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Transient Global Amnesia

Young Ho Park, Jeong-Youn Kim, SangHak Yi, Jae-Sung Lim, Jae-Won Jang, Chang-Hwan Im, SangYun Kim
Acute perturbation of the hippocampus, one of the connector hubs in the brain, is a key step in the pathophysiological cascade of transient global amnesia (TGA). We tested the hypothesis that network efficiency, meaning the efficiency of information exchange over a network, is impaired during the acute stage of TGA. Graph theoretical analysis was applied to resting-state EEG data collected from 21 patients with TGA. The EEG data were obtained twice, once during the acute stage (< 24 hours after symptom onset) and once during the resolved stage (> 2 months after symptom onset) of TGA...
2016: PloS One
Md Asiful Islam, Fahmida Alam, Mohammad Amjad Kamal, Kah Keng Wong, Teguh Haryo Sasongko, Siew Hua Gan
Neurological manifestations or disorders associated with central nervous system (CNS) are one of the most common as well as important clinical characteristics of antiphospholipid syndrome (APS). Although in the last updated (2006) classification criteria of APS its neurological manifestations encompassed only transient ischemic attack (TIA) and stroke, diverse 'non-criteria' neurological disorders or manifestations (headache, migraine, bipolar disorder, transverse myelitis, dementia, chorea, epileptic seizures, multiple sclerosis, psychosis, cognitive impairment, Tourette's syndrome, parkinsonism, dystonia, transient global amnesia, obsessive compulsive disorder and leukoencephalopathy) have been observed in APS patients...
September 20, 2016: CNS & Neurological Disorders Drug Targets
Yeonsil Moon, Jeeyoung Oh, Kyoung Ja Kwon, Seol-Heui Han
Transient global amnesia is a well-described clinical syndrome; however, the pathophysiology is perplexing. Structural imaging indicates that punctuate hippocampal lesions are the representative pathophysiology, although functional neuroimaging studies have reported that the various regions comprising the episodic memory network are involved. We hypothesized that the neuronal integrity of the memory network might correlate with amnesia symptoms when there is any insult that can affect the hippocampus. Diffusion tensor images of 5 patients with variable diffusion-weighted imaging findings with or without transient global amnesia symptoms were analyzed...
September 15, 2016: Journal of the Neurological Sciences
Bom Sahn Kim, Sang Soo Cho, Joon Young Choi, Young Hwan Kim
PURPOSE: Transient global amnesia (TGA) is characterized by sudden loss of memory of recent events, transient inability to retain new information, and retrograde amnesia. We investigated the changes of regional cerebral blood flow in patients with TGA shortly after symptom onset and after recovery using Tc-99m-ethyl cysteinate dimer single-photon emission computed tomography (Tc-99m ECD SPECT) and statistical parametric mapping (SPM) analysis. METHODS: Six right-handed patients with TGA were studied using Tc-99m ECD SPECT shortly after symptom onset and after recovery...
September 2016: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
Hongzhou Duan, Liang Li, Yang Zhang, Jiayong Zhang, Ming Chen, Shengde Bao
Introduction. Transient global amnesia (TGA) following angiography is rare, and the pathogenesis has not been illustrated clearly till now. The aim of this research is to explore the pathogenesis of TGA following angiography by analyzing our data and reviewing the literature. Methods. We retrospectively studied 20836 cases with angiography in our hospital between 2007 and 2015 and found 9 cases with TGA following angiography. The data of these 9 cases were analyzed. Results. We found all 9 cases with TGA following neural angiography (5 in 4360) or cardiac angiography (4 in 8817) and no case with TGA following peripheral angiography (0 in 7659)...
2016: BioMed Research International
Jeremy Samuel Faust, Andreea Nemes
Transient global amnesia is a clinically distinct syndrome characterized by the acute inability to form new memories. It can last up to 24 hours. The diagnosis is dependent on eliminating other more serious etiologies including toxic ingestions, acute strokes, complex partial seizures, and central nervous system infections. Transient global amnesia confers no known long-term risks; however, when abnormal signs or symptoms are present, they take precedence and guide the formulation of a differential diagnosis and investigation...
August 2016: Emergency Medicine Practice
David R Spiegel, Aidan L Mccroskey, Branden A Deyerle
Transient global amnesia is a clinical syndrome characterized by the sudden onset of anterograde amnesia, accompanied by repetitive questioning, sometimes with a retrograde component, lasting up to 24 hours, without compromise of other neurologic function. Neuroimaging after an acutetransient global amnesia event often shows transient perturbation of specific hippocampal circuits that are involved in memory processing. Critical clinical distinctions, such as between transient global amnesia and other forms of transient amnesic episodes, as well as important clues to the underlying pathophysiologies are herein reviewed...
March 2016: Innovations in Clinical Neuroscience
Cristiano Correia Bacarin, Jaqueline Godinho, Rúbia Maria Weffort de Oliveira, Makoto Matsushita, Aline Kirie Gohara, Lúcio Cardozo-Filho, Jéssica de Carvalho Lima, Isolde Santos Previdelli, Silvana Regina Melo, Matheus Henrique Dal Molin Ribeiro, Humberto Milani
We reported that fish oil (FO) prevented the loss of spatial memory caused by transient, global cerebral ischemia (TGCI), provided the treatment covered the first days prior to and after ischemia. Continuing these studies, trained rats were subjected to TGCI, and FO was administered for 10days, with a time window of efficacy (TWE) of 4, 8 or 12h post-ischemia. Retrograde memory was assessed up to 43days after TGCI. In another experiment, ischemic rats received FO with a 4- or 12-h TWE, and dendritic density was assessed in the hippocampus and cerebral cortex...
September 15, 2016: Behavioural Brain Research
Jon Foss-Skiftesvik, Agneta Henriette Snoer, Aase Wagner, John Hauerberg
Transient global amnesia is considered a very rare complication of diagnostic cerebral angiography, and has been reported only in a limited number of case reports more than 15 years ago. We describe a patient experiencing transient global amnesia following cerebral digital subtraction angiography. While the condition by definition is self-limiting, its differential diagnoses may cause severe morbidity and/or mortality if left untreated. It is therefore important to build and maintain awareness of transient global amnesia as a possible complication of cerebral angiography...
2014: Radiology case reports
Cristina Tiu, Elena Oana Terecoasă, Nicolae Grecu, Bogdan Dorobăţ, Andreea Nicoleta Marinescu, Ovidiu Alexandru Băjenaru
Transient global amnesia is now considered a very rare complication of cerebral angiography. Various etiological mechanisms have been suggested to account for this complication, but no consensus has been reached yet. This case report documents one of the few reported cases of cerebral angiography-related transient global amnesia associated with magnetic resonance imaging (MRI) evidence of unilateral hippocampal ischemia, most probably as a consequence of a transient reduction in regional hippocampal blood flow...
May 2016: Medicine (Baltimore)
Ophir Keret, Nirit Lev, Tzippy Shochat, Israel Steiner
BACKGROUND AND PURPOSE: Transient global amnesia (TGA) is a stereotypic condition characterized by anterograde and retrograde amnesia that typically resolves within 24 hours. The pathophysiology of TGA is still unclear. We noted that patients hospitalized with TGA tend to appear in seasonal clusters, and decided to investigate this phenomenon. METHODS: Every patient with acute presentation of amnesia at our medical center is hospitalized for observation and evaluation...
April 19, 2016: Journal of Clinical Neurology
Kazuhiro Muramatsu, Takahito Yoshizaki
Transient amnesia is one of common clinical phenomenon of epilepsy that are encountered by physicians. The amnestic attacks are often associated with persistent memory disturbances. Epilepsy is common among the elderly, with amnesia as a common symptom and convulsions relatively uncommon. Therefore, amnesia due to epilepsy can easily be misdiagnosed as dementia. The term 'transient epileptic amnesia (TEA)' was introduced in the early 1990s by Kapur, who highlighted that amnestic attacks caused by epilepsy can be similar to those occurring in 'transient global amnesia', but are distinguished by features brevity and recurrence...
March 2016: Nihon Rinsho. Japanese Journal of Clinical Medicine
Ke Han, A-Ching Chao, Feng-Chi Chang, Hung-Yi Hsu, Chih-Ping Chung, Wen-Yung Sheng, Lung Chan, Jiang Wu, Han-Hwa Hu
In previous studies of transverse sinus (TS) hypoplasia, discrepancies between TS diameter measured by magnetic resonance venography (MRV) and contrast T1-weighted magnetic resonance (contrast T1) were observed. To investigate these discrepancies, and considering that TS hypoplasia is associated with neurological disorders, we performed a post hoc analysis of prospectively collected data from 3 case-control studies on transient global amnesia (TGA), transient monocular blindness (TMB), and panic disorders while retaining the original inclusion and exclusion criteria...
March 2016: Medicine (Baltimore)
Edoardo Ferlazzo, Chiara Sueri, Sara Gasparini, Umberto Aguglia
Epilepsy represents the third most common neurological disorders in the elderly after cerebrovascular disorders and dementias. The incidence of new-onset epilepsy peaks in this age group. The most peculiar aetiologies of late-onset epilepsy are stroke, dementia, and brain tumours. However, aetiology remains unknown in about half of the patients. Diagnosis of epilepsy may be challenging due to the frequent absence of ocular witnesses and the high prevalence of seizure-mimics (i.e. transient ischemic attacks, syncope, transient global amnesia or vertigo) in the elderly...
April 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
Roxane Langlois, Sven Joubert, Sophie Benoit, Valérie Dostie, Isabelle Rouleau
Ribot's law refers to the better preservation of remote memories compared with recent ones that presumably characterizes retrograde amnesia. Even if Ribot-type temporal gradient has been extensively studied in retrograde amnesia, particularly in Alzheimer's disease (AD), this pattern has not been consistently found. One explanation for these results may be that rehearsal frequency rather than remoteness accounts for the better preservation of these memories. Thus, the aim of present study was to address this question by studying retrograde semantic memory in subjects with amnestic mild cognitive impairment (aMCI) (n = 20), mild AD (n = 20) and in healthy older controls (HC; n = 19)...
2016: Journal of Alzheimer's Disease: JAD
Kelsey Flynn, Pascale Lavoie, Robert Laforce
No abstract text is available yet for this article.
2014: International Journal of Case Reports and Images
A David Rothner, Sumit Parikh
PURPOSE: To provide an overview of the clinical course for children and adolescents with migraine variants (M.V.), childhood periodic syndromes or the episodic syndromes that may be associated with migraine using the International Classification of Headache Disorders, 3rd Edition Beta version [ICHD-3] International Headache Society criteria for the diagnosis of each disorder. METHOD: Migraine is a complex set of neurological symptoms. This review encompasses the subtypes of M...
January 2016: Headache
M Muthuraman, J Dohring, M Nahrwold, K G Mideksa, C V Chaitanya, N Margraf, J Raethjen, G Deuschl, T Bartsch
Transient global amnesia (TGA) is a rare neurological disorder with a sudden, temporary episode of memory loss which usually occurs in old age. The episodic loss of memory becomes normal after a stipulated time of approximately 24 hours. The precise pathology is not yet completely understood. Moreover, there is no proper neuroimaging method to assess this condition. In this study, the EEG was measured at two time points one with the occurrence of the episode (acute) and the second time point after the patient returns to the normal memory condition (follow-up)...
August 2015: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Ibtessam M Fahmy, Noha T Abokrysha, Sandra M Ahmed, Haidy M El-Shebawy
BACKGROUND: Idiopathic intracranial hypertension (IIH) is a clinical syndrome with no identified causative factor. Internal jugular valve incompetence (IJVI) has been linked to many neurological disorders such as idiopathic intracranial hypertension (IIH), transient global amnesia and cough-induced headache. Intact valves prevent efficiently retrograde flow into the internal jugular vein. AIM: The aim of this study is to evaluate the competence of the jugular vein valves and its relationship to age, BMI, opening CSF pressure and MRV findings in IIH patients...
January 15, 2016: Journal of the Neurological Sciences
Tomoki Nakamizo, Ippei Tsuzuki, Takashi Koide
Transient global amnesia (TGA) is a self-limited disease characterized by isolated amnesia, which resolves within 24 h. In contrast, posterior reversible encephalopathy syndrome (PRES) is a potentially life-threatening disease that usually presents with seizures, altered mental status, headache, and visual disturbances. It is characterized by reversible vasogenic edema that predominantly involves the parieto-occipital subcortical white matter as shown by neuroimaging studies. To date, there have been no reported cases of PRES with a clinical course resembling TGA...
2015: Case Reports in Neurological Medicine
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