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Visual hallucinations

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https://www.readbyqxmd.com/read/29145190/charles-bonnet-syndrome-and-other-hallucinatory-phenomena
#1
François Boller, Daniel S Birnbaum, Nicoletta Caputi
Descriptions of hallucinatory phenomena have figured prominently since the beginning of recorded history. Jean Etienne Esquirol (1772-1840) is usually credited for having introduced the term in 1817, differentiating between hallucinations and illusions. Both are wrong perceptions, but in illusions, an external stimulus is always present whereas hallucinations are perceptions that occur in the absence of corresponding sensory stimuli. They occur in a variety of conditions but more often in the mentally ill, especially in schizophrenia where hallucinations, particularly auditory hallucinations represent for many, such as Henri Ey one of the cardinal features...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29143692/non-pharmacological-interventions-for-lewy-body-dementia-a-systematic-review
#2
Michael H Connors, Lena Quinto, Ian McKeith, Henry Brodaty, Louise Allan, Claire Bamford, Alan Thomas, John-Paul Taylor, John T O'Brien
Lewy body dementia (consisting of dementia with Lewy bodies and Parkinson's disease dementia) is a common neurodegenerative disease characterised by visual hallucinations, fluctuating attention, motor disturbances, falls, and sensitivity to antipsychotics. This combination of features presents challenges for pharmacological management. Given this, we sought to review evidence for non-pharmacological interventions with patients with Lewy body dementia and their carers. Bibliographic databases were searched using a wide range of search terms and no restrictions were placed on study design, language, or clinical setting...
November 16, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29120562/be-vigilant-for-dementia-in-parkinson%C3%A2-s-disease
#3
Flavia Niccolini, Konstantinos Diamantopoulos, Stelios Kiosses, Marios Politis
It is estimated that up to 80% of patients with Parkinson's disease will eventually develop cognitive impairment over the course of their illness. Even at the time of diagnosis, cognitive impairment has been reported in 20-25% of patients. Commonly affected cognitive domains are executive function, visuospatial ability and attention control. In addition, patients with Parkinson's disease dementia may present with deficits in language function and verbal memory. Psychosis may occur in approximately 40% of patients with Parkinson's disease, and is associated with an increased risk of developing cognitive impairment...
May 2017: Practitioner
https://www.readbyqxmd.com/read/29116669/altered-states-of-consciousness-evaluation-of-a-voice-hearing-simulation-during-an-immersive-art-exhibition
#4
Simon Riches, Rich Maskey, Rachel Waddingham, Jonny Benjamin, Patrick Dishman, Charlie Tebrook, Eve Mundy, Phoebe Roberts, Helen L Fisher
AIM: To improve public understanding of the subjective experience of auditory hallucinations and increase empathy towards individuals who hear voices and have other unusual sensory experiences. METHODS: This pilot study developed a new immersive art exhibition, Altered States of Consciousness, which gave members of the public an individualized voice-hearing simulation experience in 2 real-world settings-an art gallery and the London Underground. A total of 150 visitors completed visual analogue scales immediately before and after their experience of the exhibition...
November 8, 2017: Early Intervention in Psychiatry
https://www.readbyqxmd.com/read/29112326/real-world-challenges-and-unmet-needs-in-the-diagnosis-and-treatment-of-suspected-invasive-pulmonary-aspergillosis-in-patients-with-hematological-diseases-an-illustrative-case-study
#5
Martin Hoenigl, Juergen Prattes, Peter Neumeister, Albert Wölfler, Robert Krause
Recent years have seen important advances in the diagnosis of invasive pulmonary aspergillosis (IPA), complemented by the introduction of new therapies. Despite this, IPA remains a major cause of infection-related mortality in patients with hematological diseases. There are two main reasons for this. First, diagnosis of IPA remains a challenge, since risk factors and the clinical, radiological and mycological presentations vary not only by fungal disease stage, but also by patient group (e.g. neutropenic versus non-neutropenic patients)...
November 7, 2017: Mycoses
https://www.readbyqxmd.com/read/29073221/distinct-retrosplenial-cortex-cell-populations-and-their-spike-dynamics-during-ketamine-induced-unconscious-state
#6
Grace E Fox, Meng Li, Fang Zhao, Joe Z Tsien
Ketamine is known to induce psychotic-like symptoms, including delirium and visual hallucinations. It also causes neuronal damage and cell death in the retrosplenial cortex (RSC), an area that is thought to be a part of high visual cortical pathways and at least partially responsible for ketamine's psychotomimetic activities. However, the basic physiological properties of RSC cells as well as their response to ketamine in vivo remained largely unexplored. Here, we combine a computational method, the Inter-Spike Interval Classification Analysis (ISICA), and in vivo recordings to uncover and profile excitatory cell subtypes within layers 2&3 and 5&6 of the RSC in mice within both conscious, sleep, and ketamine-induced unconscious states...
2017: PloS One
https://www.readbyqxmd.com/read/29059136/successful-use-of-escitalopram-for-the-treatment-of-visual-hallucinations-in-patients-with-parkinson-disease
#7
Joseph Bergman, Paul P Lerner, Shmuel Sokolik, Vladimir Lerner, Anatoly Kreinin, Chanoch Miodownik
INTRODUCTION: Patients with Parkinson disease (PD) frequently experience visual hallucinations (VH). Visual hallucinations are most often viewed as an adverse effect of antiparkinsonian treatment. Possible treatments for this disturbance include a reduction of antiparkinsonian medications, adding atypical antipsychotics, or cholinesterase inhibitors. Some studies demonstrated that selective serotonin reuptake inhibitors may be an optional treatment for patients experiencing psychosis or agitation in dementia...
November 2017: Clinical Neuropharmacology
https://www.readbyqxmd.com/read/29032012/continuous-subcutaneous-apomorphine-infusion-in-parkinson-s-disease-patients-with-cognitive-dysfunction-a-retrospective-long-term-follow-up-study
#8
Robbert W K Borgemeester, Teus van Laar
INTRODUCTION: Continuous apomorphine infusion (CAI) is an advanced therapy in fluctuating Parkinson's disease (PD). The use of CAI is controversial in PD patients with cognitive dysfunction including visual hallucinations (VHs), and orthostatic hypotension (OH). This study was set-up to analyze the effectiveness and safety of CAI in elderly PD patients with cognitive dysfunction. METHODS: This new-user cohort study identified fluctuating PD patients who started CAI treatment at the rehabilitation unit of Parkinson Expertise Center (RU-PEC) Groningen, from November 2004 until 2016...
September 29, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29019460/auditory-hallucinations-as-translational-psychiatry-evidence-from-magnetic-resonance-imaging
#9
Kenneth Hugdahl
In this invited review article I present a translational perspective and overview of our research on auditory hallucinations in schizophrenia at the University of Bergen, Norway with a focus on the neuronal mechanisms underlying the phenomenology of experiencing "hearing voices". An auditory verbal hallucination, i.e. "hearing a voice", is defined as a sensory experience in the absence of a corresponding external sensory source that could explain the phenomenological experience. I suggest a general frame or scheme for the study of auditory verbal hallucinations which is called Levels of Explanation (LoE)...
October 11, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28993094/characterization-of-diplopia-in-non-demented-patients-with-parkinson-s-disease
#10
Katharina A Schindlbeck, Shideh Schönfeld, Wanda Naumann, David J Friedrich, André Maier, Charlotte Rewitzer, Fabian Klostermann, Frank Marzinzik
INTRODUCTION: Although diplopia is considered a frequent symptom of Parkinson's disease (PD), little is known about its clinical manifestation, associated mechanisms and treatment. Here we characterized binocular diplopia in non-demented PD patients in an interdisciplinary setting. METHODS: PD patients were prospectively screened for diplopia, visual hallucinations, problems with spatial perception, contrast sensitivity, presence of blurred vision, and history of ophthalmological comorbidities via interview...
September 29, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28991698/pitx3-genotype-and-risk-of-dementia-in-parkinson-s-disease-a-population-based-study
#11
David Bäckström, Magdalena Eriksson Domellöf, Gabriel Granåsen, Jan Linder, Sofia Mayans, Eva Elgh, Susanna Jakobson Mo, Lars Forsgren
Dementia is a devastating manifestation of Parkinson's disease (PD). This study investigates whether a common polymorphism in the PITX3 gene (rs2281983), which is of importance for the function of dopaminergic neurons, affects the risk of developing dementia in PD and whether it affects dopamine transporter (DAT) uptake. We PITX3 genotyped 133 patients with new-onset, idiopathic PD, participating in a population-based study in Sweden. Patients were followed prospectively during 6-11years with extensive investigations, including neuropsychology and DAT-imaging with (123)I FP-CIT...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28984777/anti-ma2-associated-limbic-encephalitis-with-coexisting-chronic-inflammatory-demyelinating-polyneuropathy-in-a-patient-with-non-hodgkin-lymphoma-a-case-report
#12
Weina Ju, Baochang Qi, Xu Wang, Yu Yang
RATIONALE: We report the rare case of a 74-year-old man with anti-Ma2-associated paraneoplastic neurologic syndrome (PNS), and review and analyze the clinical manifestations, diagnosis, and treatment of the disease. PATIENT CONCERNS: The patient presented with a 5-month history of muscle weakness, progressive body aches, and weakness and numbness in both lower extremities. Before his hospitalization, he had experienced cognitive function decline; ptosis, inward gaze, and vertical gaze palsy in the right eye; and occasional visual hallucinations...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28972381/distinguishing-subjective-halitosis
#13
Murat Aydin, Mustafa Çağrı Derici, Defne Yalçın Yeler, Murat Özen Eren
Halitosis is chronic, endogenous malodor that is etiologically classified. Subjective halitosis, which may appear in clinically neurologic (neurogenic) or psychologic (psychogenic) forms, cannot be confirmed by using tests or performing visual inspection despite insistent complaints of malodor by the patient. Neurogenic forms mainly consist of chemosensory dysfunctions (dysguisa, dysosmia) and self-halitosis (retronasal olfaction, bloodborne olfactory receptor responses, phantosmia); whereas psychogenic forms are olfactory hallucinations, halitophobia, olfactory obsession, and delusional halitosis...
October 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28967351/acute-lsd-effects-on-response-inhibition-neural-networks
#14
A Schmidt, F Müller, C Lenz, P C Dolder, Y Schmid, D Zanchi, U E Lang, M E Liechti, S Borgwardt
BACKGROUND: Recent evidence shows that the serotonin 2A receptor (5-hydroxytryptamine2A receptor, 5-HT2AR) is critically involved in the formation of visual hallucinations and cognitive impairments in lysergic acid diethylamide (LSD)-induced states and neuropsychiatric diseases. However, the interaction between 5-HT2AR activation, cognitive impairments and visual hallucinations is still poorly understood. This study explored the effect of 5-HT2AR activation on response inhibition neural networks in healthy subjects by using LSD and further tested whether brain activation during response inhibition under LSD exposure was related to LSD-induced visual hallucinations...
October 2, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28952907/loss-of-functional-connectivity-in-patients-with-parkinson-disease-and-visual-hallucinations
#15
Dagmar H Hepp, Elisabeth M J Foncke, Kim T E Olde Dubbelink, Wilma D J van de Berg, Henk W Berendse, Menno M Schoonheim
Purpose To gain more insight into the pathophysiological mechanisms of visual hallucinations (VHs) in patients with Parkinson disease (PD) by analyzing whole-brain resting-state functional connectivity in PD patients with VH (hereafter, referred to as PD + VH patients) and without VH (hereafter, referred to as PD - VH patients) and control participants. Materials and Methods For this retrospective study, 15 PD + VH patients, 40 PD - VH patients, and 15 control participants from a prospective cohort study were included, which was approved by the local ethics board and written informed consent was obtained from all participants...
December 2017: Radiology
https://www.readbyqxmd.com/read/28940312/increased-thalamic-resting-state-connectivity-as-a-core-driver-of-lsd-induced-hallucinations
#16
F Müller, C Lenz, P Dolder, U Lang, A Schmidt, M Liechti, S Borgwardt
OBJECTIVE: It has been proposed that the thalamocortical system is an important site of action of hallucinogenic drugs and an essential component of the neural correlates of consciousness. Hallucinogenic drugs such as LSD can be used to induce profoundly altered states of consciousness, and it is thus of interest to test the effects of these drugs on this system. METHOD: 100 μg LSD was administrated orally to 20 healthy participants prior to fMRI assessment. Whole brain thalamic functional connectivity was measured using ROI-to-ROI and ROI-to-voxel approaches...
September 21, 2017: Acta Psychiatrica Scandinavica
https://www.readbyqxmd.com/read/28936822/-posterior-reversible-encephalopathy-syndrome-triggerred-by-alcohol-withdrawal
#17
Tuğçe Mengi, Yaprak Seçil, Aysel Çoban, Yeşim Beckmann
INTRODUCTION: Posterior reversible encephalopathy syndrome (PRES) is a clinico-radiological entity characterized by headache, altered mental status, epileptic seizures, visual disturbances and typically transient changes in posterior cerebral circulation areas. In this article, we present a case of alcohol withdrawal accompanied by PRES. CASE PRESENTATION: A 53-year-old male patient presented to the emergency department with visual hallucinations and meaningless speech...
2017: Türk Psikiyatri Dergisi, Turkish Journal of Psychiatry
https://www.readbyqxmd.com/read/28926419/peduncular-hallucinosis-and-autonomic-dysfunction-in-anti-aquaporin-4-antibody-syndrome
#18
Renee Berry, Peter K Panegyres
Neuromyelitis optica is a rare, severe inflammatory demyelinating disease of the central nervous system, previously described as affecting only the optic nerve and spinal cord. Since the discovery of a highly specific autoantibody, anti-aquaporin-4, lesions are now recognized outside these regions. We report a man with severe, debilitating symptoms resulting from a symptomatic lesion within the diencephalon, manifesting with abnormal circadian rhythms, autonomic dysfunction, behavioral disturbance, and complex visual hallucinations...
September 2017: Cognitive and Behavioral Neurology: Official Journal of the Society for Behavioral and Cognitive Neurology
https://www.readbyqxmd.com/read/28898304/-use-of-cannabis-and-incidence-of-psychotic-symptoms-evidence-from-buenos-aires
#19
Ángeles Barrera, María P Rocha, Eduardo Leiderman
OBJECTIVES: Cannabis use has been frequently associated to the experience of psychotic symptoms in the research literature. The objective was to investigate the association between cannabis use and psychotic like experiences in the city of Buenos Aires. METHODS: A sample of 862 respondents of the metropolitan area of Buenos Aires, aged =18 years, was interviewed regarding their cannabis use, and presence of psychotic like experiences. RESULTS: Cannabis use was associated to psychotic like experiences, in particular to perceptual abnormalities (visual and auditory hallucinations)...
November 2016: Vertex: Revista Argentina de Psiquiatriá
https://www.readbyqxmd.com/read/28874102/ertapenem-associated-neurotoxicity-in-the-spinal-cord-injury-sci-population-a-case-series
#20
Ursula C Patel, Mallory A Fowler
Context Ertapenem, a broad spectrum carbapenem antibiotic, is used often in Spinal Cord Injury (SCI) patients due to increased risk factors for multi-drug resistant (MDR) infections in this population. Neurotoxicity, specifically seizures, due to ertapenem is a known adverse effect and has been described previously. Other manifestations such as delirium and visual hallucinations have rarely been reported, and no literature, to the best of our knowledge, specifically describes these effects solely in the SCI population...
September 6, 2017: Journal of Spinal Cord Medicine
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