto, Fabio de Rezende Pinna, Fabio Henrique Gobbi Porto, Paulo de Lima Navarro, Richard Louis Voegels, Richard L Doty
OBJECTIVE: Olfaction-related symptoms accompany migraine attacks and some, such as osmophobia, may be useful in differentiating migraine from other types of headaches. However, the types and frequencies of olfactory symptoms associated with migraine have not been well characterized. The goal of this study was to better characterize the olfactory symptoms of migraine. METHODS: A cross-sectional study was devised. One hundred and thirteen patients who met the International Classification of Headache Disorders II criteria for migraine were administered a new 65-item questionnaire specifically focused on olfaction-related experiences (eg, odor-related triggers, osmophobia, cacosmia, phantosmia, olfactory hallucinations, olfactory hypersensitivity, and self-perceived olfactory function)...
November 2016: Headache
https://www.readbyqxmd.com/read/27765426/diffusion-alterations-associated-with-parkinson-s-disease-symptomatology-a-review-of-the-literature
#15
Julie M Hall, Kaylena A Ehgoetz Martens, Courtney C Walton, Claire O'Callaghan, Peter E Keller, Simon J G Lewis, Ahmed A Moustafa
Parkinson's disease (PD) is a heterogeneous neurological disorder with a variety of motor and non-motor symptoms. The underlying mechanisms of these symptoms are not fully understood. An increased interest in structural connectivity analyses using diffusion tensor imaging (DTI) in PD has led to an expansion of our understanding of the impact of abnormalities in diffusivity on phenotype. This review outlines the contribution of these abnormalities to symptoms of PD including bradykinesia, tremor and non-tremor phenotypes, freezing of gait, cognitive impairment, mood, sleep disturbances, visual hallucinations and olfactory dysfunction...
September 28, 2016: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/27760431/visual-hallucination-and-pattern-of-brain-degeneration-in-parkinson-s-disease
#16
Woong-Woo Lee, Eun Jin Yoon, Jee-Young Lee, Sun-Won Park, Yu Kyeong Kim
BACKGROUND AND OBJECTIVES: The incidence of visual hallucination (VH) increases with Parkinson's disease (PD) progression, and its development is thought to be related to a specific neurodegenerative process in PD. This study aimed to reveal brain degeneration related to VH in PD by analyzing neuroimaging data obtained from patients in their different stages of PD. METHODS: Data from 48 PD patients - 21 nondemented without VH (PNV group), 10 nondemented with VH (PV group), and 17 demented with VH (PVD group) - and 30 age-matched healthy controls (HC group) were analyzed...
October 20, 2016: Neuro-degenerative Diseases
https://www.readbyqxmd.com/read/27759479/mdmb-chmica-availability-patterns-of-use-and-toxicity-associated-with-this-novel-psychoactive-substance
#17
Mark Haden, John R H Archer, Paul I Dargan, David M Wood
BACKGROUND: MDMB-CHMICA (methyl 2-[[1-(cyclohexylmethyl)indole-3-carbonyl]amino]-3,3-dimethylbutanoate) is a synthetic cannabinoid receptor agonist that has been detected in several recreational drug products in Europe since August 2014. OBJECTIVES: This article aims to describe the prevalence of use, availability, and desired and adverse effects of MDMB-CHMICA. METHODS: Data were collated from published scientific literature, and systematic searches were conducted of publically available Internet sources (the "gray literature"), including websites offering to sell MDMB-CHMICA and Internet discussion forums featuring user reports...
October 19, 2016: Substance Use & Misuse
https://www.readbyqxmd.com/read/27757139/charles-bonnet-syndrome-following-trans-sphenoidal-adenomectomy-without-optic-nerve-atrophy
#18
Jang-Ho Park, Joon-Ho Ahn, Jun-Bum Park, Soohyun Joe
Charles Bonnet syndrome (CBS) can develop after trans-sphenoidal adenomectomy (TSA); however, the neural mechanisms remain unknown. Sensory deprivation and releasing phenomenon are both hypothetical explanations for this condition; however, there is no definite evidence that strongly supports either supposition. We report the first case of CBS after TSA without optic nerve atrophy. Postoperatively, the patient's vision seemed to be relatively well preserved, apart from the left-side hemianopsia in the right eye...
September 2016: Psychiatry Investigation
https://www.readbyqxmd.com/read/27752826/psychopathological-and-demographic-characteristics-of-hallucinating-patients-with-schizophrenia-and-schizoaffective-disorder-an-analysis-based-on-amdp-data
#19
Christopher Baethge, Michaela Jänner, Wolfgang Gaebel, Jaroslav Malevani
Hallucinations are at the core of the diagnosis of schizophrenia and schizoaffective disorders, and many neuroscience studies focus on hallucinations. However, there is a lack of data on prevalence, subtyping, and clinical correlates of hallucinations as well as on the comparison of hallucinating schizophrenia versus hallucinating schizoaffective patients. Analysis of all psychopathology evaluations is based on the AMDP scale in a German psychiatric university hospital between 2007 and 2013 regarding patients with schizophrenia or schizoaffective disorder (diagnosed according to ICD-10)...
October 17, 2016: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/27746052/the-associations-between-multisensory-temporal-processing-and-symptoms-of-schizophrenia
#20
Ryan A Stevenson, Sohee Park, Channing Cochran, Lindsey G McIntosh, Jean-Paul Noel, Morgan D Barense, Susanne Ferber, Mark T Wallace
Recent neurobiological accounts of schizophrenia have included an emphasis on changes in sensory processing. These sensory and perceptual deficits can have a cascading effect onto higher-level cognitive processes and clinical symptoms. One form of sensory dysfunction that has been consistently observed in schizophrenia is altered temporal processing. In this study, we investigated temporal processing within and across the auditory and visual modalities in individuals with schizophrenia (SCZ) and age-matched healthy controls...
October 13, 2016: Schizophrenia Research
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