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Affective neurophysiology

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https://www.readbyqxmd.com/read/29335879/current-approaches-and-new-developments-in-the-pharmacological-management-of-tourette-syndrome
#1
REVIEW
Julio Quezada, Keith A Coffman
Tourette syndrome (TS) is a neurodevelopmental disorder of unknown etiology characterized by spontaneous, involuntary movements and vocalizations called tics. Once thought to be rare, TS affects 0.3-1% of the population. Tics can cause physical discomfort, emotional distress, social difficulties, and can interfere with education and desired activities. The pharmacologic treatment of TS is particularly challenging, as currently the genetics, neurophysiology, and neuropathology of this disorder are still largely unknown...
January 15, 2018: CNS Drugs
https://www.readbyqxmd.com/read/29330628/clinical-and-cn-sfemg-evaluation-of-neostigmine-test-in-myasthenia-gravis
#2
Giorgia Sciacca, Ester Reggio, Giovanni Mostile, Alessandra Nicoletti, Filippo Drago, Salvatore Salomone, Mario Zappia
Neostigmine test (NT) is a pharmacological test, demonstrating a clinical improvement in patients affected by myasthenia gravis (MG). We aim to compare clinical evaluation and neurophysiological recordings by concentric-needle single-fiber electromyography (CN-SFEMG) in response to acute administration of neostigmine in ocular and generalized MG patients. Twenty-three MG patients (10 with ocular MG and 13 with generalized MG) were evaluated before and after 90 min neostigmine 0.5-mg administration. Clinical responsiveness was assessed by MG composite (MGC) scale...
January 12, 2018: Neurological Sciences
https://www.readbyqxmd.com/read/29323122/effect-of-rhythmic-auditory-cueing-on-parkinsonian-gait-a-systematic-review-and-meta-analysis
#3
Shashank Ghai, Ishan Ghai, Gerd Schmitz, Alfred O Effenberg
The use of rhythmic auditory cueing to enhance gait performance in parkinsonian patients' is an emerging area of interest. Different theories and underlying neurophysiological mechanisms have been suggested for ascertaining the enhancement in motor performance. However, a consensus as to its effects based on characteristics of effective stimuli, and training dosage is still not reached. A systematic review and meta-analysis was carried out to analyze the effects of different auditory feedbacks on gait and postural performance in patients affected by Parkinson's disease...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29318978/cognitive-rehabilitation-of-cerebellar-deficits
#4
Peter Marien, Kim van Dun, Frank Van Overwalle
During the past 3 decades numerous neurophysiological, neuroimaging, experimental and clinical studies have evidenced a crucial role for the cerebellum in cognitive, affective and behavioral functions. As a result of the acknowledged modulatory role of the cerebellum upon remote structures such as the cerebral cortex, cerebellar injury may give rise to a constellation of behavioral, affective and cognitive symptoms (Schmahmann's Syndrome). In sharp contrast to the wide range of therapeutical interventions to treat cognitive and affective disorders following cerebral cortical lesions and despite the consequences of Schmahmann's syndrome upon daily life activities, the literature is surprisingly only scantly documented with studies investigating the impact of cognitive therapies on cerebellar induced cognitive and affective disorders...
January 10, 2018: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/29286524/psychophysiological-characteristics-in-the-chnpp-accident-clean-up-workers-exclusion-zone-evacuees-and-anti-terrorist-operation-servicemen
#5
K M Loganovsky, M V Gresko
OBJECTIVE: Evaluation of interdependencies between psychometric parameters and spontaneous cerebral electric activity in the ChNPP accident clean up workers, evacuees from exclusion zone, and anti terrorist operation service men. OBJECT AND METHODS: Psychometric and neurophysiological parameters were reviewed in the study subjects retro spectively and in comparison. Study population included the ChNPP accident clean up workers (ACUW), evacuees from the 30 kilometer exclusion zone, specifically in a sample from a cohort of the NRCRM Clinical Epidemiological Register (n=316), and anti terrorist operation servicemen (n=81) undergoing rehabilitation in the NRCRM Radiation psychoneurology department...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29283439/homozygous-boricua-tbck-mutation-causes-neurodegeneration-and-aberrant-autophagy
#6
Xilma R Ortiz-González, Jesus A Tintos-Hernández, Kierstin Keller, Xueli Li, A Reghan Foley, Diana X Bharucha-Goebel, Sudha K Kessler, Sabrina W Yum, Peter B Crino, Miao He, Douglas C Wallace, Carsten G Bönnemann
OBJECTIVE: Autosomal recessive mutations in TBCK cause intellectual disability of variable severity. Although the physiologic function of TBCK remains unclear, loss-of-function mutations are associated with inhibition of mTORC1 signaling. As mTORC1 signaling is known to regulate autophagy, we hypothesized that TBCK-encephalopathy patients with a neurodegenerative course have defects in autophagic-lysosomal dysfunction. METHODS: Children (n=8) of Puerto Rican (Boricua) descent affected with homozygous TBCK p...
December 28, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/29260349/neural-mechanisms-of-attentional-switching-between-pain-and-a-visual-illusion-task-a-laser-evoked-potential-study
#7
Andrej Stancak, Nicholas Fallon, Alessandra Fenu, Katerina Kokmotou, Vicente Soto, Stephanie Cook
Previous studies demonstrated that pain induced by a noxious stimulus during a distraction task is affected by both stimulus-driven and goal-directed processes which interact and change over time. The purpose of this exploratory study was to analyse associations of aspects of subjective pain experience and engagement with the distracting task with attention-sensitive components of noxious laser-evoked potentials (LEPs) on a single-trial basis. A laser heat stimulus was applied to the dorsum of the left hand while subjects either viewed the Rubin vase-face illusion (RVI), or focused on their pain and associated somatosensory sensations occurring on their stimulated hand...
December 19, 2017: Brain Topography
https://www.readbyqxmd.com/read/29259562/early-adverse-caregiving-experiences-and-preschoolers-current-attachment-affect-brain-responses-during-facial-familiarity-processing-an-erp-study
#8
Melanie T Kungl, Ina Bovenschen, Gottfried Spangler
When being placed into more benign environments like foster care, children from adverse rearing backgrounds are capable of forming attachment relationships to new caregivers within the first year of placement, while certain problematic social behaviors appear to be more persistent. Assuming that early averse experiences shape neural circuits underlying social behavior, neurophysiological studies on individual differences in early social-information processing have great informative value. More precisely, ERP studies have repeatedly shown face processing to be sensitive to experience especially regarding the caregiving background...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29249931/preliminary-evidence-of-other-race-effect-like-behavior-induced-by-cathodal-tdcs-over-the-right-occipital-cortex-in-the-absence-of-overall-effects-on-face-object-processing
#9
Andrea I Costantino, Matilde Titoni, Francesco Bossi, Isabella Premoli, Michael A Nitsche, Davide Rivolta
Neuromodulation techniques such as tDCS have provided important insight into the neurophysiological mechanisms that mediate cognition. Albeit anodal tDCS (a-tDCS) often enhances cognitive skills, the role of cathodal tDCS (c-tDCS) in visual cognition is largely unexplored and inconclusive. Here, in a single-blind, sham-controlled study, we investigated the offline effects of 1.5 mA c-tDCS over the right occipital cortex of 86 participants on four tasks assessing perception and memory of both faces and objects...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29249371/unilateral-repetitive-transcranial-magnetic-stimulation-differentially-affects-younger-and-older-adults-completing-a-verbal-working-memory-task
#10
Jessica Shields, Jeffrey Mock, Deidre Devier, Anne Foundas
Functional neuroimaging studies have found that lateralization of activity in the dorsolateral prefrontal cortex (dlPFC) is reduced with aging. In the present study, repetitive transcranial magnetic stimulation (rTMS) was used to disrupt dlPFC activity in order to test the relationship of dlPFC laterality and age in verbal working memory (WM). Young (n=36) and older (n=35) subjects received 1Hz-rTMS (sham or active) to left or right dlPFC and WM performance was assessed pre- and post-stimulation via the n-back task...
January 15, 2018: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29246865/chronic-adolescent-morphine-exposure-alters-the-responses-of-lateral-paragigantocellular-neurons-to-acute-morphine-administration-in-adulthood
#11
Hamed Salmanzadeh, Hossein Azizi, S Mohammad Ahmadi Soleimani, Narges Pachenari, Saeed Semnanian
Accumulating evidence support the growing non-medical use of morphine during adolescence. Despite this concern which has recently been addressed in some studies, cellular mechanisms underlying the long-term neurobiological and behavioral effects of opiate exposure during this critical period have still remained largely unexplored. Several reports have proposed that subtle long-lasting neurobiological alterations might be triggered by exposure to opiate derivatives or drugs of abuse particularly when this occurs during a critical phase of brain maturation such as adolescence...
December 12, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/29242823/processing-of-natural-echolocation-sequences-in-the-inferior-colliculus-of-seba-s-fruit-eating-bat-carollia-perspicillata
#12
M Jerome Beetz, Sebastian Kordes, Francisco García-Rosales, Manfred Kössl, Julio C Hechavarría
For the purpose of orientation, echolocating bats emit highly repetitive and spatially directed sonar calls. Echoes arising from call reflections are used to create an acoustic image of the environment. The inferior colliculus (IC) represents an important auditory stage for initial processing of echolocation signals. The present study addresses the following questions: (1) how does the temporal context of an echolocation sequence mimicking an approach flight of an animal affect neuronal processing of distance information to echo delays? (2) how does the IC process complex echolocation sequences containing echo information from multiple objects (multiobject sequence)? Here, we conducted neurophysiological recordings from the IC of ketamine-anaesthetized bats of the species Carollia perspicillata and compared the results from the IC with the ones from the auditory cortex (AC)...
November 2017: ENeuro
https://www.readbyqxmd.com/read/29241172/neurophysiological-monitoring-and-awake-craniotomy-for-resection-of-intracranial-gliomas
#13
Taiichi Saito, Manabu Tamura, Mikhail F Chernov, Soko Ikuta, Yoshihiro Muragaki, Takashi Maruyama
Aggressive resection of intracranial gliomas has a positive impact on patients' prognosis, but is associated with a risk of neurological complications. For preservation of brain functions and avoidance of major postoperative morbidity various methods of intraoperative neurophysiological monitoring have been introduced into clinical practice. At present, somatosensory evoked potentials (SSEP), motor evoked potentials (MEP), visual evoked potentials (VEP), brainstem auditory evoked potentials (BAEP), and electrocorticography (ECoG) are used routinely during neurosurgical procedures...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29230561/neurophysiological-variability-masks-differences-in-functional-neuroanatomical-networks-and-their-effectiveness-to-modulate-response-inhibition-between-children-and-adults
#14
Benjamin Bodmer, Moritz Mückschel, Veit Roessner, Christian Beste
Executive functions are well-known to undergo developmental changes from childhood to adulthood. Considerable efforts have been made to elucidate the affected system neurophysiological mechanisms. But while it is well-known that developmental changes affect intra-individual variability, this potential bias has largely been neglected when investigating the neurophysiology underlying developmental differences between children and adults. We hypothesize that due to differences in intra-individual variability of neural processes between children and adults, reliable group differences will only be evident after accounting for intra-individual variability in neurophysiological processes...
December 11, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/29230055/impaired-path-integration-in-mice-with-disrupted-grid-cell-firing
#15
Mariana Gil, Mihai Ancau, Magdalene I Schlesiger, Angela Neitz, Kevin Allen, Rodrigo J De Marco, Hannah Monyer
Path integration (PI) is a highly conserved, self-motion-based navigation strategy. Since the discovery of grid cells in the medial entorhinal cortex, neurophysiological data and computational models have suggested that these neurons serve PI. However, more direct empirical evidence supporting this hypothesis has been missing due to a lack of selective manipulations of grid cell activity and suitable behavioral assessments. Here we report that selective disruption of grid cell activity in mice can be achieved by removing NMDA glutamate receptors from the retro-hippocampal region and that disrupted grid cell firing accounts for impaired PI performance...
January 2018: Nature Neuroscience
https://www.readbyqxmd.com/read/29217407/can-we-predict-intermediate-syndrome-a-review
#16
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 5, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/29214617/gehs-neurophysiological-classification-system-for-patients-with-neuropathy-of-the-ulnar-nerve-at-the-elbow
#17
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/29212917/rhythmic-arm-cycling-training-improves-walking-and-neurophysiological-integrity-in-chronic-stroke-the-arms-can-give-legs-a-helping-hand-in-rehabilitation
#18
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/29212406/eeg-measurement-of-emotion-processing-in-children-with-daytime-urinary-incontinence
#19
Justine Niemczyk, Monika Equit, Katja Rieck, Mathias Rubly, Catharina Wagner, Alexander von Gontard
OBJECTIVE: Daytime urinary incontinence (DUI) is common in childhood. The aim of the study was to neurophysiologically analyse the central emotion processing in children with DUI. METHOD: In 20 children with DUI (mean age 8.1 years, 55 % male) and 20 controls (mean age 9.1 years, 75 % male) visual event-related potentials (ERPs) were recorded after presenting emotionally valent (80 neutral, 40 positive, and 40 negative) pictures from the International Affective Picture System (IAPS) as an oddball-paradigm...
December 7, 2017: Zeitschrift Für Kinder- und Jugendpsychiatrie und Psychotherapie
https://www.readbyqxmd.com/read/29206597/quantitative-proteomic-analysis-of-the-hippocampus-of-rats-with-gcr-induced-spatial-memory-impairment
#20
Sucharita M Dutta, Melissa M Hadley, Scott Peterman, Jessica S Jewell, Vania D Duncan, Richard A Britten
NASA is planning future missions to Mars, which will result in astronauts being exposed to ∼13 cGy/year of galactic cosmic radiation (GCR). Previous ground-based experiments have demonstrated that low (15 cGy) doses of 1 GeV/n 56Fe ions impair hippocampus-dependent spatial memory in rats. However, some irradiated rats maintain a spatial memory performance comparable to that seen in the sham-irradiated rats, suggesting that some of these animals are able to ameliorate the deleterious effects of the GCR, while others are not...
December 5, 2017: Radiation Research
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