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https://www.readbyqxmd.com/read/28628018/autoimmune-limbic-encephalitis-case-reports
#1
K Kobaidze, A Harrison, Y Burklin, V Patidar, M Riccardi
Limbic encephalitis (LE) is an autoimmune or paraneoplastic disease that affects the medial temporal lobes. The patient will usually present with cognitive impairment, psychiatric changes, and seizures. Autoimmune limbic encephalitis (LE) is a challenging diagnosis as it is not always included in the typical paraneoplastic/autoimmune panels. Anti-GAD antibodies are associated with various disease including type I diabetes mellitus, various autoimmune processes, some neoplastic and infectious diseases. Thus, it is not as specific as some of the antibodies causing LE...
May 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28622546/the-semiology-of-febrile-seizures-focal-features-are-frequent
#2
Michihiko Takasu, Tetsuo Kubota, Takeshi Tsuji, Hirokazu Kurahashi, Shingo Numoto, Kazuyoshi Watanabe, Akihisa Okumura
OBJECTIVE: To clarify the semiology of febrile seizures (FS) and to determine the frequency of FS with symptoms suggestive of focal onset. METHODS: FS symptoms in children were reported within 24h of seizure onset by the parents using a structured questionnaire consisting principally of closed-ended questions. We focused on events at seizure commencement, including changes in behavior and facial expression, and ocular and oral symptoms. We also investigated the autonomic and motor symptoms developing during seizures...
June 13, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28622391/neuronal-substrates-underlying-stress-resilience-and-susceptibility-in-rats
#3
Fabia Febbraro, Katrine Svenningsen, Thao Phuong Tran, Ove Wiborg
BACKGROUND: Stress and stressful life events have repeatedly been shown as causally related to depression. The Chronic Mild Stress rat model is a valid model of stress-induced depression. Like humans, rats display great heterogeneity in their response to stress and adversity. Hence some individuals are stress-sensitive and prone to develop depression-like behaviour in response to modest stressors, while others are stress-resilient and remain essentially symptom free. OBJECTIVES: Compared to the large body of research, which describes stress-induced maladaptive neurobiological changes, relatively little attention has been devoted to understand resiliency to stress...
2017: PloS One
https://www.readbyqxmd.com/read/28620292/dynamic-responses-in-brain-networks-to-social-feedback-a-dual-eeg-acquisition-study-in-adolescent-couples
#4
Ching-Chang Kuo, Thao Ha, Ashley M Ebbert, Don M Tucker, Thomas J Dishion
Adolescence is a sensitive period for the development of romantic relationships. During this period the maturation of frontolimbic networks is particularly important for the capacity to regulate emotional experiences. In previous research, both functional magnetic resonance imaging (fMRI) and dense array electroencephalography (dEEG) measures have suggested that responses in limbic regions are enhanced in adolescents experiencing social rejection. In the present research, we examined social acceptance and rejection from romantic partners as they engaged in a Chatroom Interact Task...
2017: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/28607170/oxytocin-and-serotonin-brain-mechanisms-in-the-non-human-primate
#5
Lefevre Arthur, Richard Nathalie, Jazayeri Mina, Beuriat Pierre-Aurélien, Fieux Sylvain, Zimmer Luc, Duhamel Jean-René, Sirigu Angela
Oxytocin is increasingly studied for its therapeutic potential in psychiatric disorders which are associated with the deregulation of several neurotransmission systems. Studies in rodents demonstrated that the interaction between oxytocin (OT) and serotonin (5-HT) is critical for several aspects of social behavior. Using PET-scan in humans we have recently found that 5-HT 1A receptor (5-HT1AR) function is modified after intra-nasal oxytocin intake. However, the underlying mechanism between OT and 5-HT remains unclear...
June 12, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28602856/genetic-resistance-to-kindling-associated-with-alterations-in-circuit-function
#6
M Tansel Kendirli, Edward H Bertram
How a seizure spreads from a focal onset zone to other regions of the brain is not well understood, and animal studies suggest that there is a genetic influence. To understand how genetic factors may influence seizure spread, we examined whether the kindling resistance of WAG/Rij rats, which are slow to develop kindled motor seizures, is independent of the site of seizure induction and thus a global phenomenon, or whether it is circuit specific. We compared the kindling rates (number of stimulations to induce kindled motor seizures) of WAG/Rij rats to the rates of kindling in Sprague Dawley rats...
June 9, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28601961/basal-ganglia-movement-disorders-and-deep-brain-stimulation-advances-made-through-non-human-primate-research
#7
REVIEW
Thomas Wichmann, Hagai Bergman, Mahlon R DeLong
Studies in non-human primates (NHPs) have led to major advances in our understanding of the function of the basal ganglia and of the pathophysiologic mechanisms of hypokinetic movement disorders such as Parkinson's disease and hyperkinetic disorders such as chorea and dystonia. Since the brains of NHPs are anatomically very close to those of humans, disease states and the effects of medical and surgical approaches, such as deep brain stimulation (DBS), can be more faithfully modeled in NHPs than in other species...
June 10, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28595749/negative-emotional-verbal-memory-biases-in-mild-cognitive-impairment-and-late-onset-depression
#8
Linda Mah, Nicole D Anderson, Nicolaas Paul L G Verhoeff, Bruce G Pollock
OBJECTIVE: Early and preferential targeting of limbic structures by Alzheimer disease (AD)-related pathology suggests emotion dysregulation may serve as a marker of AD risk. We studied emotional verbal memory in two groups at risk for AD, amnestic mild cognitive impairment (aMCI) and late-onset depression (LOD), to test the hypothesis that aMCI and LOD would be characterized by a negative bias in emotional memory, whereas cognitively normal (CN) adults would show the "positivity effect" associated with healthy aging...
May 8, 2017: American Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28588453/refining-the-role-of-5-ht-in-postnatal-development-of-brain-circuits
#9
REVIEW
Anne Teissier, Mariano Soiza-Reilly, Patricia Gaspar
Changing serotonin (5-hydroxytryptamine, 5-HT) brain levels during critical periods in development has long-lasting effects on brain function, particularly on later anxiety/depression-related behaviors in adulthood. A large part of the known developmental effects of 5-HT occur during critical periods of postnatal life, when activity-dependent mechanisms remodel neural circuits. This was first demonstrated for the maturation of sensory brain maps in the barrel cortex and the visual system. More recently this has been extended to the 5-HT raphe circuits themselves and to limbic circuits...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28567288/gad-antibody-associated-limbic-encephalitis-in-a-young-woman-with-apeced
#10
Anna Kopczak, Adrian-Minh Schumacher, Sandra Nischwitz, Tania Kümpfel, Günter K Stalla, Matthias K Auer
The autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) syndrome is a genetic disorder caused by a mutation in the autoimmune regulator (AIRE) gene. Immune deficiency, hypoparathyroidism and Addison's disease due to autoimmune dysfunction are the major clinical signs of APECED. We report on a 21-year-old female APECED patient with two inactivating mutations in the AIRE gene. She presented with sudden onset of periodic nausea. Adrenal insufficiency was diagnosed by means of the ACTH stimulation test...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28567026/fmri-study-of-neural-responses-to-implicit-infant-emotion-in-anorexia-nervosa
#11
Jenni Leppanen, Valentina Cardi, Yannis Paloyelis, Andy Simmons, Kate Tchanturia, Janet Treasure
Difficulties in social-emotional processing have been proposed to play an important role in the development and maintenance of anorexia nervosa (AN). Few studies, thus far, have investigated neural processes that underlie these difficulties, including processing emotional facial expressions. However, the majority of these studies have investigated neural responses to adult emotional display, which may be confounded by elevated sensitivity to social rank and threat in AN. Therefore, the aim of this study was to investigate the neural processes underlying implicit processing of positively and negatively valenced infant emotional display in AN...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28566144/the-anteroposterior-and-primary-to-posterior-limbic-ratios-as-mri-derived-volumetric-markers-of-alzheimer-s-disease
#12
Adolfo Jiménez-Huete, Susana Estévez-Santé
BACKGROUND/AIMS: Alzheimer's disease (AD) shows a characteristic pattern of brain atrophy, with predominant involvement of posterior limbic structures, and relative preservation of rostral limbic and primary cortical regions. We aimed to investigate the diagnostic utility of two gray matter volume ratios based on this pattern, and to develop a fully automated method to calculate them from unprocessed MRI files. PATIENTS AND METHODS: Cross-sectional study of 118 subjects from the ADNI database, including normal controls and patients with mild cognitive impairment (MCI) and AD...
July 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28562619/story-time-turbocharger-child-engagement-during-shared-reading-and-cerebellar-activation-and-connectivity-in-preschool-age-children-listening-to-stories
#13
John S Hutton, Kieran Phelan, Tzipi Horowitz-Kraus, Jonathan Dudley, Mekibib Altaye, Thomas DeWitt, Scott K Holland
Expanding behavioral and neurobiological evidence affirms benefits of shared (especially parent-child) reading on cognitive development during early childhood. However, the majority of this evidence involves factors under caregiver control, the influence of those intrinsic to the child, such as interest or engagement in reading, largely indirect or unclear. The cerebellum is increasingly recognized as playing a "smoothing" role in higher-level cognitive processing and learning, via feedback loops with language, limbic and association cortices...
2017: PloS One
https://www.readbyqxmd.com/read/28526294/central-amygdala-activation-of-extracellular-signal-regulated-kinase-1-and-age-dependent-changes-in-inflammatory-pain-sensitivity-in-mice
#14
Katelyn E Sadler, Nathan M Gartland, Jane E Cavanaugh, Benedict J Kolber
Aging populations are more sensitive to noxious stimuli as a result of altered somatosensory systems. In these experiments, we examined pain-like behaviors in young, middle-aged, and old mice during peripheral inflammation to determine if the same sensitivity exists in preclinical animal models. Immediately following injury, middle-aged and old mice exhibited more spontaneous pain-like behaviors than young mice, matching pain prevalence in clinical populations. Middle-aged and old mice also developed persistent mechanical hypersensitivity in the injured paw...
April 26, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28502529/mechanisms-underlying-the-early-risk-to-develop-anxiety-and-depression-a-translational-approach
#15
REVIEW
Ned H Kalin
Anxious temperament (AT) is an early life disposition that markedly increases the risk to develop stress related psychopathology such as anxiety and depressive disorders. Since anxiety and depression are common, and frequently have their onset early in life, a better understanding of the factors related to their childhood onset will facilitate the development of new more effective neurally informed interventions. A nonhuman primate (NHP) developmental model of childhood AT has been established, which has provided an understanding of the neural systems and molecular mechanisms mediating the development of AT...
May 11, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28500862/enhanced-tau-aggregation-in-the-presence-of-amyloid-%C3%AE
#16
Rachel E Bennett, Sarah L DeVos, Simon Dujardin, Bianca Corjuc, Rucha Gor, Jose Gonzalez, Allyson D Roe, Matthew P Frosch, Rose Pitstick, George A Carlson, Bradley T Hyman
Amyloid plaques and neurofibrillary tangles co-occur in Alzheimer disease, but with different topological and temporal patterns. Whether these two lesions are independent or pathobiologically related is uncertain. For example, amyloid deposition in the neocortex precedes the spread of tau neurofibrillary tangles from the limbic areas to the cortex. We examined the aggregation properties of tau isolated from human cases with early tau pathology (Braak II) with and without plaques. Using a well-established HEK cell biosensor assay, we show that tau from cases with plaques has an enhanced ability to induce tau aggregates compared to tau from cases without plaques...
July 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28497109/hippocampal-tnf%C3%AE-signaling-contributes-to-seizure-generation-in-an-infection-induced-mouse-model-of-limbic-epilepsy
#17
Dipan C Patel, Glenna Wallis, E Jill Dahle, Pallavi B McElroy, Kyle E Thomson, Raymond J Tesi, David E Szymkowski, Peter J West, Roy M Smeal, Manisha Patel, Robert S Fujinami, H Steve White, Karen S Wilcox
Central nervous system infection can induce epilepsy that is often refractory to established antiseizure drugs. Previous studies in the Theiler's murine encephalomyelitis virus (TMEV)-induced mouse model of limbic epilepsy have demonstrated the importance of inflammation, especially that mediated by tumor necrosis factor-α (TNFα), in the development of acute seizures. TNFα modulates glutamate receptor trafficking via TNF receptor 1 (TNFR1) to cause increased excitatory synaptic transmission. Therefore, we hypothesized that an increase in TNFα signaling after TMEV infection might contribute to acute seizures...
March 2017: ENeuro
https://www.readbyqxmd.com/read/28492457/the-role-of-amantadine-withdrawal-in-3-cases-of-treatment-refractory-altered-mental-status
#18
Leah D Fryml, Kristen R Williams, Christopher G Pelic, James Fox, Gregory Sahlem, Sophie Robert, Gonzalo J Revuelta, Edward Baron Short
Amantadine, which was originally developed as an antiviral medication, functions as a dopamine agonist in the central nervous system and consequently is utilized in the treatment of Parkinson disease, drug-induced extrapyramidal reactions, and neuroleptic malignant syndrome. For reasons that are not entirely understood, abrupt changes in amantadine dosage can produce a severe withdrawal syndrome. Existing medical literature describes case reports of amantadine withdrawal leading to delirium, which at times has progressed to neuroleptic malignant syndrome...
May 2017: Journal of Psychiatric Practice
https://www.readbyqxmd.com/read/28489322/developmental-effects-of-androgens-in-the-human-brain
#19
REVIEW
Tuong-Vi Nguyen
Neuroendocrine theories of brain development posit that androgens play a crucial role in sex-specific cortical growth, but little is known about the differential effects of testosterone and dehydroepiandrosterone (DHEA) on cortico-limbic development and cognition during adolescence. In this context, the NIH Study of Normal Brain Development, a longitudinal study of typically developing children and adolescents 4 to 24 years of age (n=433), offered a unique opportunity to examine the developmental effects of androgens on cortico-limbic maturation and cognition...
May 10, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28488261/use-of-tramadol-in-psychiatric-care-a-comprehensive-review-and-report-of-two-cases
#20
Ansgar Rougemont-Bücking, Franziska Gamma, Jaak Panksepp
Tramadol is widely prescribed for treating acute and chronic forms of pain. It is a weak mu-receptor opioid agonist and also increases concentrations of serotonin and noradrenaline within the limbic system of the brain. The therapeutic range of tramadol is relatively wide. Compared with other opioid agonists, there is little risk for developing tolerance and for abuse. Recent models of depression emphasise the subjective experience of a depressive mood as being, in part, a psychologically painful state. It is well established that psychological stress due to social separation/loss, disruption or be-trayal of pre-existent significant interpersonal bonds is mediated by the activation of the mammalian PANIC (separation-distress) system...
May 10, 2017: Swiss Medical Weekly
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