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Clinical neurophysiology

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https://www.readbyqxmd.com/read/28327942/evaluation-of-the-high-frequency-monopolar-stimulation-technique-for-mapping-and-monitoring-the-corticospinal-tract-in-patients-with-supratentorial-gliomas-a-proposal-for-intraoperative-management-based-on-neurophysiological-data-analysis-in-a-series-of-ninety
#1
Gerard Plans, Isabel Fernández-Conejero, Xavier Rifà-Ros, Alejandro Fernández-Coello, Aleix Rosselló, Andreu Gabarrós
BACKGROUND: Intraoperative identification and preservation of the corticospinal tract is often necessary for glioma resection. OBJECTIVE: To make a proposal for intraoperative management with the high-frequency monopolar stimulation technique for monitoring the corticospinal tract. METHODS: Ninety-two patients operated on with the assistance of the high-frequency monopolar stimulation. Clinical and neurophysiological data have been related with the motor status at 3 months to establish prognostic factors of motor deterioration...
January 13, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28327340/epileptic-activity-in-alzheimer-s-disease-causes-and-clinical-relevance
#2
REVIEW
Keith A Vossel, Maria C Tartaglia, Haakon B Nygaard, Adam Z Zeman, Bruce L Miller
Epileptic activity is frequently associated with Alzheimer's disease; this association has therapeutic implications, because epileptic activity can occur at early disease stages and might contribute to pathogenesis. In clinical practice, seizures in patients with Alzheimer's disease can easily go unrecognised because they usually present as non-motor seizures, and can overlap with other symptoms of the disease. In patients with Alzheimer's disease, seizures can hasten cognitive decline, highlighting the clinical relevance of early recognition and treatment...
April 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28326623/neurophysiological-assessment-of-acute-pain-in-infants-a-scoping-review-of-research-methods
#3
REVIEW
B Benoit, R Martin-Misener, A Newman, M Latimer, M Campbell-Yeo
A systematic scoping search to describe the neurophysiological methods used in infant acute pain assessment research was conducted. Of the 2411 abstracts screened, 19 articles were retained. Nine studies utilized near infrared spectroscopy (NIRS), two utilized functional magnetic resonance imaging (fMRI), and eight utilized electroencephalography (EEG). There was methodological variability in studies utilizing NIRS, whereas EEG and fMRI studies reported consistent methods. Of the eight EEG studies, six identified a nociceptive specific event-related potential...
March 22, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28323013/electroencephalographic-sensorimotor-rhythms-are-modulated-in-the-acute-phase-following-focal-vibration-in-healthy-subjects
#4
Susanna Lopez, Fabiano Bini, Claudio Del Percio, Franco Marinozzi, Claudia Celletti, Antonio Suppa, Raffaele Ferri, Emanuela Staltari, Filippo Camerota, Claudio Babiloni
Few minutes of focal vibration (FV) on limb muscles can improve motor control in neurological (stroke, Parkinson) patients for unknown underlying neurophysiological mechanisms. Here we hypothesized that in healthy volunteers this FV would increase excitability in the primary sensorimotor cortex (S1-M1) during an isometric contraction of the stimulated muscle. The design included an initial control condition with no FV stimulation (Baseline) as well as three short experimental sessions of FV and a Sham (fake) session in a pseudo-random order...
March 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28322476/optimizing-exposure-based-cbt-for-anxiety-disorders-via-enhanced-extinction-design-and-methods-of-a-multicentre-randomized-clinical-trial
#5
Ingmar Heinig, Andre Pittig, Jan Richter, Katrin Hummel, Isabel Alt, Kristina Dickhöver, Jennifer Gamer, Maike Hollandt, Katja Koelkebeck, Anne Maenz, Sophia Tennie, Christina Totzeck, Yunbo Yang, Volker Arolt, Jürgen Deckert, Katharina Domschke, Thomas Fydrich, Alfons Hamm, Jürgen Hoyer, Tilo Kircher, Ulrike Lueken, Jürgen Margraf, Peter Neudeck, Paul Pauli, Winfried Rief, Silvia Schneider, Benjamin Straube, Andreas Ströhle, Hans-Ulrich Wittchen
Exposure-based psychological interventions currently represent the empirically best established first line form of cognitive-behavioural therapy for all types of anxiety disorders. Although shown to be highly effective in both randomized clinical and other studies, there are important deficits: (1) the core mechanisms of action are still under debate, (2) it is not known whether such treatments work equally well in all forms of anxiety disorders, including comorbid diagnoses like depression, (3) it is not known whether an intensified treatment with more frequent sessions in a shorter period of time provides better outcome than distributed sessions over longer time intervals...
March 21, 2017: International Journal of Methods in Psychiatric Research
https://www.readbyqxmd.com/read/28322310/hormone-therapy-at-early-post-menopause-increases-cognitive-control-related-prefrontal-activity
#6
Romuald Girard, Elise Météreau, Julie Thomas, Michel Pugeat, Chen Qu, Jean-Claude Dreher
Clinical data have been equivocal and controversial as to the benefits to the brain and cognition of hormone therapy (HT) in postmenopausal women. Recent reevaluation of the role of estrogens proposed that HT may effectively prevent the deleterious effects of aging on cognition, and reduces the risks of dementia, including Alzheimer's disease, if initiated early at the beginning of menopause. Yet, little is known about the effects of HT on brain activation related to cognitive control, the ability to make flexible decisions in relation to internal goals...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28321564/an-update-on-migraine-current-understanding-and-future-directions
#7
Francesca Puledda, Roberta Messina, Peter J Goadsby
Migraine is a common brain disorder with high disability rates which involves a series of abnormal neuronal networks, interacting at different levels of the central and peripheral nervous system. An increase in the interest around migraine pathophysiology has allowed researchers to unravel certain neurophysiological mechanisms and neurotransmitter involvement culminating in the recent development of novel therapies, which might substantially change the clinical approach to migraine patients. The present review will highlight the current aspects of migraine pathophysiology, covering an understanding of the complex workings of the migraine state and the brain regions responsible for them...
March 20, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28321307/a-cola-induced-hypokalemic-rhabdomyolysis-with-electromyographic-evaluation-a-case-report
#8
Davide Ferrazzoli, Annarita Sabetta, Grazia Palamara, Luca Caremani, Marina Capobianco, Pietro Balbi, Giuseppe Frazzitta
OBJECTIVE: To report a rare case of hypokalemic rhabdomyolysis induced by the heavy and prolonged ingestion of cola-based beverages, and its uneventful recovery after kalemia normalization. METHODS: We report a 38-year-old Caucasian male presented in our emergency room with a recent and progressive weakness of the lower limbs proximal muscles. RESULTS: A dietary history revealed a prolonged ingestion of cola-based beverages. Blood tests showed severe hypokalemia and marked increase in serum creatine phosphokinase...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28319876/redefining-periodic-patterns-on-electroencephalograms-of-patients-with-sporadic-creutzfeldt-jakob-disease
#9
Jung-Won Shin, Byeongsoo Yim, Seung Hun Oh, Nam Keun Kim, Sang Kun Lee, Ok-Joon Kim
OBJECTIVE: We aimed to redefine various periodic patterns (PPs) observed on electroencephalography (EEG) in patients with sporadic Creutzfeldt-Jakob disease (sCJD) using the American Clinical Neurophysiology Society's (ACNS) Criteria. METHODS: We analyzed EEG data of 23 patients with sCJD were admitted to two university hospitals between August 2005 and September 2015. RESULTS: We classified PPs on EEG data into three types: irregular periodic discharges (PDs) with superimposed rhythmic activities, appearing at a median of 8weeks after onset (w...
February 5, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28314518/the-interface-between-chronic-fatigue-syndrome-and-depression-a-psychobiological-and-neurophysiological-conundrum
#10
Derek Larkin, Colin R Martin
The chronic fatigue syndrome (CFS) remains a contentious and controversial presentation despite decades of systematic research from a variety of medical specialties and associated disciplines. Variously championed as a condition of immunological, neurological, neurophysiological, psychiatric or psychological origin, consensus on a cogent and evidenced-based pathway has yet to be achieved. Irrespective of the ambiguity regarding aetiology, what is incontrovertible is the experience of significant depression, which often accompanies this most distressing clinical presentation...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28303912/new-technologies-for-the-assessment-of-neuropathies
#11
REVIEW
Roberto Gasparotti, Luca Padua, Chiara Briani, Giuseppe Lauria
Technical advances are rapidly changing the clinical and instrumental approach to peripheral nerve diseases. Magnetic resonance neurography, diffusion tensor imaging and nerve ultrasonography are increasingly entering the diagnostic workup of peripheral neuropathies as tools that complement neurophysiology and enable investigation of proximal structures, such as plexuses and roots. Progress in the design of magnetic resonance scanners and sequences, and the development of high-frequency ultrasound probes mean that high-resolution peripheral nerve imaging is possible, enabling detailed examination of nerve size, morphology and internal fascicular structure that can integrate nerve conduction studies into clinical practice...
March 17, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28296376/-lafora-disease-presentation-two-cases-in-a-mexican-family
#12
María Guadalupe González-De la Rosa, Edith Alva-Moncayo
Myoclonic epilepsy, described in 1911 by Lafora and Glueck, is an autosomal recessive hereditary clinical-pathological entity, which begins at the end of childhood or during adolescence, presents atypical absences, generalized and atonic tonic-clonic seizures, which can evolve to the epileptic state. The diagnosis is confirmed trough the skin biopsy or trough determination of the protein laforine. In this paper we present the initial case of a patient in whom we confirm the diagnosis of progressive myoclonic epilepsy and in particular the Lafora disease, which due to the symptomatology and the knowledge of the case we were able to detect her sister's disease...
March 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28289600/conflict-processing-in-juvenile-patients-with-neurofibromatosis-type-1-nf1-and-healthy-controls-two-pathways-to-success
#13
Annet Bluschke, Maja von der Hagen, Katharina Papenhagen, Veit Roessner, Christian Beste
Neurofibromatosis Type 1 (NF1) is a monogenetic autosomal-dominant disorder with a broad spectrum of clinical symptoms and is commonly associated with cognitive deficits. Patients with NF1 frequently exhibit cognitive impairments like attention problems, working memory deficits and dysfunctional inhibitory control. The latter is also relevant for the resolution of cognitive conflicts. However, it is unclear how conflict monitoring processes are modulated in NF1. To examine this question in more detail, we used a system neurophysiological approach combining high-density ERP recordings with source localisation analyses in juvenile patients with NF1 and controls during a flanker task...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28284465/neurological-disorders-in-liver-transplant-candidates-pathophysiology-and-clinical-assessment
#14
REVIEW
Paolo Feltracco, Annachiara Cagnin, Cristiana Carollo, Stefania Barbieri, Carlo Ori
Compromised liver function, as a consequence of acute liver insufficiency or severe chronic liver disease may be associated with various neurological syndromes, which involve both central and peripheral nervous system. Acute and severe hyperammoniemia inducing cellular metabolic alterations, prolonged state of "neuroinflammation", activation of brain microglia, accumulation of manganese and ammonia, and systemic inflammation are the main causative factors of brain damage in liver failure. The most widely recognized neurological complications of serious hepatocellular failure include hepatic encephalopathy, diffuse cerebral edema, Wilson disease, hepatic myelopathy, acquired hepatocerebral degeneration, cirrhosis-related Parkinsonism and osmotic demyelination syndrome...
February 27, 2017: Transplantation Reviews
https://www.readbyqxmd.com/read/28284239/integrating-self-localization-proprioception-pain-and-performance
#15
Valeria Bellan, Sarah B Wallwork, Alberto Gallace, Charles Spence, G Lorimer Moseley
The ability to know where our own body and body parts are in space is often taken for granted, yet it is of fundamental importance for the majority of our everyday activities, let alone high performance activities such as dancing. This review focuses on the concept of self-localization, the monitoring of the space surrounding one's body, and the disruptions that occur in the presence of pain. A conceptual model is presented of the cortical body matrix with which to consider self-localization; also provided are its historical context, underlying assumptions, and current limitations...
March 1, 2017: Journal of Dance Medicine & Science
https://www.readbyqxmd.com/read/28283593/mutations-in-noncoding-regions-of-gjb1-are-a-major-cause-of-x-linked-cmt
#16
Pedro J Tomaselli, Alexander M Rossor, Alejandro Horga, Zane Jaunmuktane, Aisling Carr, Paola Saveri, Giuseppe Piscosquito, Davide Pareyson, Matilde Laura, Julian C Blake, Roy Poh, James Polke, Henry Houlden, Mary M Reilly
OBJECTIVE: To determine the prevalence and clinical and genetic characteristics of patients with X-linked Charcot-Marie-Tooth disease (CMT) due to mutations in noncoding regions of the gap junction β-1 gene (GJB1). METHODS: Mutations were identified by bidirectional Sanger sequence analysis of the 595 bases of the upstream promoter region, and 25 bases of the 3' untranslated region (UTR) sequence in patients in whom mutations in the coding region had been excluded...
March 10, 2017: Neurology
https://www.readbyqxmd.com/read/28282235/artifacts-during-short-term-interictal-electroencephalographic-recording-in-dogs
#17
Alberto Cauduro, Maurizio Dondi, Paolo Favole, Mauro Opreni, Lucia Antonietta Simonetto, Valentina Lorenzo
The electroencephalogram (EEG) is an electrodiagnostic technique widely used in both scientific research and clinical medicine. It makes it possible to study the neurophysiology of brain activity by recording real-time changes in electrical potential produced by cortical activation. The importance of EEG in diagnosing canine epilepsy demonstrates its usefulness when the owner's description of crises is not clear or when the episodes cannot be differentiated from behavioral or cardiac disorders. However, EEG recordings also often record electrical activity from sources other than the brain, which may interfere with the clinical event-related signal...
March 2017: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/28277465/understanding-the-neurophysiology-and-quantification-of-brain-perfusion
#18
Elizabeth Tong, Leo Sugrue, Max Wintermark
Newer neuroimaging technology has moved beyond pure anatomical imaging and ventured into functional and physiological imaging. Perfusion magnetic resonance imaging (PWI), which depicts hemodynamic conditions of the brain at the microvascular level, has an increasingly important role in clinical central nervous system applications. This review provides an overview of the established role of PWI in brain tumor and cerebrovascular imaging, as well as some emerging applications in neuroimaging. PWI allows better characterization of brain tumors, grading, and monitoring...
March 8, 2017: Topics in Magnetic Resonance Imaging: TMRI
https://www.readbyqxmd.com/read/28273990/neurological-manifestations-in-systemic-lupus-erythematosus-a-single-centre-study-from-north-east-india
#19
Sanjeeb Kakati, Bhupen Barman, Sobur U Ahmed, Masaraf Hussain
INTRODUCTION: Neurological manifestations although common in Systemic Lupus Erythematosus (SLE), are often not recognized due to their diversed and varied presentation. Therefore, the study was planned to highlight the pattern of neurological involvement in SLE to help in early recognition. AIM: To study the pattern of neurological involvement in SLE and its correlation with disease activity and different investigation. MATERIALS AND METHODS: This hospital based prospective observational study was carried out from August 2009 to July 2010...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28269781/cognitive-efficiency-in-alzheimer-s-disease-is-associated-with-increased-occipital-connectivity
#20
Matteo De Marco, Davide Duzzi, Francesca Meneghello, Annalena Venneri
There are cognitive domains which remain fully functional in a proportion of Alzheimer's disease (AD) patients. It is unknown, however, what distinctive mechanisms sustain such efficient processing. The concept of "cognitive efficiency" was investigated in these patients by operationalizing it as a function of the level of performance shown on the Letter Fluency test, on which, very often, patients in the early stages of AD show unimpaired performance. Forty-five individuals at the prodromal/early stage of AD (diagnosis supported by subsequent clinical follow-ups) and 45 healthy controls completed a battery of neuropsychological tests and an MRI protocol which included resting-state acquisitions...
March 2, 2017: Journal of Alzheimer's Disease: JAD
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