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Clinical neurophysiology

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https://www.readbyqxmd.com/read/29225535/myoclonus-after-cardiac-arrest-where-do-we-go-from-here
#1
Brin Freund, Peter W Kaplan
Prognostication after cardiac arrest often depends primarily on neurological function, and characterizing the extent of neurological injury hinges on neurophysiological testing and clinical neurological examination. The presence of early posthypoxic myoclonus (PHM) following cardiac arrest had been invariably associated with poor outcome, but more recent studies have shown that those with early PHM may survive with good neurological function. Electroencephalographic patterns suggestive of severe brain injury may be more valuable than the presence of PHM itself in portending poor functional status, and phenotyping PHM may also be useful in delineating benign and malignant forms...
September 2017: Epilepsy Currents
https://www.readbyqxmd.com/read/29217407/can-we-predict-intermediate-syndrome-a-review
#2
REVIEW
Chanika Alahakoon, Tharaka Lagath Dassanayake, Indika Bandara Gawarammana, Vajira Senaka Weerasinghe
INTRODUCTION: Ingestion of organophosphorus insecticides (OPI) is a common method of deliberate self harm in the developing world. Deaths mainly follow as a result of the respiratory failure associated with both cholinergic crisis and the intermediate syndrome. Even though death can be prevented by early mechanical ventilation of these patients, limited studies are available regarding the prediction of intermediate syndrome and subsequent respiratory failure. OBJECTIVE: To systematically review articles that are published with regard to possible prediction of intermediate syndrome using clinical, biochemical and electrophysiological parameters...
December 4, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/29214617/gehs-neurophysiological-classification-system-for-patients-with-neuropathy-of-the-ulnar-nerve-at-the-elbow
#3
David G Greathouse, Greg Ernst, John S Halle, Scott W Shaffer
BACKGROUND: Neuropathy of the ulnar nerve at the elbow is one of a number of muscle-related and nerve-related disorders that affect people performing intensive work with their hands and upper extremities, and is the second most prevalent peripheral nerve mononeuropathy. There are several classification systems currently being used by the medical community for patients with neuropathy of the ulnar nerve at the elbow. However, few of these classification systems include the clinical electrophysiologic parameters nerve conduction (NCS) and electromyographic (EMG) studies...
October 2017: U.S. Army Medical Department Journal
https://www.readbyqxmd.com/read/29213090/evaluation-of-short-interval-cortical-inhibition-and-intracortical-facilitation-from-the-dorsolateral-prefrontal-cortex-in-patients-with-schizophrenia
#4
Yoshihiro Noda, Mera S Barr, Reza Zomorrodi, Robin F H Cash, Faranak Farzan, Tarek K Rajji, Robert Chen, Zafiris J Daskalakis, Daniel M Blumberger
GABAergic and glutamatergic dysfunction in the dorsolateral prefrontal cortex (DLPFC) are thought to be the core pathophysiological mechanisms of schizophrenia. Recently, we have established a method to index these functions from the DLPFC using the paired transcranial magnetic stimulation (TMS) paradigms of short interval intracortical inhibition (SICI) and facilitation (ICF) combined with electroencephalography (EEG). In this study, we aimed to evaluate neurophysiological indicators related to GABAA and glutamate receptor-mediated functions respectively from the DLPFC in patients with schizophrenia using these paradigms, compared to healthy controls...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29212917/rhythmic-arm-cycling-training-improves-walking-and-neurophysiological-integrity-in-chronic-stroke-the-arms-can-give-legs-a-helping-hand-in-rehabilitation
#5
Chelsea Kaupp, Gregory Ep Pearcey, Taryn Klarner, Yao Sun, Trevor S Barss, Hilary Cullen, E Paul Zehr
Training locomotor pattern generating networks (CPGs) through arm and leg cycling improves walking in chronic stroke. These outcomes are presumed to result from enhanced interlimb connectivity and CPG function. The extent to which rhythmic arm training activates interlimb CPG networks for locomotion remains unclear and was assessed by studying chronic stroke participants before and after 5-weeks of arm cycling training. Strength was assessed bilaterally via maximal voluntary isometric contractions in the legs and hands...
December 6, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29203503/multicentre-prospective-randomised-single-blind-controlled-study-protocol-of-the-effect-of-an-additional-parent-administered-sensorimotor-stimulation-on-neurological-development-of-preterm-infants-primebrain
#6
Karine Pelc, Irit Daniel, Bernard Wenderickx, Bernard Dan
INTRODUCTION: Preterm and very low birthweight infants are at increased risk for neurodevelopmental disorders, including cerebral palsy, sensory impairment and intellectual disability. Several early intervention approaches have been designed in the hope of optimising neurological development in this context. It seems important that the intervention takes into account parental mental health, focuses on parent-child interactions and lasts sufficiently long. This study aims to evaluate the effects of a stimulation programme administered by parents until 6 months post-term on motor and neurophysiological development of infants born preterm...
December 3, 2017: BMJ Open
https://www.readbyqxmd.com/read/29201532/clinical-presentation-epidemiology-neurophysiological-findings-treatment-and-outcome-of-nonconvulsive-status-epilepticus-a-3-year-prospective-hospital-based-study
#7
Boulenouar Mesraoua, Dirk Deleu, Hassan Al Hail, Faisal Ibrahim, Gayane Melikyan, Hassan Al Hussein, Rajvir Singh, Basim Uthman, Leopold Streletz, Peter W Kaplan, Heinz Gregor Wieser
Objective: This study reports the prevalence of Nonconvulsive Status Epilepticus (NCSE) in patients with altered mental status (AMS), and describes the clinical presentation, etiology, neurophysiological findings, neuroimaging, treatment, and outcome of NCSE in Qatar. Recording duration of continuous EEG monitoring was also discussed. Methods: This was a 3-year, prospective, hospital-based study involving patients with AMS and continuous EEG monitoring admitted to the Emergency and ICUs of Hamad Hospital, Qatar...
2017: Journal of Drug Assessment
https://www.readbyqxmd.com/read/29198040/mismatch-negativity-and-p3a-in-adolescents-and-young-adults-with-autism-spectrum-disorders-behavioral-correlates-and-clinical-implications
#8
Yi-Ling Chien, Ming Hsien Hsieh, Susan Shur-Fen Gau
In a sample of 37 adolescents and young adults with autism spectrum disorder (ASD) and 35 typically-developing controls (TDC), we investigated sensory symptoms by clinical measures, and Mismatch Negativity and P3a component at Fz with the frequency and duration oddball paradigms of event-related potentials. Results showed that compared to TDC, ASD participants reported more sensory symptoms, and presented a shorter P3a peak latency in the duration paradigm, which was correlated with more social awareness deficits...
December 2, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/29197341/frail-phenotype-is-associated-with-distinct-quantitative-electroencephalographic-findings-among-end-stage-renal-disease-patients-an-observational-study
#9
Chia-Ter Chao, Hsin-Jung Lai, Hung-Bin Tsai, Shao-Yo Yang, Jenq-Wen Huang
BACKGROUND: Frailty is prevalent among patients with end-stage renal disease (ESRD) and is associated with an increased risk of cognitive impairment. However, apart from its influence on cognition, it is currently unknown whether frailty affects subtler cerebral function in patients with ESRD. METHODS: Patients with ESRD were prospectively enrolled, with clinical features and laboratory data recorded. The severity of frailty among these patients with ESRD was ascertained using the previously validated simple FRAIL scale, and was categorized as none-to-mild and moderate-to-severe frailty...
December 2, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/29195921/social-cognition-and-self-other-distinctions-in-neuropsychiatry-insights-from-schizophrenia-and-tourette-syndrome
#10
REVIEW
Clare M Eddy
Impairments in social cognition may reflect dysfunction of disorder specific or disorder general mechanisms. Although cross-disorder comparison may prove insightful, few studies have compared social cognition in different neuropsychiatric disorders. Parallel investigation of schizophrenia and Tourette syndrome (TS) is encouraged by similarities including the presence of problematic social behavior, echophenomena, emotional dysregulation and dopamine dysfunction. Focusing on tests of social cognition administered in both disorders, this review aims to summarize behavioral, neurophysiological and neuroimaging findings, before exploring how these may contribute to clinical symptoms...
November 28, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29193325/reappraisal-of-cortical-myoclonus-a-retrospective-study-of-clinical-neurophysiology
#11
Anna Latorre, Lorenzo Rocchi, Alfredo Berardelli, John C Rothwell, Kailash P Bhatia, Carla Cordivari
No abstract text is available yet for this article.
November 29, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29191288/spinal-manipulative-therapy-and-sports-performance-enhancement-a-systematic-review
#12
REVIEW
Marcelo B Botelho, Bruno A P Alvarenga, Nícolly Molina, Marcos Ribas, Abrahão F Baptista
OBJECTIVE: The purpose of this study was to review the literature regarding the relationship between spinal manipulative therapy (SMT) and sports performance. METHODS: PubMed and Embase databases were searched for original studies published up to July 2016. Inclusion criteria were if SMT has been applied to athletes and if any sports performance-related outcome was measured. RESULTS: Of the 581 potential studies, 7 clinical trials were selected...
September 2017: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/29190328/the-computational-anatomy-of-visual-neglect
#13
Thomas Parr, Karl J Friston
Visual neglect is a debilitating neuropsychological phenomenon that has many clinical implications and-in cognitive neuroscience-offers an important lesion deficit model. In this article, we describe a computational model of visual neglect based upon active inference. Our objective is to establish a computational and neurophysiological process theory that can be used to disambiguate among the various causes of this important syndrome; namely, a computational neuropsychology of visual neglect. We introduce a Bayes optimal model based upon Markov decision processes that reproduces the visual searches induced by the line cancellation task (used to characterize visual neglect at the bedside)...
November 28, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29189923/congenital-myasthenic-syndrome-with-episodic-apnoea-clinical-neurophysiological-and-genetic-features-in-the-long-term-follow-up-of-19-patients
#14
Grace McMacken, Roger G Whittaker, Teresinha Evangelista, Angela Abicht, Marina Dusl, Hanns Lochmüller
BACKGROUND: Congenital myasthenic syndrome with episodic apnoea (CMS-EA) is a rare but potentially treatable cause of apparent life-threatening events in infancy. The underlying mechanisms for sudden and recurrent episodes of respiratory arrest in these patients are unclear. Whilst CMS-EA is most commonly caused by mutations in CHAT, the list of associated genotypes is expanding. METHODS: We reviewed clinical information from 19 patients with CMS-EA, including patients with mutations in CHAT, SLC5A7 and RAPSN, and patients lacking a genetic diagnosis...
November 30, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29186541/neuroendocrine-and-neurophysiological-effects-of-interleukin-6-in-rheumatoid-arthritis
#15
Ernest H S Choy, Leonard H Calabrese
RA is a chronic, systemic, autoimmune disease characterized by inflammation and degradation of the joints, causing significant negative impact on quality of life. In addition to joint disease, symptoms and co-morbidities associated with RA-namely pain, fatigue and mood disorders-are often as debilitating as the disease itself. The pro-inflammatory cytokine IL-6 plays a critical role in RA-associated pathology. However, a greater understanding of the translational effects of IL-6 outside of the immune system is needed...
November 22, 2017: Rheumatology
https://www.readbyqxmd.com/read/29185536/swallow-induced-syncope-in-5-patients-electrophysiologic-evaluation-during-swallowing
#16
Ibrahim Aydogdu, Can Hasdemir, Ahmet Acarer, Sezin Alpaydin, Cumhur Ertekin
Background: We sought to characterize a cohort of participants with swallow-induced syncope (SIS) with clinical and electrophysiologic evaluations. Methods: Using electrocardiographic monitoring and neurophysiologic methods of swallowing, we evaluated a cohort of 5 patients with SIS, 4 of whom had longitudinal follow-up. Results: We determined electrophysiologically that the duration between the onset of swallow and a bradyarrhythmia or asystole is extremely short (2-3 seconds) in SIS...
August 2017: Neurology. Clinical Practice
https://www.readbyqxmd.com/read/29176796/revisiting-primary-neural-leprosy-clinical-serological-molecular-and-neurophysiological-aspects
#17
Diogo Fernandes Dos Santos, Matheus Rocha Mendonça, Douglas Eulálio Antunes, Elaine Fávaro Pípi Sabino, Raquel Campos Pereira, Luiz Ricardo Goulart, Isabela Maria Bernardes Goulart
BACKGROUND: Leprosy neuropathy is considered the most common peripheral neuropathy of infectious etiology worldwide, representing a public health problem. Clinical diagnosis of primary neural leprosy (PNL) is challenging, since no skin lesions are found and the slit skin smear bacilloscopy is negative. However, there are still controversial concepts regarding the primary-neural versus pure-neural leprosy definition, which will be explored by using multiple clinical-laboratory analyses in this study...
November 27, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29174765/attention-training-modulates-resting-state-neurophysiological-abnormalities-in-posttraumatic-stress-disorder
#18
Amy Badura-Brack, Timothy J McDermott, Katherine M Becker, Tara J Ryan, Maya M Khanna, Daniel S Pine, Yair Bar-Haim, Elizabeth Heinrichs-Graham, Tony W Wilson
Recent research indicates the relative benefits of computerized attention control treatment (ACT) and attention bias modification treatment (ABMT) for posttraumatic stress disorder (PTSD); however, neural changes underlying these therapeutic effects remain unknown. This study examines how these two types of attention training modulate neurological dysfunction in veterans with PTSD. A community sample of 46 combat veterans with PTSD participated in a randomized double-blinded clinical trial of ACT versus ABMT and 32 of those veterans also agreed to undergo resting-state magnetoencephalography (MEG) recordings...
November 14, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29173870/a-reappraisal-of-small-and-large-fiber-damage-in-carpal-tunnel-syndrome-new-insights-into-the-value-of-the-emla-test-for-improving-diagnostic-sensitivity
#19
Leila Triki, Hela G Zouari, Rim Kammoun, Firas Kammoun, Ines Kammoun, Kaouthar Masmoudi, Jean-Pascal Lefaucheur
OBJECTIVES: To reappraise the respective involvement of small- and large-fiber damage in carpal tunnel syndrome (CTS) and to determine the diagnostic sensitivity of autonomic tests compared to conventional nerve conduction study (NCS). METHODS: Thirty-two manual workers complaining of at least unilateral CTS were enrolled. They underwent clinical interview and completed the symptom severity scale of the Boston CTS Questionnaire (sssBCTQ) and the Neuropathic Pain Symptom Inventory (NPSI)...
November 23, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29172186/-neural-basis-for-producing-temporal-order
#20
Shigeru Kitazawa
It has been proposed that a position in time can be discriminated in two ways. First, each position is either past, present, or future (A series). Second, each position is either before or after another (B series). In this review, we aim to infer how the two series are represented in the brain on the basis of findings from clinical, neurophysiological, and neuroimaging studies. We suggest that the precuneus and posterior cingulate cortex are critically involved in the A series. In the B series, we suggest that a group of events are represented in space around the intraparietal cortex and are combined with the temporal directional cue provided by the motion signals in the left temporo-parietal junction...
November 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
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