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Parkinson disease cognition

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https://www.readbyqxmd.com/read/28230630/update-on-the-22q11-2-deletion-syndrome-and-its-relevance-to-schizophrenia
#1
Lily Van, Erik Boot, Anne S Bassett
PURPOSE OF REVIEW: Schizophrenia occurs in ∼25% of individuals with 22q11.2 deletion syndrome (22q11.2DS), the strongest known molecular genetic risk factor for schizophrenia. This review highlights recent literature in 22q11.2DS as it pertains to psychosis and schizophrenia. RECENT FINDINGS: Advances in noninvasive prenatal testing allow for early detection of 22q11.2DS in utero, whereas premature birth has been shown to be a significant risk factor for development of psychotic illness in 22q11...
February 21, 2017: Current Opinion in Psychiatry
https://www.readbyqxmd.com/read/28229442/-rapidly-progressive-dementia-and-parkinsonism-associated-to-multiple-dural-arteriovenous-fistulas
#2
P Mejia, L M Piedra, X Merchan-Del Hierro
INTRODUCTION: Rapidly progressive dementias are an infrequent group of diseases characterised by cognitive deterioration and other neurological disorders that develop over a period ranging from weeks to months. Their causation is varied and includes a large number of neurodegenerative, toxic, metabolic, autoimmune, infectious and vascular conditions. CASE REPORT: We report the case of a 69-year-old male who was admitted to hospital due to a rapidly progressive dementia and parkinsonism caused by multiple dural arteriovenous fistulas, which were successfully treated by means of endovascular therapy...
March 1, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28228718/current-concepts-on-the-physiopathological-relevance-of-dopaminergic-receptors
#3
REVIEW
Ada Ledonne, Nicola B Mercuri
Dopamine (DA) is a key neurotransmitter modulating essential functions of the central nervous system (CNS), like voluntary movement, reward, several cognitive functions and goal-oriented behaviors. The factual relevance of DAergic transmission can be well appreciated by considering that its dysfunction is recognized as a core alteration in several devastating neurological and psychiatric disorders, including Parkinson's disease (PD) and associated movement disorders, as well as, schizophrenia, bipolar disorder, attention deficit hyperactivity disorder (ADHD) and addiction...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28228714/narrative-organization-deficit-in-lewy-body-disorders-is-related-to-alzheimer-pathology
#4
Murray Grossman, David J Irwin, Charles Jester, Amy Halpin, Sharon Ash, Katya Rascovsky, Daniel Weintraub, Corey T McMillan
Background: Day-to-day interactions depend on conversational narrative, and we examine here the neurobiological basis for difficulty organizing narrative discourse in patients with Lewy body disorders (LBD). Method: Narrative organization was examined in 56 non-aphasic LBD patients, including a non-demented cohort (n = 30) with Parkinson's disease (PD) or PD-Mild Cognitive Impairment PD-MCI,) and a cohort with mild dementia (n = 26) including PD-dementia (PDD) and dementia with Lewy bodies (DLB), with similar age and education but differing in MMSE (p < 0...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28228566/reduced-cognitive-function-in-patients-with-parkinson-disease-and-obstructive-sleep-apnea
#5
Victoria P Mery, Priti Gros, Anne-Louise Lafontaine, Ann Robinson, Andrea Benedetti, R John Kimoff, Marta Kaminska
OBJECTIVE: To assess the association between obstructive sleep apnea (OSA) and nonmotor symptoms (NMS), including cognitive dysfunction, in patients with Parkinson disease (PD). METHODS: Patients with idiopathic PD, recruited from a movement disorder clinic, underwent overnight polysomnography. OSA was defined as an apnea-hypopnea index (AHI) ≥15/h. PD severity was assessed using the Hoehn & Yahr (H&Y) scale and the Movement Disorder Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS)...
February 22, 2017: Neurology
https://www.readbyqxmd.com/read/28227862/effects-of-high-frequency-rtms-on-sleep-deprivation-a-pilot-study
#6
D P Martinez-Cancino, J Azpiroz-Leehan, L Jimenez-Angeles, A Garcia-Quintanar, R Santana-Miranda, D P Martinez-Cancino, J Azpiroz-Leehan, L Jimenez-Angeles, A Garcia-Quintanar, R Santana-Miranda, A Garcia-Quintanar, L Jimenez-Angeles, R Santana-Miranda, J Azpiroz-Leehan, D P Martinez-Cancino
Transcranial magnetic stimulation is a neurostimulation technique which has the potential to serve as a unique research tool for investigating a wide variety of fields in cognitive neuroscience. TMS has been approved by the FDA to serve as a treatment to depression and has also been used to evaluate its effects among several conditions such as Alzheimer, Parkinson disease, chronic pain and stroke. High frequency TMS has been previously used with the intention to measure and modulate the negative effects of sleep deprivation in cognitive performance, but there is no consensus about the ideal protocol yet...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226814/detection-of-gait-initiation-failure-in-parkinson-s-disease-patients-using-eeg-signals
#7
Quynh Tran Ly, A M Ardi Handojoseno, Moran Gilat, Nghia Nguyen, Rifai Chai, Yvonne Tran, Simon J G Lewis, Hung T Nguyen, Quynh Tran Ly, A M Ardi Handojoseno, Moran Gilat, Nghia Nguyen, Rifai Chai, Yvonne Tran, Simon J G Lewis, Hung T Nguyen, Nghia Nguyen, A M Ardi Handojoseno, Moran Gilat, Hung T Nguyen, Yvonne Tran, Simon J G Lewis, Quynh Tran Ly, Rifai Chai
Gait Initiation Failure (GIF) is one of the most disabling gait disturbances seen in advanced Parkinson's disease (PD). Gait Initiation is a complex motor task that requires motor and cognitive processing to enable the correct selection, timing and scaling of movement. Failure to initiate the first step often precipitates falls and leads to significant morbidity. However, the brain mechanisms underlying GIF remain unknown. This study utilized an ambulatory electroencephalography (EEG) technique to investigate the brain dynamic changes underlying GIF and aims to detect the occurrence of GIF in four PD patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226697/differences-in-white-matter-microstructure-between-parkinson-s-disease-patients-with-and-without-rem-sleep-behavior-disorder
#8
Farzaneh Rahmani, Mina Ansari, Atefeh Pooyan, Mehdi M Mirbagheri, Mohammad Hadi Aarabi, Farzaneh Rahmani, Mina Ansari, Atefeh Pooyan, Mehdi M Mirbagheri, Mohammad Hadi Aarabi, Mehdi M Mirbagheri, Farzaneh Rahmani, Atefeh Pooyan, Mina Ansari, Mohammad Hadi Aarabi
REM sleep behavior disorder (RBD) is characterized by increased muscle tone and violent limb movements and usually occurs during the early stages of Parkinson disease (PD). PD patients with RBD represent faster motor progression and cognitive dysfunction. We used diffusion imaging to assess which regions are involved in this phenomenon. In the current study, we computed Quantitative Anisotropic (QA), which is based on spin distribution function (SDF) that quantifies the density of diffusing water and is more sensitive to psychological differences between groups and also diffusion MRI connectometry to conduct group analysis between age and gender matched PD patients with and without RBD...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226288/neural-correlates-of-lexical-decisions-in-parkinson-s-disease-revealed-with-multivariate-extraction-of-cortico-subthalamic-interactions
#9
F U Hohlefeld, A Ewald, F Ehlen, H O Tiedt, A Horn, A A Kühn, G Curio, F Klostermann, V V Nikulin
OBJECTIVE: Neural interactions between cortex and basal ganglia are pivotal for sensorimotor processing. Specifically, coherency between cortex and subthalamic structures is a frequently studied phenomenon in patients with Parkinson's disease. However, it is unknown whether cortico-subthalamic coherency might also relate to cognitive aspects of task performance, e.g., language processing. Furthermore, standard coherency studies are challenged by how to efficiently handle multi-channel recordings...
January 17, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28224328/the-parkinson-s-disease-cognitive-rating-scale-pd-crs-normative-values-from-268-healthy-italian-individuals
#10
Gabriella Santangelo, Giovanna Lagravinese, Valeria Battini, Carlo Chiorri, Mattia Siciliano, Giovanni Abbruzzese, Carmine Vitale, Paolo Barone
The Parkinson's Disease-Cognitive Rating Scale (PD-CRS) is a cognitive screening battery that includes subtests to assess cortical and subcortical functions. It is a valid screening tool for mild cognitive impairment (MCI) in Parkinson's disease (PD) and is recommended for diagnosing PD-MCI-Level I. Until now, no study has provided population-based norms for the Italian population. The aim of the present study was to collect normative values in a sample of Italian healthy subjects. Two hundred and sixty-eight (125 men) participants of different ages (age range 30-79 years) and educational levels (from primary school to university) underwent the PD-CRS...
February 21, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28223512/glucosylceramide-synthase-inhibition-alleviates-aberrations-in-synucleinopathy-models
#11
S Pablo Sardi, Catherine Viel, Jennifer Clarke, Christopher M Treleaven, Amy M Richards, Hyejung Park, Maureen A Olszewski, James C Dodge, John Marshall, Elina Makino, Bing Wang, Richard L Sidman, Seng H Cheng, Lamya S Shihabuddin
Mutations in the glucocerebrosidase gene (GBA) confer a heightened risk of developing Parkinson's disease (PD) and other synucleinopathies, resulting in a lower age of onset and exacerbating disease progression. However, the precise mechanisms by which mutations in GBA increase PD risk and accelerate its progression remain unclear. Here, we investigated the merits of glucosylceramide synthase (GCS) inhibition as a potential treatment for synucleinopathies. Two murine models of synucleinopathy (a Gaucher-related synucleinopathy model, Gba(D409V/D409V) and a A53T-α-synuclein overexpressing model harboring wild-type alleles of GBA, A53T-SNCA mouse model) were exposed to a brain-penetrant GCS inhibitor, GZ667161...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28222537/timing-and-kinetics-of-nonmotor-fluctuations-in-advanced-parkinson-s-disease
#12
Christiana Ossig, Daniel Sippel, Mareike Fauser, Florin Gandor, Wolfgang H Jost, Georg Ebersbach, Alexander Storch
BACKGROUND: Nonmotor symptoms (NMS) are known to fluctuate together with motor oscillations in advanced PD, but their timing and kinetics remains enigmatic. OBJECTIVE: To evaluate timing and kinetics of NMS fluctuations. METHODS: Analysis of diary data from 17 fluctuating PD patients. Diaries were completed by rating NMS as absent (defined herein as NMS On state) or present (NMS Off state) and motor function for every hour for 5 consecutive days...
February 8, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28221082/partial-lesion-of-the-nigrostriatal-dopamine-pathway-in-rats-impairs-egocentric-learning-but-not-spatial-learning-or-behavioral-flexibility
#13
Katharine M Seip-Cammack, James J Young, Megan E Young, Matthew L Shapiro
Degeneration of the nigrostriatal dopaminergic system in Parkinson's disease (PD) causes motor dysfunction and cognitive impairment, but the etiology of the cognitive deficits remains unclear. The present study investigated the behavioral effects of partial lesions of the nigrostriatal dopamine (DA) pathway. Rats received bilateral infusions of either 6-hydroxydopamine (6-OHDA) or vehicle into the dorsolateral striatum and were tested in spatial and procedural learning tasks. Compared with intact rats, DA-depleted rats were impaired when the first task they learned required egocentric responses...
February 20, 2017: Behavioral Neuroscience
https://www.readbyqxmd.com/read/28220571/genetic-risk-factors-for-cognitive-decline-in-parkinson-s-disease-a-review-of-the-literature
#14
REVIEW
E S Fagan, L Pihlstrøm
Parkinson's disease is a highly heterogeneous disorder, where genetic factors are likely to contribute to clinical variability, including susceptibility to cognitive impairment and dementia. Monogenic forms of parkinsonism show distinct cognitive profiles, yet less is known about the impact of common genetic variants on cognition in sporadic Parkinson's disease. In a systematic review of the literature, the current results from genetic association studies of cognitive outcomes are summarized and prospects and challenges for future studies are discussed...
February 21, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28219749/behavioral-phenotypes-associated-with-mptp-induction-of-partial-lesions-in-common-marmosets-callithrix-jacchus
#15
Kimberley A Phillips, Corinna N Ross, Jennifer Spross, Catherine J Cheng, Alyssa Izquierdo, K C Biju, Cang Chen, Senlin Li, Suzette D Tardif
Parkinson's disease is a chronic neurodegenerative disorder with the core motor features of resting tremor, bradykinesia, rigidity, and postural instability. Non-motor symptoms also occur, and include cognitive dysfunction, mood disorders, anosmia (loss of smell), and REM sleep disturbances. As the development of medications and other therapies for treatment of non-motor symptoms is ongoing, it is essential to have animal models that aid in understanding the neural changes underlying non-motor PD symptoms and serve as a testing ground for potential therapeutics...
February 17, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28215728/domain-specific-accuracy-of-the-montreal-cognitive-assessment-subsections-in-parkinson-s-disease
#16
Taylor R Hendershott, Delphine Zhu, Seoni Llanes, Kathleen L Poston
OBJECTIVE: The Montreal Cognitive Assessment (MoCA) is among the most widely adopted screening tools for cognitive impairment because it includes tests in multiple domains and is available in 55 languages. The MoCA is often the only formal cognitive assessment available when comprehensive neuropsychological testing is not practical, such as rural clinical settings or large retrospective and multi-lingual research settings. However, the MoCA domain-specific subsections have never been formally assessed for sensitivity or specificity...
February 7, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28215162/gut-brain-axis-role-of-lipids-in-the-regulation-of-inflammation-pain-and-cns-diseases
#17
Roberto Russo, Claudia Cristiano, Carmen Avagliano, Carmen De Caro, Giovanna La Rana, Giuseppina Mattace Raso, Roberto Berni Canani, Rosaria Meli, Antonio Calignano
The human gut is a composite anaerobic environment with a large, diverse and dynamic enteric microbiota, represented by more than 100 trillion microorganisms, including at least 1000 distinct species. The discovery that a different microbial composition can influence behavior and cognition, and in turn the nervous system can indirectly influence enteric microbiota composition, has significantly contributed to establish the well-accepted concept of gut-brain axis. This hypothesis is supported by several evidence showing mutual mechanisms, which involve the vague nerve, the immune system, the hypothalamic-pituitary-adrenal (HPA) axis modulation and the bacteria-derived metabolites...
February 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28215142/small-molecule-modulation-of-hdac6-activity-the-propitious-therapeutic-strategy-to-vanquish-neurodegenerative-disorders
#18
Shabir Ahmad Ganai
Histone deacetylases (HDACs) are epigenetic enzymes creating the transcriptionally inactive state of chromatin by erasing acetyl moiety from histone and non-histone substrates. HDAC6 modulates several biological pathways in dividing cells as well as in post-mitotic neurons, and has been implicated in the pathophysiology of neurodegeneration. The distinct cellular functions and survival in these cells are reliant on HDAC6-mediated processes including intracellular trafficking, chaperone-mediated stress responses, anti-oxidation and protein degradation...
8, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28213762/association-between-cognitive-impairment-and-urinary-dysfunction-in-parkinson-s-disease
#19
Zuzanna Tkaczynska, Andrea Pilotto, Sara Becker, Susanne Gräber-Sultan, Daniela Berg, Inga Liepelt-Scarfone
Urinary dysfunction (UD) is a common non-motor feature of Parkinson's disease (PD), and might be secondary to neurodegeneration involving cortical and subcortical brain areas. The possible link between UD and cognitive deficits has never been examined in frontal cortex impairment, and is still not completely understood in PD. In the present study, 94 PD patients underwent a comprehensive motor, cognitive and non-motor assessment. It was shown that 55.3% of patients reported UD, of which 17% needed specific urological treatment...
February 17, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28212928/nonmotor-symptoms-in-de-novo-parkinson-disease-comparing-to-normal-aging
#20
Petra Bago Rožanković, Marjan Rožanković, Lovorka Vučak Novosel, Maristela Stojić
OBJECTIVE: Nonmotor symptoms (NMSs) are common in Parkinson disease (PD), affecting patient's quality of life. The prevalence and domains of NMSs in untreated de novo PD remains unclear, especially comparing to normal aging. The objective was to determine NMSs in untreated de novo PD patients. PATIENTS AND METHODS: We performed a cross-sectional study to evaluate the frequency and severity of NMSs in untreated de novo PD patients (n=71) and age-matched normal controls (n=60) using the Non-Motor Symptoms Scale (NMSS)...
February 11, 2017: Clinical Neurology and Neurosurgery
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