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Neurocognitive dysfunction

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https://www.readbyqxmd.com/read/29161395/postoperative-cognitive-dysfunction-and-dementia-what-we-need-to-know-and-do
#1
M J Needham, C E Webb, D C Bryden
Approximately 12% of apparently previously cognitively well patients undergoing anaesthesia and noncardiac surgery will develop symptoms of cognitive dysfunction after their procedure. Recent articles in this Journal have highlighted the difficulties of confirming any clear links between anaesthesia and cognitive dysfunction, in part because of the lack of consistency regarding definition and diagnosis. Postoperative cognitive dysfunction (POCD) is usually self-limiting and rarely persists in the longer term, although plausible biological mechanisms for an impact on brain protein deposition do exist...
December 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29158902/hypernatraemic-hypovolaemia-with-anaemia-an-unusual-presentation-of-primary-testicular-insufficiency
#2
Usman Javaid, Vikram Lal, Catherine Napier, Alison Burbridge, Richard Quinton
Hypogonadal men may experience intense vasomotor symptoms, and vasomotor sweating can occasionally be associated with profound fluid losses. We describe a 37-year-old male, who exhibited persistent hypovolaemic hypernatraemia that was challenging to treat despite a continuous high fluid input (>4-5 L/day). He was noted to have drenching sweats and normochromic anaemia. He had recent traumatic head injury, which resulted in neurocognitive dysfunction, so pituitary function tests were done which showed primary hypogonadism...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/29158267/methamphetamine-increases-hiv-infectivity-in-neural-progenitor-cells
#3
Marta Skowronska, Marisa McDonald, Martina Velichkovska, Ana Rachel Leda, Minseon Park, Michal Toborek
HIV-1 infection and methamphetamine (METH) abuse frequently occur simultaneously and may have synergistic pathological effects. Although HIV-positive/active METH users have been shown to have higher HIV viral loads and experience more severe neurological complications than non-users, the direct impact of METH on HIV infection and its link to the development of neurocognitive alternations are still poorly understood. In the present study, we hypothesized that METH impacts HIV infection of neural progenitor cells (NPC) by a mechanism encompassing NFκB/SP1-mediated HIV-LTR activation...
November 20, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29154688/substance-use-and-cognitive-function-as-drivers-of-condomless-anal-sex-among-hiv-positive-gay-bisexual-and-other-men-who-have-sex-with-men-aged-50-and-older-the-gold-studies
#4
Sandra A Kupprat, Kristen D Krause, Danielle C Ompad, Perry N Halkitis
PURPOSE: Substance use has been linked to the sexual transmission of HIV among gay, bisexual, and other men who have sex with men (MSM) across the lifespan. Among older, HIV-positive, MSM populations, cognitive dysfunction associated with age and HIV disease progression also may play a role in sexual risk-taking. People aged 50 years and older represent a growing proportion of the overall HIV-positive population. This study aimed to explore relationships between substance use and cognitive function, and their impact on condomless anal sex (CAS) among HIV-positive gay, bisexual, and other MSM aged 50 years and older...
November 20, 2017: LGBT Health
https://www.readbyqxmd.com/read/29154132/dexmedetomidine-promotes-biomimetic-non-rapid-eye-movement-stage-3-sleep-in-humans-a-pilot-study
#5
Oluwaseun Akeju, Lauren E Hobbs, Lei Gao, Sara M Burns, Kara J Pavone, George S Plummer, Elisa C Walsh, Tim T Houle, Seong-Eun Kim, Matt T Bianchi, Jeffrey M Ellenbogen, Emery N Brown
OBJECTIVES: Sleep, which comprises of rapid eye movement (REM) and non-REM stages 1-3 (N1-N3), is a natural occurring state of decreased arousal that is crucial for normal cardiovascular, immune and cognitive function. The principal sedative drugs produce electroencephalogram beta oscillations, which have been associated with neurocognitive dysfunction. Pharmacological induction of altered arousal states that neurophysiologically approximate natural sleep, termed biomimetic sleep, may eliminate drug-induced neurocognitive dysfunction...
October 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29149154/philosophical-issues-and-psychological-variables-that-influence-the-determination-of-opioid-effectiveness-a-narrative-review
#6
Daniel Michael Doleys
BACKGROUND: The prescribing of opioids in the chronic pain setting is often based on the pharmacodynamics, pharmacokinetics, and pharmacogenetics of the drug obtained during development and clinical trials. However, the effectiveness of opioids varies widely and often appears to bear no relationship to the aforementioned variables. The impact of philosophical issues and psychological factors on determining how clinically effective opioid therapy is has often been over looked. OBJECTIVES: This manuscript provides a selective review and narrative summary of the philosophical issues and psychological factors which can influence opioid effectiveness...
November 2017: Pain Physician
https://www.readbyqxmd.com/read/29147885/proceedings-of-the-2017-isev-symposium-on-hiv-neurohiv-drug-abuse-evs
#7
Guoku Hu, Sowmya Yelamanchili, Fatah Kashanchi, Norman Haughey, Vincent C Bond, Kenneth W Witwer, Lynn Pulliam, Shilpa Buch
Despite the success of combination antiretroviral therapy (cART), there is increased prevalence of HIV-associated neurocognitive disorders (HAND) in HIV-1-infected individuals on cART, which poses a major health care challenge. Adding further complexity to this long-term antiretroviral use is the comorbidity with drugs of abuse such as morphine, cocaine, and methamphetamine, which can in turn, exacerbate neurologic and cognitive deficits associated with HAND. Furthermore, HIV proteins, such as the transactivator of transcription (Tat) and the envelope protein (gp120), as well as antiretrovirals themselves can also contribute to the progression of neurodegeneration underlying HAND...
November 16, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/29137271/environmental-conditions-differentially-affect-neurobehavioral-outcomes-in-a-mouse-model-of-sepsis-associated-encephalopathy
#8
Mu-Huo Ji, Hui Tang, Dan Luo, Li-Li Qiu, Min Jia, Hong-Mei Yuan, Shan-Wu Feng, Jian-Jun Yang
Brain dysfunction remains a common complication after sepsis development and is an independent risk factor for a poorer prognosis and an increased mortality. Here we tested the hypothesis that the behavioral outcomes after lipopolysaccharides (LPS) administration are exacerbated by an impoverished environment (IE) and alleviated by an enriched environment (EE), respectively. Mice were randomly allocated in a standard environment (SE), an EE, or an IE for 4 weeks after LPS or normal saline (NS) administration...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29128906/toll-like-receptor-3-mediates-hiv-1-induced-interleukin-6-expression-in-the-human-brain-endothelium-via-tak1-and-jnk-pathways-implications-for-viral-neuropathogenesis
#9
Biju Bhargavan, Georgette D Kanmogne
HIV-1-associated neurocognitive disorders (HAND) is associated with blood-brain-barrier (BBB) inflammation, and inflammation involves toll-like receptors (TLRs) signaling. It is not known whether primary human brain microvascular endothelial cells (HBMEC), the major BBB component, express TLRs or whether TLRs are involved in BBB dysfunction and HAND. We demonstrate that HBMEC express TLR3, 4, 5, 7, 9, and 10, and TLR3 was the most abundant. HIV-1 and TLR3 activation increased endothelial TLR3 transcription and expression...
November 11, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/29128371/assessments-of-neurocognitive-and-behavioral-function-in-the-mucopolysaccharidoses
#10
REVIEW
Elsa G Shapiro, Maria L Escolar, Kathleen A Delaney, John J Mitchell
The mucopolysaccharidoses (MPS) are a group of rare, inherited lysosomal storage disorders in which accumulation of glycosaminoglycans (GAGs) leads to progressive tissue and organ dysfunction. In addition to a variety of somatic signs and symptoms, patients with rapidly progressing MPS I (Hurler), II, III, and VII can present with significant neurological manifestations, including impaired cognitive abilities, difficulties in language and speech, behavioral abnormalities, sleep problems, and/or seizures. Neurological symptoms have a substantial impact on the quality of life of MPS patients and their families...
September 15, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29123473/neurobehavioral-abnormalities-associated-with-executive-dysfunction-after-traumatic-brain-injury
#11
REVIEW
Rodger Ll Wood, Andrew Worthington
Objective: This article will address how anomalies of executive function after traumatic brain injury (TBI) can translate into altered social behavior that has an impact on a person's capacity to live safely and independently in the community. Method: Review of literature on executive and neurobehavioral function linked to cognitive ageing in neurologically healthy populations and late neurocognitive effects of serious TBI. Information was collated from internet searches involving MEDLINE, PubMed, PyscINFO and Google Scholar as well as the authors' own catalogs...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29123218/identification-of-a-neurocognitive-mechanism-underpinning-awareness-of-chronic-tinnitus
#12
Krysta J Trevis, Chris Tailby, David B Grayden, Neil M McLachlan, Graeme D Jackson, Sarah J Wilson
Tinnitus (ringing in the ears) is a common auditory sensation that can become a chronic debilitating health condition with pervasive effects on health and wellbeing, substantive economic burden, and no known cure. Here we investigate if impaired functioning of the cognitive control network that directs attentional focus is a mechanism erroneously maintaining the tinnitus sensation. Fifteen people with chronic tinnitus and 15 healthy controls matched for age and gender from the community performed a cognitively demanding task known to activate the cognitive control network in this functional magnetic resonance imaging study...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29121642/limbic-system-damage-in-ms-mri-assessment-and-correlations-with-clinical-testing
#13
Jie Wen, Dmitriy A Yablonskiy, Amber Salter, Anne H Cross
Volume loss in some limbic region structures has been observed in multiple sclerosis (MS) patients. However, in vivo evaluation of existing tissue cellular microstructure integrity has received less attention. The goal of studies reported here was to quantitatively assess loss of limbic system volumes and tissue integrity, and to evaluate associations of these measures with cognitive and physical dysfunction in MS patients. Thirty-one healthy controls (HC) and 80 MS patients, including 32 relapsing remitting (RRMS), 32 secondary progressive (SPMS) and 16 primary progressive (PPMS), participated in this study...
2017: PloS One
https://www.readbyqxmd.com/read/29118856/sleep-disturbances-and-memory-impairment-among-pregnant-women-consuming-khat-an-under-recognized-problem
#14
Md Dilshad Manzar, Mohammed Salahuddin, Peter Sony, Tarekegn Tesfaye Maru, Seithikurippu R Pandi-Perumal, Adam Moscovitch, Ahmed S Bahammam
Khat (Catha edulis) is a evergreen flowering shrub that is cultivated at high altitudes, especially in East Africa and the southwest of the Arabian Peninsula. The plant contains alkaloids, of which cathinone and cathine have structural similarity and pharmacological action similar to amphetamines. The leaves are, therefore, consumed in some regions as a psychoactive stimulant due to cultural beliefs and misperceptions on the health benefits of khat consumption. This resulted in a growing prevalence of khat consumption among pregnant women...
October 2017: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/29110781/cerebrospinal-fluid-in-the-dementias
#15
Henrik Zetterberg, Jonathan D Rohrer, Jonathan M Schott
Alzheimer disease, vascular dementia, dementia with Lewy bodies, and frontotemporal dementia are the most common central nervous system disorders that cause progressive neurocognitive dysfunction and ultimately dementia. A number of biomarkers for pathologies reflecting each condition have been developed. Here, we review these and give an overview of the current state of practice and research regarding cerebrospinal fluid biomarkers for these disorders. The chapter discusses both established (most of which are tau- and amyloid β-related) and upcoming biomarkers and details, wherever appropriate, clinical use and differential diagnostics aspects...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29110115/dnm1l-variant-alters-baseline-mitochondrial-function-and-response-to-stress-in-a-patient-with-severe-neurological-dysfunction
#16
Kaley A Hogarth, Sheila R Costford, Grace Yoon, Neal Sondheimer, Jason T Maynes
Mitochondria play vital roles in brain development and neuronal activity, and mitochondrial dynamics (fission and fusion) maintain organelle function through the removal of damaged components. Dynamin-like protein-1 (DRP-1), encoded by DNM1L, is an evolutionarily conserved GTPase that mediates mitochondrial fission by surrounding the scission site in concentric ring-like structures via self-oligomerization, followed by GTPase-dependant constriction. Here, we describe the clinical characteristics and cellular phenotype of a patient with severe neurological dysfunction, possessing a homozygous DNM1L variant c...
November 6, 2017: Biochemical Genetics
https://www.readbyqxmd.com/read/29107872/inflammation-and-gut-brain-axis-link-obesity-to-cognitive-dysfunction-plausible-pharmacological-interventions
#17
REVIEW
Maite Solas, Fermin I Milagro, María J Ramírez, J Alfredo Martínez
Obesity prevalence is increasing steadily throughout the world's population in most countries and in parallel the prevalence of metabolic disorders including cardiovascular diseases and type 2 diabetes is also rising, but less is reported about excessive adiposity relationship with poorer cognitive performance, cognitive decline and dementia. Some human clinical studies have evidenced that obesity is related to the risk of the development of mild cognitive impairment, in the form of short-term memory and executive function deficits, as well as dementia and Alzheimer's disease...
November 3, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29103404/the-cerad-neuropsychological-assessment-battery-is-sensitive-to-alcohol-related-cognitive-deficiencies-in-elderly-patients-a-retrospective-matched-case-control-study
#18
Liane Kaufmann, Stefan Huber, Daniel Mayer, Korbinian Moeller, Josef Marksteiner
OBJECTIVES: Adverse effects of heavy drinking on cognition have frequently been reported. In the present study, we systematically examined for the first time whether clinical neuropsychological assessments may be sensitive to alcohol abuse in elderly patients with suspected minor neurocognitive disorder. METHODS: A total of 144 elderly with and without alcohol abuse (each group n=72; mean age 66.7 years) were selected from a patient pool of n=738 by applying propensity score matching (a statistical method allowing to match participants in experimental and control group by balancing various covariates to reduce selection bias)...
November 6, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/29096130/impaired-self-agency-inferences-in-schizophrenia-the-role-of-cognitive-capacity-and-causal-reasoning-style
#19
M Prikken, A van der Weiden, R S Kahn, H Aarts, N E M van Haren
BACKGROUND: The sense of self-agency, i.e., experiencing oneself as the cause of one's own actions, is impaired in patients with schizophrenia. Normally, inferences of self-agency are enhanced when actual outcomes match with pre-activated outcome information, where this pre-activation can result from explicitly set goals (i.e., goal-based route) or implicitly primed outcome information (i.e., prime-based route). Previous research suggests that patients show specific impairments in the prime-based route, implicating that they do not rely on matches between implicitly available outcome information and actual action-outcomes when inferring self-agency...
September 20, 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/29089977/post-electrical-or-lightning-injury-syndrome-a-proposal-for-an-american-psychiatric-association-s-diagnostic-and-statistical-manual-formulation-with-implications-for-treatment
#20
REVIEW
Christopher J Andrews, Andrew D Reisner, Mary Ann Cooper
In the past, victims of electrical and lightning injuries have been assessed in a manner lacking a systematic formulation, and against ad hoc criteria, particularly in the area of neuropsychological disability. In this manner patients have, for example, only been partially treated, been poorly or incorrectly diagnosed, and have been denied the full benefit of compensation for their injuries. This paper contains a proposal for diagnostic criteria particularly for the neuropsychological aspects of the post injury syndrome...
September 2017: Neural Regeneration Research
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