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Visual hallucinations

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https://www.readbyqxmd.com/read/28424394/-brodmann-areas-17-18-and-19-in-the-human-brain-an-overview
#1
Juro Kawachi
Brodmann areas 17, 18, and 19 in the human brain are visual cortices of the occipital lobe. Each area has its own retinotopic representations, particulary area 19, which has many small retinotopic areas representing half or all of the contralateral visual field, several functional areas, and nine cytoarchitectonic areas. Several fasciculi are known as occipital fiber connections, but their precise endpoints are not clear. Lesions in the visual cortices cause several visual disorders including visual field defect, visual hallucinations, metamorphopsia, and different kinds of visual agnosia...
April 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/28396142/atypical-binding-at-dopamine-and-serotonin-transporters-contribute-to-the-discriminative-stimulus-effects-of-mephedrone
#2
Alyssa F DeLarge, Laura L Erwin, Peter J Winsauer
Mephedrone (4-methylmethcathinone), a constituent of the recreational substances known as "bath salts", is a synthetic cathinone that can produce auditory and visual hallucinations, as well as problematic cardiovascular effects. This study compared the discriminative stimulus effects of mephedrone (0.32-10 mg/kg) with other prototypical drugs of abuse: cocaine (0.56-32 mg/kg), d-amphetamine (0.18-3.2 mg/kg), ketamine (1.8-18 mg/kg), phencyclidine (PCP, 1-5.6 mg/kg), heroin (1-10 mg/kg), 2,5-dimethoxy-4-iodoamphetamine (R-DOI, 0...
April 7, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28384730/intractable-epilepsy-and-progressive-cognitive-decline-in-a-young-man
#3
Alexander L Cohen, Lyell K Jones, Joseph E Parisi, James P Klaas
A young man with normal neurodevelopment presented with 3 years of medically refractory, progressive epilepsy and myoclonus. Initial examination included neuroimaging, electroencephalography, and biochemical analyses, all of which were unremarkable except for mildly enlarged ventricles. Over the following year, the patient experienced rapid cognitive decline with new-onset recurrent visual hallucinations and progressive lethargy. Results of subsequent electroencephalography and brain imaging were unchanged, and a fluorodeoxyglucose F 18 positron emission tomographic scan was normal...
April 3, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28376850/depressive-symptoms-among-survivors-of-ebola-virus-disease-in-conakry-guinea-preliminary-results-of-the-postebogui-cohort
#4
Mamady Mory Keita, Bernard Taverne, Sékou Sy Savané, Laura March, Morifodé Doukoure, Mamadou Saliou Sow, Abdoulaye Touré, Jean François Etard, Moumié Barry, Eric Delaporte
BACKGROUND: The 2013-2016 West African Ebola outbreak infected 28,616 people and caused 11,310 deaths by 11 May 2016, across six countries. The outbreak has also resulted in the largest number of EVD survivors in history-over 17,000. Guinea was declared Ebola-free on 1 June 2016. Reports from the outbreak documented 3814 cases resulting in 2544 deaths and 1270 survivors. EVD survivors face various neuropsychological and psycho-affective alterations that have not been fully identified yet...
April 4, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28367346/gland-new-psychosis-new-onset-adult-psychosis-with-suicidal-ideation-and-attempt-in-the-setting-of-thyroid-storm
#5
Esteban Cota, Jacob Lentz
We present a case of new onset psychosis in the setting of thyroid storm in a woman with no previous psychiatric history. The patient presented with ongoing suicidal ideation, a suicide attempt that was interrupted by her husband, and audio and visual hallucinations. The patient was placed on a psychiatric hold and treated for thyrotoxicosis as well as psychosis. Treatment of the thyroid hormone overload resulted in a rapid resolution of her symptoms; she was discharged in excellent condition, and she has had no repeat hallucinations or self-injury ideation or attempts since...
2017: Case Reports in Psychiatry
https://www.readbyqxmd.com/read/28365635/lesson-of-the-month-2-a-choroid-plexus-papilloma-manifesting-as-anorexia-nervosa-in-an-adult
#6
Prateush Singh, Asim Khan, Georgia Scott, Manuel Jasper, Esha Singh
A Caucasian female previously diagnosed with anorexia nervosa was referred by psychiatric services to the general medical team. She presented with dehydration, vomiting, weakness, a body mass index of 13 kg/m(2) and was treated with intravenous and enteral supplementation. During admission her vomiting worsened and she developed visual hallucinations and confabulation. Neurological examination demonstrated cerebellar signs and bilateral papilloedema on fundoscopy. Subsequent magnetic resonance imaging of the brain revealed a large fourth ventricular tumour causing obstructive hydrocephalus...
April 2017: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/28361209/correlation-between-clinical-symptoms-and-striatal-dat-uptake-in-patients-with-dlb
#7
Soichiro Shimizu, Disuke Hirose, Nayuta Namioka, Hidekazu Kanetaka, Kentaro Hirao, Hirokuni Hatanaka, Naoto Takenoshita, Yoshitsugu Kaneko, Yusuke Ogawa, Takahiko Umahara, Hirofumi Sakurai, Haruo Hanyu
OBJECTIVE: It is widely known that there is low striatal (123)I-FP-CIT dopamine transporter-single photon emission tomography (DAT-SPECT) uptake in patients with dementia with Lewy bodies (DLB). We assessed the correlation between symptom and regional low DAT uptake in the striatum. METHODS: Patients with Alzheimer's disease (AD) (n = 95) and patients with DLB (n = 133) who underwent DAT-SPECT were enrolled. We examined the correlation between symptoms [cognitive function decline, fluctuations, visual hallucinations, parkinsonism, and REM sleep behavior disorder (RBD)] and regional striatal DAT uptake in the patients with DLB...
March 30, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28361069/posterior-reversible-encephalopathy-syndrome-associated-with-left-horizontal-gaze-palsy
#8
Amer Hawatmeh, Sarah Studyvin, Moh'd Al-Halawani, Sawsan Amireh, Mohammad Thawabi
Posterior reversible encephalopathy syndrome (PRES) is characterized by rapid onset of symptoms including headache, seizures, altered consciousness, and visual disturbance, as well as radiologic findings of focal reversible vasogenic edema. Multiple visual disturbances have been described in PRES, such as hemianopia, visual neglect, auras, visual hallucinations, and cortical blindness. However, horizontal gaze palsy has not been previously reported. We report a 72-year-old female who presented with blurred vision, severe headache, lethargy, and later developed seizures...
March 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28344806/auditory-and-visual-hallucinations-after-influenza-vaccine-a-case-report
#9
Stefania Antoniazzi, Carla Carnovale, Aurelio Sessa, Marta Gentili, Marco Matacena, Maurizia Punginelli, Emilio Clementi, Sonia Radice
No abstract text is available yet for this article.
February 2017: Therapeutic Advances in Vaccines
https://www.readbyqxmd.com/read/28332250/visual-hallucinations-in-patients-with-acute-stroke-a-prospective-exploratory-study
#10
E Morenas-Rodríguez, P Camps-Renom, A Pérez-Cordón, A Horta-Barba, M Simón-Talero, E Cortés-Vicente, D Guisado-Alonso, E Vilaplana, C García-Sánchez, A Gironell, C Roig, R Delgado-Mederos, J Martí-Fàbregas
BACKGROUND AND PURPOSE: The incidence, underlying physiopathology, features and association with lesion topography of visual hallucinations in acute stroke have scarcely been investigated. METHODS: Patients with a diagnosis of acute stroke (ischaemic or haemorrhagic) in any vascular territory, admitted within 24 h after the onset of symptoms, were consecutively included in the study. Patients with a previous history of psychosis or cognitive impairment were excluded...
May 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28326948/rare-presentation-of-intrathecal-morphine-withdrawal-psychosis
#11
Rohit Aiyer, Vivek Jain, Anurag Bhatia, Boris Mekinulov, Semih Gungor
We report a case of a 57-year-old male patient with intrathecal morphine pump failure who presented with psychosis as part of a clinical presentation of opioid withdrawal. The patient was being treated for chronic back pain with an intrathecal morphine pump for several years. The patient spontaneously started to experience psychotic symptoms which included disorganized thinking, delusional thoughts, paranoia, auditory and visual hallucinations. Upon interrogation of intrathecal pump, it was found not to be functioning, thereby not delivering intrathecal morphine...
February 28, 2017: Pain Management
https://www.readbyqxmd.com/read/28315846/risk-factors-for-early-psychosis-in-pd-insights-from-the-parkinson-s-progression-markers-initiative
#12
Dominic H Ffytche, Joana B Pereira, Clive Ballard, K Ray Chaudhuri, Daniel Weintraub, Dag Aarsland
BACKGROUND: Parkinson's Disease (PD) psychosis refers to the spectrum of illusions, formed hallucinations and delusions that occur in PD. Visual hallucinations and illusions are thought to be caused by specific cognitive and higher visual function deficits and patients who develop such symptoms early in the disease course have greater rates of cognitive decline and progression to dementia. To date, no studies have investigated whether such deficits are found prior to the onset of PD psychosis...
April 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28314070/long-lasting-effects-of-chronic-heavy-cannabis-abuse
#13
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...
March 17, 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28295599/gender-difference-in-the-association-and-presentation-of-visual-hallucinations-in-dementia-with-lewy-bodies-a-cross-sectional-study
#14
Pai-Yi Chiu, Po-Ren Teng, Cheng-Yu Wei, Chein-Wei Wang, Chun-Tang Tsai
OBJECTIVE: Visual hallucinations (VHs) are among the most striking features of dementia with Lewy bodies (DLB). We investigated gender differences in the association and presentation of VHs in DLB. METHODS: A cross-sectional analysis of baseline data from a prospective, longitudinal study on dementia was performed. Cumulative frequency, 1-month frequency, and phenomenology of VHs were summarized and compared between female and male patients with DLB. Gender differences in the factors associated with VHs were investigated in patients with and without hallucinations...
March 13, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28294710/behavioral-disconnection-syndrome-manifesting-as-combined-mania-and-visual-auditory-hallucinations-secondary-to-isolated-right-thalamic-hemorrhage
#15
Parunyou Julayanont, Doungporn Ruthirago, Khondoker Alam, Yazan J Alderazi
No abstract text is available yet for this article.
March 15, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28289175/teaching-neuroimages-a-spiritual-visual-hallucination-from-a-right-parieto-occipital-seizure-ictal-guardian-angel
#16
Victoria S S Wong, Marissa A Kellogg
No abstract text is available yet for this article.
March 14, 2017: Neurology
https://www.readbyqxmd.com/read/28287968/style-transfer-via-texture-synthesis
#17
Michael Elad, Peyman Milanfar
Style transfer is a process of migrating a style from a given image to the content of another, synthesizing a new image, which is an artistic mixture of the two. Recent work on this problem adopting convolutional neural-networks (CNN) ignited a renewed interest in this field, due to the very impressive results obtained. There exists an alternative path toward handling the style transfer task, via the generalization of texture synthesis algorithms. This approach has been proposed over the years, but its results are typically less impressive compared with the CNN ones...
May 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28285770/visual-hallucinations-in-neurodegenerative-diseases-focus-on-selective-tissue-vulnerability
#18
EDITORIAL
Jared T Hinkle, Gregory M Pontone
No abstract text is available yet for this article.
February 14, 2017: American Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28284903/ocular-and-visual-disorders-in-parkinson-s-disease-common-but-frequently-overlooked
#19
REVIEW
Merel S Ekker, Sabine Janssen, Klaus Seppi, Werner Poewe, Nienke M de Vries, Thomas Theelen, Jorik Nonnekes, Bastiaan R Bloem
Patients with Parkinson's disease (PD) often compensate for their motor deficits by guiding their movements visually. A wide range of ocular and visual disorders threatens the patients' ability to benefit optimally from visual feedback. These disorders are common in patients with PD, yet they have received little attention in both research and clinical practice, leading to unnecessary - but possibly treatable - disability. Based on a literature search covering 50 years, we review the range of ocular and visual disorders in patients with PD, and classify these according to anatomical structures of the visual pathway...
February 21, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28282630/differences-in-the-symptom-profile-of-methamphetamine-related-psychosis-and-primary-psychotic-disorders
#20
Rebecca McKetin, Amanda L Baker, Sharon Dawe, Alexandra Voce, Dan I Lubman
We examined the lifetime experience of hallucinations and delusions associated with transient methamphetamine-related psychosis (MAP), persistent MAP and primary psychosis among a cohort of dependent methamphetamine users. Participants were classified as having (a) no current psychotic symptoms, (n=110); (b) psychotic symptoms only when using methamphetamine (transient MAP, n=85); (c) psychotic symptoms both when using methamphetamine and when abstaining from methamphetamine (persistent MAP, n=37), or (d) meeting DSM-IV criteria for lifetime schizophrenia or mania (primary psychosis, n=52)...
May 2017: Psychiatry Research
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