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Temporal lobe epilepsy and memory

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https://www.readbyqxmd.com/read/27903764/epilepsy-and-music-practical-notes
#1
REVIEW
M Maguire
Music processing occurs via a complex network of activity far beyond the auditory cortices. This network may become sensitised to music or may be recruited as part of a temporal lobe seizure, manifesting as either musicogenic epilepsy or ictal musical phenomena. The idea that sound waves may directly affect brain waves has led researchers to explore music as therapy for epilepsy. There is limited and low quality evidence of an antiepileptic effect with the Mozart Sonata K.448. We do not have a pathophysiological explanation for the apparent dichotomous effect of music on seizures...
November 30, 2016: Practical Neurology
https://www.readbyqxmd.com/read/27896315/altered-oscillatory-dynamics-of-ca1-parvalbumin-basket-cells-during-theta-gamma-rhythmopathies-of-temporal-lobe-epilepsy
#2
Diego Lopez-Pigozzi, François Laurent, Jorge R Brotons-Mas, Mario Valderrama, Manuel Valero, Ivan Fernandez-Lamo, Elena Cid, Daniel Gomez-Dominguez, Beatriz Gal, Liset Menendez de la Prida
Recent reports in human demonstrate a role of theta-gamma coupling in memory for spatial episodes and a lack of coupling in people experiencing temporal lobe epilepsy, but the mechanisms are unknown. Using multisite silicon probe recordings of epileptic rats engaged in episodic-like object recognition tasks, we sought to evaluate the role of theta-gamma coupling in the absence of epileptiform activities. Our data reveal a specific association between theta-gamma (30-60 Hz) coupling at the proximal stratum radiatum of CA1 and spatial memory deficits...
November 2016: ENeuro
https://www.readbyqxmd.com/read/27886629/transient-epileptic-amnesia-over-twenty-years-long-term-follow-up-of-a-case-series-with-three-detailed-reports
#3
Sharon A Savage, Christopher R Butler, John R Hodges, Adam Z Zeman
PURPOSE: Transient Epileptic Amnesia (TEA) is a form of adult onset temporal lobe epilepsy characterised by ictal amnesia. The amnesic seizures are often accompanied by interical memory disturbance, involving autobiographical amnesia and accelerated long-term forgetting. Short-term follow-up studies suggest a relatively stable cognitive profile once treated, but recent case reports raise concerns regarding the risk of developing Alzheimer's disease (AD). The current study reports clinical and cognitive outcome in TEA patients over a 20-year period...
November 14, 2016: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/27865173/accelerated-cognitive-decline-in-a-rodent-model-for-temporal-lobe-epilepsy
#4
Sandra Schipper, Marlien W Aalbers, Kim Rijkers, Melanie Lagiere, Jan G Bogaarts, Arjan Blokland, Sylvia Klinkenberg, Govert Hoogland, Johan S H Vles
OBJECTIVE: Cognitive impairment is frequently observed in patients with temporal lobe epilepsy. It is hypothesized that cumulative seizure exposure causes accelerated cognitive decline in patients with epilepsy. We investigated the influence of seizure frequency on cognitive decline in a rodent model for temporal lobe epilepsy. METHODS: Neurobehavioral assessment was performed before and after surgery, after the induction of self-sustaining limbic status epilepticus (SSLSE), and in the chronic phase in which rats experienced recurrent seizures...
November 16, 2016: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/27816897/epileptic-networks-in-patients-with-bitemporal-epilepsy-the-role-of-seeg-for-the-selection-of-good-surgical-candidates
#5
REVIEW
L Di Vito, F Mauguière, H Catenoix, S Rheims, P Bourdillon, A Montavont, J Isnard
OBJECTIVE: In this study we investigated the electrical characteristics of seizures recorded by stereo-EEG (SEEG) in a cohort of patients with bitemporal lobe epilepsy (BTLE), in the attempt to verify the presence/absence of different seizure patterns and to identify good surgical candidates. METHODS: We retrospectively reviewed 14 consecutive patients with medically refractory BTLE confirmed by scalp video-EEG (VEEG) recording of bitemporal independent or non-lateralizing seizure onset...
October 24, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27810518/social-cognition-in-juvenile-myoclonic-epilepsy
#6
Filippo S Giorgi, Melania Guida, Lorenzo Caciagli, Cristina Pagni, Chiara Pizzanelli, Enrica Bonanni, Gloria Tognoni, Ubaldo Bonuccelli
OBJECTIVE: Juvenile Myoclonic Epilepsy (JME) is a common genetic generalized epilepsy syndrome. Several studies have detailed cognitive and imaging abnormalities pointing to frontal lobe dysfunction, as well as disadvantageous behavioral traits and poor social outcome, challenging the commonly held view of JME being a benign disorder. Social cognition is the ability to elaborate mental representations of social interactions and to use them correctly in social contexts, and includes Theory of Mind (ToM), which pertains to the attribution of cognitive and affective mental states to self and others and seems to rely on complex fronto-temporal interactions...
October 26, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27756511/why-epilepsy-challenges-social-life
#7
Bettina K Steiger, Hennric Jokeit
Social bonds are at the center of our daily living and are an essential determinant of our quality of life. In people with epilepsy, numerous factors can impede cognitive and affective functions necessary for smooth social interactions. Psychological and psychiatric complications are common in epilepsy and may hinder the processing of social information. In addition, neuropsychological deficits such as slowed processing speed, memory loss or attentional difficulties may interfere with enjoyable reciprocity of social interactions...
October 11, 2016: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/27736661/postictal-alterations-induced-by-intrahippocampal-injection-of-pilocarpine-in-c57bl-6-mice
#8
Isabel Vieira de Assis Lima, Alline Cristina de Campos, Paula Maria Quaglio Bellozi, Juliana Guimaraes Doria, Fabiola Mara Ribeiro, Marcio Flavio Dutra Moraes, Antonio Carlos Pinheiro de Oliveira
Temporal lobe epilepsy (TLE) is the most common form of epilepsy in adults. The pilocarpine (PILO) experimental model of TLE portrays behavioral and pathophysiological changes in rodents that are very similar to those found in humans with TLE. However, this model is associated with an unfortunate high mortality rate. Studies have shown that intrahippocampal injection of PILO, while having a much smaller mortality rate, induces status epilepticus (SE) that secondarily leads to TLE. To the best of our knowledge, the present study was the first to evaluate the cognitive and histological alterations 72h after intrahippocampal microinjection of PILO in C57BL/6 mice...
October 10, 2016: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/27736656/declarative-long-term-memory-and-the-mesial-temporal-lobe-insights-from-a-5-year-postsurgery-follow-up-study-on-refractory-temporal-lobe-epilepsy
#9
Gerardo Salvato, Pina Scarpa, Stefano Francione, Roberto Mai, Laura Tassi, Elisa Scarano, Giorgio Lo Russo, Gabriella Bottini
It is largely recognized that the mesial temporal lobe and its substructure support declarative long-term memory (LTM). So far, different theories have been suggested, and the organization of declarative verbal LTM in the brain is still a matter of debate. In the current study, we retrospectively selected 151 right-handed patients with temporal lobe epilepsy with and without hippocampal sclerosis, with a homogeneous (seizure-free) clinical outcome. We analyzed verbal memory performance within a normalized scores context, by means of prose recall and word paired-associate learning tasks...
November 2016: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/27731507/remembrance-and-time-passed-memory-outcomes-4-11-years-after-pediatric-epilepsy-surgery
#10
Klajdi Puka, Mary Lou Smith
OBJECTIVE: Little is known about the long-term cognitive outcomes following pediatric epilepsy surgery. Although the evidence for change within the first 2 years is not compelling, the plasticity of the immature brain may allow for improvements in the long term. This study examined memory function in a cohort of surgical and nonsurgical patients at baseline and 4-11 years after. METHOD: Participants were 88 patients (mean age 20.05, standard deviation [SD] 4.21 years) with childhood-onset intractable epilepsy; 53 had undergone resective epilepsy surgery...
November 2016: Epilepsia
https://www.readbyqxmd.com/read/27723659/contralateral-hippocampal-stimulation-for-failed-unilateral-anterior-temporal-lobectomy-in-patients-with-bilateral-temporal-lobe-epilepsy
#11
Ping Ding, Shaohui Zhang, Junchen Zhang, Xiaohong Hu, Xiaoman Yu, Shuangshuang Liang, Chao Gao, Shuli Liang
AIMS: To prospectively study the surgical outcomes of unilateral anterior temporal lobectomy (ATL) in patients with intractable bilateral temporal lobe epilepsy (TLE) as well as two-staged contralateral hippocampal stimulation in patients after failed unilateral ATL. METHODS: Eighteen carefully selected patients with bilateral TLE underwent unilateral ATL. Five cases with failed ATL underwent two-staged contralateral hippocampal stimulation. Seizure control and changes in intelligence quotient (IQ), memory quotient, and quality of life (QOL) were analyzed 2-5 years after treatment...
2016: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/27721992/assessing-a-metacognitive-account-of-associative-memory-impairments-in-temporal-lobe-epilepsy
#12
Nathan A Illman, Steven Kemp, Céline Souchay, Robin G Morris, Chris J A Moulin
Previous research has pointed to a deficit in associative recognition in temporal lobe epilepsy (TLE). Associative recognition tasks require discrimination between various combinations of words which have and have not been seen previously (such as old-old or old-new pairs). People with TLE tend to respond to rearranged old-old pairs as if they are "intact" old-old pairs, which has been interpreted as a failure to use a recollection strategy to overcome the familiarity of two recombined words into a new pairing...
2016: Epilepsy Research and Treatment
https://www.readbyqxmd.com/read/27717669/the-lgi1-adam22-protein-complex-in-synaptic-transmission-and-synaptic-disorders
#13
Yuko Fukata, Norihiko Yokoi, Yuri Miyazaki, Masaki Fukata
Physiological functioning of the brain requires fine-tuned synaptic transmission, and its dysfunction causes various brain disorders such as autism, dementia, and epilepsy. It is therefore extremely important to identify and characterize key regulators of synaptic function. In particular, disease-related synaptic proteins, such as autism-related neurexin-neuroligin and psychiatric disorder-related NMDA receptor, have attracted considerable attention. Recent basic and clinical research has highlighted critical roles of a ligand-receptor complex, LGI1-ADAM22, in synaptic transmission and brain function, as mutations in the LGI1 gene cause autosomal dominant lateral temporal lobe epilepsy and autoantibodies to LGI1 cause limbic encephalitis which is characterized by memory loss and seizures...
October 4, 2016: Neuroscience Research
https://www.readbyqxmd.com/read/27688159/safety-and-seizure-control-in-patients-with-mesial-temporal-lobe-epilepsy-treated-with-regional-superselective-intra-arterial-injection-of-autologous-bone-marrow-mononuclear-cells
#14
Jaderson C DaCosta, Mirna W Portuguez, Daniel R Marinowic, Lucas P Schilling, Carolina M Torres, Danielle I DaCosta, Maria Júlia M Carrion, Eduardo F Raupp, Denise C Machado, Ricardo B Soder, Silvia L Lardi, Bernardo Garicochea
Temporal lobe epilepsy (TLE) is a highly prevalent syndrome among people with epilepsy, and is usually refractory to drug treatment. Structural and physiological changes, such as hippocampal sclerosis, are often present in TLE patients. The objective of this study is to evaluate the feasibility and safety of intra-arterial infusion of autologous bone marrow mononuclear cells (BMMC) in adults with medically refractory mesial temporal lobe epilepsy (MTLE) and unilateral hippocampal sclerosis (MTLE-HS). We enrolled 20 patients that had been diagnosed with MTLE-HS and refractory to medical treatment...
September 29, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27677727/neuropsychological-performance-and-seizure-control-after-subsequent-anteromesial-temporal-lobe-resection-following-selective-amygdalohippocampectomy
#15
Thomas Sauvigny, Katja Brückner, Lasse Dührsen, Oliver Heese, Manfred Westphal, Stefan R G Stodieck, Tobias Martens
OBJECTIVE: Selective amygdalohippocampectomy (sAHE) is a well-established treatment for temporal lobe epilepsy, commonly with favorable neuropsychological outcome. Yet, it is still unknown if subsequent resection of the anteromesial temporal lobe (AMTLR), when necessary, deteriorates neuropsychological performance in this selected group of patients. Thus, we evaluated the clinical and neuropsychological data of patients who, due to insufficient seizure control after sAHE, received a subsequent ipsilateral AMTLR and compared these findings with patients who did not receive a second resection (control group)...
November 2016: Epilepsia
https://www.readbyqxmd.com/read/27665526/the-retrieval-of-perceptual-memory-details-depends-on-right-hippocampal-integrity-and-activation
#16
Marie St-Laurent, Morris Moscovitch, Mary Pat McAndrews
We assessed whether perceptual richness, a defining feature of episodic memory, depends on the engagement and integrity of the hippocampus during episodic memory retrieval. We tested participants' memory for complex laboratory events (LEs) that differed in perceptual content: short stories were either presented as perceptually rich film clips or as perceptually impoverished narratives. Participants underwent functional magnetic resonance imaging (fMRI) while retrieving these LEs (narratives and clips), as well as events from their personal life (autobiographical memories)...
August 27, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27664194/cognitive-function-and-heat-shock-protein-70-in-children-with-temporal-lobe-epilepsy
#17
Azza M Oraby, Ehab R Abdol Raouf, Mostafa M El-Saied, Maha K Abou-Khadra, Suzette I Helal, Adel F Hashish
We conducted the present study to examine cognitive function and serum heat shock protein 70 levels among children with temporal lobe epilepsy. The Stanford-Binet Intelligence Test was carried out to examine cognitive function in 30 children with temporal lobe epilepsy and 30 controls. Serum heat shock protein 70 levels were determined with an enzyme-linked immunosorbent assay. The epilepsy group had significantly lower cognitive function testing scores and significantly higher serum heat shock protein 70 levels than the control group; there were significant negative correlations between serum heat shock protein 70 levels and short-term memory and composite scores...
September 23, 2016: Journal of Child Neurology
https://www.readbyqxmd.com/read/27628031/the-temporal-instability-of-resting-state-network-connectivity-in-intractable-epilepsy
#18
Lucy F Robinson, Xiaosong He, Paul Barnett, Gaёlle E Doucet, Michael R Sperling, Ashwini Sharan, Joseph I Tracy
OBJECTIVE: Focal epilepsies, such as temporal lobe epilepsy (TLE), are known to disrupt network activity in areas outside the epileptogenic zone [Tracy et al., 2015]. We devised a measure of temporal instability of resting state functional connectivity (FC), capturing temporal variations of BOLD correlations between brain regions that is less confounded than the "sliding window" approach common in the literature. METHODS: We investigated healthy controls and unilateral TLE patients (right and left seizure focus groups), utilizing group ICA to identify the default mode network (DMN), a network associated with episodic memory, a key cognitive deficit in TLE...
September 15, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27601154/seizure-freedom-after-limited-hippocampal-radiofrequency-thermocoagulation
#19
Han-Tao Li, Ching-Yi Lee, Siew-Na Lim, Chun-Wei Chang, Shih-Tseng Lee, Tony Wu
BACKGROUND: Surgical interventions are often used for freedom from seizure in patients with drug-resistant mesial temporal lobe epilepsy. A patient with seizure foci in the left mesiotemporal region underwent limited-size stereotactic radiofrequency thermocoagulation (RF-TC) over the left hippocampus. CASE DESCRIPTION: A 37-year-old woman with febrile convulsion in her childhood was admitted to our neurologic department with complex partial seizure with secondary generalization...
September 4, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27585986/cognitive-changes-in-people-with-temporal-lobe-epilepsy-over-a-13-year-period
#20
Rūta Mameniškienė, Justė Rimšienė, Roma Puronaitė
OBJECTIVES: The aims of our study were to evaluate cognitive decline in people with temporal lobe epilepsy over a period of 13years and to determine what clinical and treatment characteristics may have been associated with these. MATERIALS AND METHODS: Thirty-three individuals with temporal lobe epilepsy underwent the same neuropsychological assessment of verbal and nonverbal memory, attention, and executive functions using the same cognitive test battery as one used 13years ago...
October 2016: Epilepsy & Behavior: E&B
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