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Journal of Neural Transmission

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https://www.readbyqxmd.com/read/28735370/gait-and-cognitive-impairments-in-multiple-sclerosis-the-specific-contribution-of-falls-and-fear-of-falling
#1
Alon Kalron, Gilles Allali
Our goal was to identify the specific contribution of fear of falling (FoF) and falls with quantitative gait impairments and cognition capabilities in multiple sclerosis (MS) patients. Patients were separated into four individual subgroups as to the presence of FoF and falls (i.e., fearless/non-fallers, fearless/fallers, FoF/non-fallers and FoF/fallers). The Falls Efficacy Scale International questionnaire was used to assess the level of concern of falling. Participants were defined as "fallers" and "non-fallers" based on their fall history...
July 22, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28733711/a-brief-history-of-neurological-botulinum-toxin-therapy-in-germany
#2
REVIEW
Dirk Dressler, Peter Roggenkaemper
Botulinum toxin (BT) has long been infamous in food safety and biological warfare. In the early 1970s, Alan B Scott of San Francisco invented its therapeutic use originally in extraocular eye muscles to treat strabismus using a therapeutic BT type A preparation provided by Edward J Schantz and Eric A Johnson. Subsequently a large number of medical indications based on motor and glandular hyperactivity and-most recently-chronic migraine are now treated by BT therapy. BT's highly specific and elaborate mechanism of action represents a completely novel therapeutic principle which will have consequences far beyond existing indications...
July 21, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28730316/locus-coeruleus-neuronal-activity-correlates-with-behavioral-response-to-acute-and-chronic-doses-of-methylphenidate-ritalin-in-adolescent-rats
#3
Natasha Kharas, Cruz Reyes-Vazquez, Nachum Dafny
The objective of this study is to gain insight into the behavioral and neuronal changes induced by acute and chronic methylphenidate (MPD) administration. Specifically, there is limited knowledge of the effects of MPD on the locus coeruleus (LC), the main site of norepinephrine synthesis in the brain. In this study, LC neuronal firing rate was recorded simultaneously with locomotor activity in freely moving adolescent rats. Adolescent rats were chosen to mimic the age group in humans most affected by MPD exposure...
July 20, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28726034/mentally-stimulating-activities-associate-with-better-cognitive-performance-in-parkinson-disease
#4
Jeffrey L B Bohnen, Martijn L T M Müller, Jacob Haugen, Nicolaas I Bohnen
Subjects at risk of dementia benefit from participation in mentally stimulating activities, but no prior studies have investigated similar associations in Parkinson disease (PD). The aim of this study was to investigate the relationship between times spent engaging in mentally stimulating activities and cognitive functions in PD while accounting for the degree of primary neurodegenerations. PD patients (N = 41, 33 males; age 68.5 ± 7.2; Hoehn and Yahr stage 2.6 ± 0.6) completed the Community Health Activities Model Program for Seniors questionnaire, mini-mental state examination (MMSE), and [(11)C]dihydrotetrabenazine dopaminergic and [(11)C]piperidinyl propionate acetylcholinesterase PET imaging...
July 19, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28721577/characterization-of-motor-events-in-rem-sleep-behavior-disorder
#5
Paulo Bugalho, Tânia Lampreia, Rita Miguel, Marcelo Mendonça, André Caetano, Raquel Barbosa
We used video-polysomnography to characterize motor events (ME) in 14 Parkinson's disease (PD-RBD) and 18 idiopathic (iRBD) REM sleep behavior disorder cases. ME occurred predominantly in the upper limbs and were mostly simple, non-emotional, distal and focal. There were no significant differences in ME features between PD-RBD and iRBD groups. Our data suggests that RBD ME are mostly non violent. Similarity between PD-RBD and iRBD groups suggests that motor dysfunction does not affect ME features.
July 18, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28710524/altered-n100-potential-associates-with-working-memory-impairment-in-parkinson-s-disease
#6
Tua Annanmaki, Kirsi Palmu, Kari Murros, Juhani Partanen
The diagnosis of cognitive impairment and dementia often occurring with Parkinson's disease (PD) is still based on the clinical picture and neuropsychological examination. Ancillary methods to detect cognitive decline in these patients are, therefore, needed. Alterations in the latencies and amplitudes of evoked response potential (ERP) components N100 and P200 have been described in PD. Due to limited number of studies their relation to cognitive deficits in PD remains obscure. The present study was designed to examine if alterations in the N100- and P200-potentials associate with neuropsychological impairment in PD...
July 14, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28707160/systems-for-deep-brain-stimulation-review-of-technical-features
#7
REVIEW
A Amon, F Alesch
The use of deep brain stimulation (DBS) is an important treatment option for movement disorders and other medical conditions. Today, three major manufacturers provide implantable systems for DBS. Although the underlying principle is basically the same for all available systems, the differences in the technical features vary considerably. This article outlines aspects regarding the technical features of DBS systems. The differences between voltage and current sources are addressed and their effect on stimulation is shown...
July 13, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28702850/nonmotor-fluctuations-phenotypes-pathophysiology-management-and-open-issues
#8
REVIEW
Joseph Classen, Jiri Koschel, Christian Oehlwein, Klaus Seppi, Peter Urban, Christian Winkler, Ullrich Wüllner, Alexander Storch
Parkinson's disease (PD) is a neurodegenerative multisystem disorder characterized by progressive motor symptoms such as bradykinesia, tremor and muscle rigidity. Over the course of the disease, numerous non-motor symptoms, sometimes preceding the onset of motor symptoms, significantly impair patients' quality of life. The significance of non-motor symptoms may outweigh the burden through progressive motor incapacity, especially in later stages of the disease. The advanced stage of the disease is characterized by motor complications such as fluctuations and dyskinesias induced by the long-term application of levodopa therapy...
July 12, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28695335/glutamatergic-system-and-mtor-signaling-pathway-participate-in-the-antidepressant-like-effect-of-inosine-in-the-tail-suspension-test
#9
Filipe Marques Gonçalves, Vivian Binder Neis, Débora Kurrle Rieger, Tanara V Peres, Mark William Lopes, Isabella A Heinrich, Ana Paula Costa, Ana Lúcia S Rodrigues, Manuella P Kaster, Rodrigo Bainy Leal
Glutamatergic system and mTOR signaling pathway have been proposed to be important targets for pharmacological treatment of major depressive disorder. Previous studies have shown that inosine, an endogenous purine, is able to exert a remarkable antidepressant-like effect in mice. Nevertheless, the role of glutamatergic system and mTOR in this effect was not previously determined. This study was designed to investigate the possible modulation of NMDA receptors (NMDAR), AMPA receptors (AMPAR) and mTOR complex 1 (mTORC1) signaling pathway in the inosine anti-immobility effect in the tail suspension test (TST) in mice...
July 10, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28689295/inhibitory-rtms-applied-on-somatosensory-cortex-in-wilson-s-disease-patients-with-hand-dystonia
#10
Pierre Lozeron, Aurélia Poujois, Elodie Meppiel, Sana Masmoudi, Thierry Peron Magnan, Eric Vicaut, Emmanuel Houdart, Jean-Pierre Guichard, Jean-Marc Trocello, France Woimant, Nathalie Kubis
Hand dystonia is a common complication of Wilson's disease (WD), responsible for handwriting difficulties and disability. Alteration of sensorimotor integration and overactivity of the somatosensory cortex have been demonstrated in dystonia. This study investigated the immediate after effect of an inhibitory repetitive transcranial magnetic stimulation (rTMS) applied over the somatosensory cortex on the writing function in WD patients with hand dystonia. We performed a pilot prospective randomized double-blind sham-controlled crossover rTMS study...
July 8, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28689294/cerebellar-disease-associated-with-anti-glutamic-acid-decarboxylase-antibodies-review
#11
REVIEW
José Fidel Baizabal-Carvallo, Marlene Alonso-Juarez
Several neurological syndromes have been recognized associated to GAD antibodies. Among those disorders, cerebellar ataxia (CA) is one of the most common, along with stiff-person syndrome. Patients with GAD associated CA present with a progressive pancerebellar syndrome, with a subacute or chronic evolution, along with other neurological manifestations such as stiffness, oculomotor dysfunction, epilepsy, and cognitive dysfunction. These symptoms may be preceded by the so-called "brainstem attacks", where manifestations consistent with transient dysfunction of the brainstem may be observed...
July 8, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28687908/the-effect-of-bilateral-transcranial-direct-current-stimulation-on-early-auditory-processing-in-schizophrenia-a-preliminary-study
#12
Walter Dunn, Yuri Rassovsky, Jonathan Wynn, Allan D Wu, Marco Iacoboni, Gerhard Hellemann, Michael F Green
Transcranial direct current stimulation (tDCS) was applied bilaterally over the auditory cortex in 12 schizophrenia patients to modulate early auditory processing. Performance on a tone discrimination task (tone-matching task-TMT) and auditory mismatch negativity were assessed after counterbalanced anodal, cathodal, and sham tDCS. Cathodal stimulation improved TMT performance (p < 0.03) compared to sham condition. Post-hoc analyses revealed a stimulation condition by negative symptom interaction in which greater negative symptoms were associated with a better TMT performance after anodal tDCS...
July 7, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28687907/functional-activation-of-g%C3%AE-q-coupled-to-5-ht2a-receptor-and-m1-muscarinic-acetylcholine-receptor-in-postmortem-human-cortical-membranes
#13
Yuji Odagaki, Masakazu Kinoshita, Toshio Ota, J Javier Meana, Luis F Callado, Jesús A García-Sevilla
Heterotrimeric guanine nucleotide-binding proteins (G-proteins) play a pivotal role in a wide range of signal transduction pathways, and receptor/G-protein coupling has been implicated in the pathophysiology of mental disorders. In this study, guanosine-5'-O-(3-[(35)S]thio)triphosphate ([(35)S]GTPγS) binding/immunoprecipitation assay for Gαq was applied to postmortem human brains. After its optimization for human prefrontal cortical membranes, we selected 5-hydroxytryptamine (5-HT) and carbachol as efficient agonists for subsequent experiments...
July 7, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28676934/type-i-interferon-pathway-in-neuroinflammation-and-neurodegeneration-focus-on-alzheimer-s-disease
#14
REVIEW
Juliet M Taylor, Zachery Moore, Myles R Minter, Peter J Crack
Past research in Alzheimer's disease (AD) has largely been driven by the amyloid hypothesis; the accompanying neuroinflammation seen in AD has been assumed to be consequential and not disease modifying or causative. However, recent data from both clinical and preclinical studies have established that the immune-driven neuroinflammation contributes to AD pathology. Key evidence for the involvement of neuroinflammation in AD includes enhanced microglial and astroglial activation in the brains of AD patients, increased pro-inflammatory cytokine burden in AD brains, and epidemiological evidence that chronic non-steroidal anti-inflammatory drug use prior to disease onset leads to a lower incidence of AD...
July 4, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28656371/cerebrospinal-fluid-monoamine-metabolite-profiles-in-bipolar-disorder-adhd-and-controls
#15
Erik Pålsson, Carl Sellgren, Eleonore Rydén, Ruth Kizza, Aurimantas Pelanis, Henrik Zetterberg, Kaj Blennow, Mikael Landén
Alterations in monoaminergic signaling are suggested as key aspects of the pathophysiology in bipolar disorder and ADHD, but it is not known if the monoamine metabolic profile differs between these disorders. One method to study monoaminergic systems in humans is to measure monoamine end-point metabolite concentrations in cerebrospinal fluid (CSF). Here, we analyzed CSF monoamine metabolite concentrations in 103 adults with bipolar disorder, 72 adults with ADHD, and 113 controls. Individuals with bipolar disorder had significantly higher homovanillic acid (HVA, 264 ± 112 nmol/L, p < 0...
June 27, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28653081/erratum-to-reward-functions-of-the-basal-ganglia
#16
Wolfram Schultz
No abstract text is available yet for this article.
June 26, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28647831/alterations-in-regional-homogeneity-of-resting-state-brain-activity-in-fatigue-of-parkinson-s-disease
#17
Junyi Li, Yongsheng Yuan, Min Wang, Jiejin Zhang, Li Zhang, Siming Jiang, Jian Ding, Kezhong Zhang
Fatigue is a common complaint in patients with Parkinson's disease (PD). However, the neural bases of fatigue in PD remain uncertain. In this cross-sectional study, our aim was to study the change of the local brain function in PD patients with fatigue. Among 49 patients with PD, 17 of them had fatigue and the remaining 32 patients without fatigue, and 25 age- and gender-matched healthy controls were enrolled. All subjects were evaluated with Fatigue Severity Scale (FSS) and had a resting-state functional magnetic resonance imaging (rs-fMRI) scan...
June 24, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28643101/cognitive-performance-correlates-with-the-degree-of-dopaminergic-degeneration-in-the-associative-part-of-the-striatum-in-non-demented-parkinson-s-patients
#18
Dorothee Kübler, Henning Schroll, Ralph Buchert, Andrea A Kühn
Parkinson's disease (PD) patients show cognitive deficits that are relevant in terms of prognosis and quality of life. Degeneration of striatal dopaminergic afferents proceeds from dorsal/caudal to anterior/ventral and is discussed to account for some of these symptoms. Treatment with dopamine (DA) has differential effects on cognitive dysfunctions, improving some and worsening others. We hypothesized that cognitive performance during the dopaminergic OFF state correlates with DAT availability in the associative striatum...
June 22, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28620835/twenty-years-since-the-discovery-of-the-parkin-gene
#19
REVIEW
Nobutaka Hattori, Yoshikuni Mizuno
Nearly 20 years have passed since we identified the causative gene for a familial Parkinson's disease, parkin (now known as PARK2), in 1998. PARK2 is the most common gene responsible for young-onset Parkinson's disease. It codes for the protein Parkin RBR E3 ubiquitin-protein ligase (PARK2), which directly links to the ubiquitin-proteasome as a ubiquitin ligase. PARK2 is involved in mitophagy, which is a type of autophagy, in collaboration with PTEN-induced putative kinase 1 (PINK1). The PINK1 gene (previously known as PARK6) is also a causative gene for young-onset Parkinson's disease...
June 15, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28620834/dysregulation-of-striatal-projection-neurons-in-parkinson-s-disease
#20
REVIEW
Goichi Beck, Arun Singh, Stella M Papa
The loss of nigrostriatal dopamine (DA) is the primary cause of motor dysfunction in Parkinson's disease (PD), but the underlying striatal mechanisms remain unclear. In spite of abundant literature portraying structural, biochemical and plasticity changes of striatal projection neurons (SPNs), in the past there has been a data vacuum from the natural human disease and its close model in non-human primates. Recently, single-cell recordings in advanced parkinsonian primates have generated new insights into the altered function of SPNs...
June 15, 2017: Journal of Neural Transmission
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