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Transient Global Amnesia

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Acute amnestic syndromes.

Lucas Alessandro, Mario Ricciardi, Hernán Chaves, Ricardo F Allegri,

Acute amnestic syndromes are usually rare clinical events occurring in emergency situations. Etiological diagnosis can be challenging and underlying causes diverse. They can be transient and totally reversible, or accompanied by other neurological symptoms resulting in serious and irreversible brain damage. Pathophysiology of these syndromes mainly corresponds to structural or ... Read more >>

J. Neurol. Sci. (Journal of the neurological sciences)
[2020, 413:116781]

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Factors determining recurrence in transient global amnesia.

Rebecca Tynas, Peter K Panegyres,

BACKGROUND:Aetiology of transient global amnesia (TGA) remains uncertain, though many have been proposed, including ischaemic, migrainous or epileptic pathologies. METHODS:We attempted to determine risk factors for TGA, as well as prognostic factors that may cause recurrence. We evaluated clinical history, family history and magnetic resonance diffusion-weighted imaging (DWI) studies of ... Read more >>

BMC Neurol (BMC neurology)
[2020, 20(1):83]

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Positive Magnetic Resonance Imaging Evidence of Transient Global Amnesia Following the Use of Sildenafil.

Kuan-Yu Lin, Mu-N Liu, Pei-Hsuan Wang, Chi Ieong Lau,

Transient global amnesia (TGA) has been proposed as a possible adverse effect of sildenafil. There are rare cases in the literature, but none had strong evidence to support. Our case is the first to demonstrate a focal punctate diffusion-weighted imaging lesion at the right hippocampus after the use of sildenafil. ... Read more >>

Clin Neuropharmacol (Clinical neuropharmacology)
[2020, 43(2):52-53]

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For how long is memory lost in transient global amnesia?

P Caramelli,

Eur. J. Neurol. (European journal of neurology)
[2020, :]

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Time trends, frequency, characteristics and prognosis of short-duration transient global amnesia.

M Romoli, M A Tuna, L Li, M Paciaroni, D Giannandrea, F Tordo Caprioli, A Lotti, P Eusebi, M G Mosconi, M Pellizzaro Venti, N Salvadori, A Gili, S Ricci, F Stracci, P Sarchielli, L Parnetti, P M Rothwell, P Calabresi,

BACKGROUND AND PURPOSE:Transient global amnesia (TGA) is characterized by a sudden onset of anterograde amnesia lasting up to 24 h. One major differential for TGA is transient epileptic amnesia, which typically lasts < 1 h. However, TGA can also be short in duration and little is known about the time trends, characteristics and prognosis ... Read more >>

Eur. J. Neurol. (European journal of neurology)
[2020, :]

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The involvement of TRP channels in memory formation and task retrieval in a passive avoidance task in one-day old chicks.

Andrzej Krolik, Dominik Diamandakis, Anna Zych, Aleksandra Stafiej, Elzbieta Salinska,

An increase in the intracellular Ca2+ level in neurons is one of the main steps in the memory formation cascade. The increase results from extracellular Ca2+ influx by activation of ionotropic glutamate receptors and release from intracellular stores by the stimulation of IP3 receptors (IP3Rs) via group I metabotropic glutamate ... Read more >>

Neurobiol Learn Mem (Neurobiology of learning and memory)
[2020, 171:107209]

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Serum cortisol levels in patients with a transient global amnesia.

R Schneckenburger, M Hainselin, F Viader, F Eustache, P Quinette,

Transient global amnesia (TGA) can be triggered by a high level of blood cortisol. We assessed whether patients had a higher level of cortisol during the TGA than shortly after. We included 52 patients, 21 with blood collected during the TGA episode and 31 shortly thereafter. We compared these two ... Read more >>

Rev. Neurol. (Paris) (Revue neurologique)
[2020, :]

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Challenges in the acute identification of mild traumatic brain injuries: results from an emergency department surveillance study.

Ilaria Pozzato, Susanne Meares, Annette Kifley, Ashley Craig, Mark Gillett, Kim Van Vu, Anthony Liang, Ian Cameron, Bamini Gopinath,

OBJECTIVES:To establish the proportion of mild traumatic brain injury (mTBI) diagnosis among people presenting to an emergency department (ED), to determine the accuracy of recorded ED diagnoses. We also aimed to describe challenges in mTBI case identification and its acute hospital management. DESIGN AND SETTING:A retrospective chart review of all ... Read more >>

BMJ Open (BMJ open)
[2020, 10(2):e034494]

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Transient Cerebral Ischemia at High Altitude and Hyper-Responsiveness to Hypoxia.

Jean-Paul Richalet, Philippe Larmignat, Patricia Poignard,

A 36-year-old woman with no medical history participated in a trekking in Ladakh up to 5300 m of altitude. She was well acclimatized and presented no previous sign of acute mountain sickness, high altitude pulmonary edema or high altitude cerebral edema. After an intense effort to catch up with her group, ... Read more >>

High Alt. Med. Biol. (High altitude medicine & biology)
[2020, 21(1):105-108]

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A controlled Valsalva Maneuver causes neither Diffusion-Positive Hippocampal Lesions nor Clinical Symptoms after Transient Global Amnesia.

Manuel Gomez-Choco, Ariel Fernando Mariaca, Christian Gaebel, José Manuel Valdueza,

Valsalva maneuver (VM) precedes frequently transient global amnesia (TGA) and up to 84% of the patients with TGA present hippocampal diffusion-weighted imaging-positive (DWI+) lesions on brain magnetic resonance imaging (MRI). We studied 20 patients with TGA and hippocampal DWI+ lesions. Median age (range) of the patients was 67 (57-80) years ... Read more >>

Eur. Neurol. (European neurology)
[2019, 82(4-6):113-115]

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Transient global amnesia with bilateral hippocampal lesions: report of two cases.

Alexis Demas, Clément Richard, Omar Bennani, Adèle Heranval, Jean Philippe Cochin, Yvan Vaschalde,

Acta Neurol Belg (Acta neurologica Belgica)
[2020, :]

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One Single Nucleotide Polymorphism of the TRPM2 Channel Gene Identified as a Risk Factor in Bipolar Disorder Associates with Autism Spectrum Disorder in a Japanese Population.

Naila Al Mahmuda, Shigeru Yokoyama, Toshio Munesue, Kenshi Hayashi, Kunimasa Yagi, Chiharu Tsuji, Haruhiro Higashida,

The transient receptor potential melastatin 2 (TRPM2) is a non-specific cation channel, resulting in Ca2+ influx at warm temperatures from 34 °C to 47 °C, thus including the body temperature range in mammals. TRPM2 channels are activated by β-NAD+, ADP-ribose (ADPR), cyclic ADPR, and 2'-deoxyadenosine 5'-diphosphoribose. It has been shown ... Read more >>

Diseases (Diseases (Basel, Switzerland))
[2020, 8(1):]

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Testing Navigation in Real Space: Contributions to Understanding the Physiology and Pathology of Human Navigation Control.

Florian Schöberl, Andreas Zwergal, Thomas Brandt,

Successful navigation relies on the flexible and appropriate use of metric representations of space or topological knowledge of the environment. Spatial dimensions (2D vs. 3D), spatial scales (vista-scale vs. large-scale environments) and the abundance of visual landmarks critically affect navigation performance and behavior in healthy human subjects. Virtual reality (VR)-based ... Read more >>

Front Neural Circuits (Frontiers in Neural Circuits)
[2020, 14:6]

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Transient epileptic amnesia with amygdala enlargement.

Takamichi Kanbayashi, Yuki Hatanaka, Masahiro Sonoo,

Neurol. Sci. (Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology)
[2019, :]

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Retrograde amnesia with transposition in the past: A neuropsychological and PET study of a case.

Dorothée Pouliquen, Mathieu Chastan, Evangéline Bliaux, Gaël Nicolas, Olivier Martinaud,

OBJECTIVE:Retrograde amnesia (RA) with a "transposition in the past" phenomenon has been rarely reported. Patients presenting disproportionate RA for all events over a defined period of time offer an opportunity to investigate the unclear relationship between autobiographical memory and the self, through the well-known self-memory system (SMS). METHOD:We report the ... Read more >>

Neuropsychology (Neuropsychology)
[2020, 34(2):235-245]

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Endothelial progenitor cells, potential biomarkers for diagnosis and prognosis of ischemic stroke: protocol for an observational case-control study.

Kamini Rakkar, Othman Othman, Nikola Sprigg, Philip Bath, Ulvi Bayraktutan,

Ischemic stroke is a devastating, life altering event which can severely reduce patient quality of life. Despite years of research there have been minimal therapeutic advances. Endothelial progenitor cells (EPCs), stem cells involved in both vasculogenesis and angiogenesis, may be a potential therapeutic target. After a stroke, EPCs migrate to ... Read more >>

Neural Regen Res (Neural regeneration research)
[2020, 15(7):1300-1307]

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Imaging Findings Related to the Valsalva Maneuver in Head and Neck Radiology.

A A Madhavan, C M Carr, M L Carlson, J I Lane,

Forced exhalation against a closed glottis, known as the Valsalva maneuver, is an important clinical diagnostic and therapeutic tool due to its physiologic effects. Several unique conditions and anatomic changes can occur with repetitive or acute changes in pressure from the Valsalva maneuver. We will discuss and review various pertinent ... Read more >>

AJNR Am J Neuroradiol (AJNR. American journal of neuroradiology)
[2019, 40(12):1987-1993]

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Concomitant reversible cerebral vasoconstriction syndrome and transient global amnesia.

Rosalie Boitet, Nicolas Gaillard, Eddine Bendiab, Lucas Corti, Caroline Roos, Jacques Reynes, Vincent Costalat, Caroline Arquizan, Anne Ducros,

BACKGROUND:Reversible cerebral vasoconstriction syndrome (RCVS) is a common cause of thunderclap headache (TCH), mainly recurrent, sometimes associated with seizures and/or neurological deficit. Association with amnesia is exceptional. We report a case series of RCVS concomitant with transient global amnesia (TGA) and propose pathophysiologic hypotheses. METHODS:We retrospectively reviewed clinical and radiological ... Read more >>

J. Neurol. (Journal of neurology)
[2020, 267(2):390-394]

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What remains after transient global amnesia (TGA)? An ultra-high field 7 T magnetic resonance imaging study of the hippocampus.

D Paech, T A Kuder, C Roßmanith, M Griebe, P Eisele, M Platten, M E Ladd, H-P Schlemmer, A Gass, K Szabo,

BACKGROUND AND PURPOSE:The aim was to study whether ultra-high field 7 T magnetic resonance imaging (MRI) can demonstrate chronic focal defects in the hippocampus corresponding to the former acute diffusion-weighted imaging (DWI) lesions and to assess chronic T2-hyperintense hippocampal lesion load in transient global amnesia (TGA) patients. METHODS:Follow-up of 7 ... Read more >>

Eur. J. Neurol. (European journal of neurology)
[2020, 27(2):406-409]

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Update on the prevalence of persistent post-traumatic headache in adult civilian traumatic brain injury: protocol for a systematic review and meta-analysis.

Caroline Arbour, Yasmine Bouferguene, Roxanne Beauregard, Gilles Lavigne, Alberto Herrero Babiloni,

INTRODUCTION:Traumatic brain injury (TBI) is a major public health concern. Persistent post-traumatic headache (PTH) is a common consequence of TBI affecting productivity and quality of life. The only review providing information about headache prevalence after TBI was published in 2008, combined data from civilian and military TBI, and was strictly ... Read more >>

BMJ Open (BMJ open)
[2020, 10(1):e032706]

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Postnatal development of the entorhinal cortex: A stereological study in macaque monkeys.

Olivia Piguet, Loïc J Chareyron, Pamela Banta Lavenex, David G Amaral, Pierre Lavenex,

The entorhinal cortex is the main gateway for interactions between the neocortex and the hippocampus. Distinct regions, layers, and cells of the hippocampal formation exhibit different profiles of structural and molecular maturation during postnatal development. Here, we provide estimates of neuron number, neuronal soma size, and volume of the different ... Read more >>

J. Comp. Neurol. (The Journal of comparative neurology)
[2020, :]

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Transient Global Amnesia in a 60-year-old female with Post-traumatic Stress Disorder.

Eduardo D Espiridion, Jayesh Gupta, Andre Bshara, Zachary Danssaert,

This is a case report involving a 60-year-old female who developed transient global amnesia (TGA) after an emotional psychotherapy session in the framework of post-traumatic stress disorder (PTSD). She presented to the local emergency room, three days after her psychotherapist appointment, with complaints of memory impairment. She and her husband ... Read more >>

Cureus (Cureus)
[2019, 11(9):e5792]

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Human hippocampal CA3 damage disrupts both recent and remote episodic memories.

Thomas D Miller, Trevor T-J Chong, Anne M Aimola Davies, Michael R Johnson, Sarosh R Irani, Masud Husain, Tammy Wc Ng, Saiju Jacob, Paul Maddison, Christopher Kennard, Penny A Gowland, Clive R Rosenthal,

Neocortical-hippocampal interactions support new episodic (event) memories, but there is conflicting evidence about the dependence of remote episodic memories on the hippocampus. In line with systems consolidation and computational theories of episodic memory, evidence from model organisms suggests that the cornu ammonis 3 (CA3) hippocampal subfield supports recent, but not ... Read more >>

Elife (eLife)
[2020, 9:]

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Emergency department visits for transient global amnesia alone or in association with substance abuse.

Concepción Moll Tudurí, Emilio José Salgado García, Daniel Santana Moreno, Ona Escoda Turón, Rosa Escoda Turón, Santiago Nogué Xarau,

OBJECTIVES:To study the epidemiology of emergency department visits for transient global amnesia (TGA) by itself or associated with substance abuse or sexual assault. MATERIAL AND METHODS:Retrospective study of cases treated from January to December 2018. Data for all patients with TGA were extracted, and cases were classified as associated with ... Read more >>

Emergencias (Emergencias : revista de la Sociedad Espanola de Medicina de Emergencias)
[2019, 31(5):341-345]

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Association of Previous Measles Infection With Markers of Acute Infectious Disease Among 9- to 59-Month-Old Children in the Democratic Republic of the Congo.

Hayley R Ashbaugh, James D Cherry, Nicole A Hoff, Reena H Doshi, Vivian H Alfonso, Adva Gadoth, Patrick Mukadi, Stephen G Higgins, Roger Budd, Christina Randall, Emile Okitolonda-Wemakoy, Jean Jacques Muyembe-Tamfum, Sue K Gerber, Anne W Rimoin,

BACKGROUND:Transient immunosuppression and increased susceptibility to other infections after measles infection is well known, but recent studies have suggested the occurrence of an "immune amnesia" that could have long-term immunosuppressive effects. METHODS:We examined the association between past measles infection and acute episodes of fever, cough, and diarrhea among 2350 children ... Read more >>

J Pediatric Infect Dis Soc (Journal of the Pediatric Infectious Diseases Society)
[2019, 8(6):531-538]

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