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Nieto-Escamez F, Obrero-Gaitán E, Cortés-Pérez I. Visual Dysfunction in Parkinson's Disease. Brain Sci 2023; 13:1173. [PMID: 37626529 PMCID: PMC10452537 DOI: 10.3390/brainsci13081173] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/11/2023] [Accepted: 08/03/2023] [Indexed: 08/27/2023] Open
Abstract
Non-motor symptoms in Parkinson's disease (PD) include ocular, visuoperceptive, and visuospatial impairments, which can occur as a result of the underlying neurodegenerative process. Ocular impairments can affect various aspects of vision and eye movement. Thus, patients can show dry eyes, blepharospasm, reduced blink rate, saccadic eye movement abnormalities, smooth pursuit deficits, and impaired voluntary and reflexive eye movements. Furthermore, visuoperceptive impairments affect the ability to perceive and recognize visual stimuli accurately, including impaired contrast sensitivity and reduced visual acuity, color discrimination, and object recognition. Visuospatial impairments are also remarkable, including difficulties perceiving and interpreting spatial relationships between objects and difficulties judging distances or navigating through the environment. Moreover, PD patients can present visuospatial attention problems, with difficulties attending to visual stimuli in a spatially organized manner. Moreover, PD patients also show perceptual disturbances affecting their ability to interpret and determine meaning from visual stimuli. And, for instance, visual hallucinations are common in PD patients. Nevertheless, the neurobiological bases of visual-related disorders in PD are complex and not fully understood. This review intends to provide a comprehensive description of visual disturbances in PD, from sensory to perceptual alterations, addressing their neuroanatomical, functional, and neurochemical correlates. Structural changes, particularly in posterior cortical regions, are described, as well as functional alterations, both in cortical and subcortical regions, which are shown in relation to specific neuropsychological results. Similarly, although the involvement of different neurotransmitter systems is controversial, data about neurochemical alterations related to visual impairments are presented, especially dopaminergic, cholinergic, and serotoninergic systems.
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Affiliation(s)
- Francisco Nieto-Escamez
- Department of Psychology, University of Almeria, 04120 Almeria, Spain
- Center for Neuropsychological Assessment and Rehabilitation (CERNEP), 04120 Almeria, Spain
| | - Esteban Obrero-Gaitán
- Department of Health Sciences, University of Jaen, Paraje Las Lagunillas s/n, 23071 Jaen, Spain;
| | - Irene Cortés-Pérez
- Department of Health Sciences, University of Jaen, Paraje Las Lagunillas s/n, 23071 Jaen, Spain;
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2
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Hanna-Pladdy B, Pahwa R, Lyons KE. Dopaminergic Basis of Spatial Deficits in Early Parkinson's Disease. Cereb Cortex Commun 2021; 2:tgab042. [PMID: 34738086 DOI: 10.1093/texcom/tgab042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 06/06/2021] [Accepted: 06/07/2021] [Indexed: 11/14/2022] Open
Abstract
Dopaminergic mechanisms regulating cognitive and motor control were evaluated comparing visuoperceptual and perceptuomotor functions in Parkinson's disease (PD). The performance of PD patients (n = 40) was contrasted with healthy controls (n = 42) across two separate visits (on and off dopaminergic medications) on computerized tasks of perception and aiming to a target at variable stimulus lengths (4, 8, 12 cm). Novel visuoperceptual tasks of length equivalence and width interval estimations without motor demands were compared with tasks estimating spatial deviation in movement termination. The findings support the presence of spatial deficits in early PD, more pronounced with increased discrimination difficulty, and with shorter stimulus lengths of 4 cm for both visuoperceptual and perceptumotor functions. Dopaminergic medication had an adverse impact on visuoperceptual accuracy in particular for length equivalence estimations, in contrast with dopaminergic modulation of perceptuomotor functions that reduced angular displacements toward the target. The differential outcomes for spatial accuracy in perception versus movement termination in PD are consistent with involvement of the direct pathway and models of progressive loss of dopamine through corticostriatal loops. Future research should develop validated and sensitive standardized tests of perception and explore dopaminergic selective deficits in PD to optimize medication titration for motor and cognitive symptoms of the disease.
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Affiliation(s)
- B Hanna-Pladdy
- Center for Advanced Imaging Research (CAIR), Department of Diagnostic Radiology & Nuclear Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - R Pahwa
- Parkinson's Disease and Movement Disorder Center, Department of Neurology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - K E Lyons
- Parkinson's Disease and Movement Disorder Center, Department of Neurology, University of Kansas Medical Center, Kansas City, KS 66160, USA
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3
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Bellot E, Garnier-Crussard A, Pongan E, Delphin-Combe F, Coste MH, Gentil C, Rouch I, Hénaff MA, Schmitz C, Tillmann B, Krolak-Salmon P. Blunted emotion judgments of body movements in Parkinson's disease. Sci Rep 2021; 11:18575. [PMID: 34535699 PMCID: PMC8448734 DOI: 10.1038/s41598-021-97788-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 08/05/2021] [Indexed: 11/22/2022] Open
Abstract
Some of the behavioral disorders observed in Parkinson’s disease (PD) may be related to an altered processing of social messages, including emotional expressions. Emotions conveyed by whole body movements may be difficult to generate and be detected by PD patients. The aim of the present study was to compare valence judgments of emotional whole body expressions in individuals with PD and in healthy controls matched for age, gender and education. Twenty-eight participants (13 PD patients and 15 healthy matched control participants) were asked to rate the emotional valence of short movies depicting emotional interactions between two human characters presented with the “Point Light Displays” technique. To ensure understanding of the perceived scene, participants were asked to briefly describe each of the evaluated movies. Patients’ emotional valence evaluations were less intense than those of controls for both positive (p < 0.001) and negative (p < 0.001) emotional expressions, even though patients were able to correctly describe the depicted scene. Our results extend the previously observed impaired processing of emotional facial expressions to impaired processing of emotions expressed by body language. This study may support the hypothesis that PD affects the embodied simulation of emotional expression and the potentially involved mirror neuron system.
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Affiliation(s)
- Emmanuelle Bellot
- UMR 5292, Lyon Neuroscience Research Center (CRNL), CNRS, INSERM, U1028, Université Claude Bernard Lyon 1, Université of Lyon, Lyon, France.,University of Lyon, Lyon, France
| | - Antoine Garnier-Crussard
- University of Lyon, Lyon, France.,Clinical and Research Memory Center of Lyon, Lyon Institute for Elderly, Charpennes Hospital, Hospices Civils de Lyon, 27 rue Gabriel Péri, 69100, Villeurbanne, France
| | - Elodie Pongan
- Clinical and Research Memory Center of Lyon, Lyon Institute for Elderly, Charpennes Hospital, Hospices Civils de Lyon, 27 rue Gabriel Péri, 69100, Villeurbanne, France.,Neurology Unit, Clinical and Research Memory Center, University Hospital of Saint-Etienne, 42055, Saint-Étienne, France
| | - Floriane Delphin-Combe
- University of Lyon, Lyon, France.,Clinical and Research Memory Center of Lyon, Lyon Institute for Elderly, Charpennes Hospital, Hospices Civils de Lyon, 27 rue Gabriel Péri, 69100, Villeurbanne, France
| | - Marie-Hélène Coste
- University of Lyon, Lyon, France.,Clinical and Research Memory Center of Lyon, Lyon Institute for Elderly, Charpennes Hospital, Hospices Civils de Lyon, 27 rue Gabriel Péri, 69100, Villeurbanne, France
| | - Claire Gentil
- University of Lyon, Lyon, France.,Clinical and Research Memory Center of Lyon, Lyon Institute for Elderly, Charpennes Hospital, Hospices Civils de Lyon, 27 rue Gabriel Péri, 69100, Villeurbanne, France
| | - Isabelle Rouch
- Clinical and Research Memory Center of Lyon, Lyon Institute for Elderly, Charpennes Hospital, Hospices Civils de Lyon, 27 rue Gabriel Péri, 69100, Villeurbanne, France.,Neurology Unit, Clinical and Research Memory Center, University Hospital of Saint-Etienne, 42055, Saint-Étienne, France.,Bordeaux Population Health Center, INSERM, U1219, University of Bordeaux, Bordeaux, France
| | - Marie-Anne Hénaff
- UMR 5292, Lyon Neuroscience Research Center (CRNL), CNRS, INSERM, U1028, Université Claude Bernard Lyon 1, Université of Lyon, Lyon, France.,University of Lyon, Lyon, France
| | - Christina Schmitz
- UMR 5292, Lyon Neuroscience Research Center (CRNL), CNRS, INSERM, U1028, Université Claude Bernard Lyon 1, Université of Lyon, Lyon, France.,University of Lyon, Lyon, France
| | - Barbara Tillmann
- UMR 5292, Lyon Neuroscience Research Center (CRNL), CNRS, INSERM, U1028, Université Claude Bernard Lyon 1, Université of Lyon, Lyon, France.,University of Lyon, Lyon, France
| | - Pierre Krolak-Salmon
- UMR 5292, Lyon Neuroscience Research Center (CRNL), CNRS, INSERM, U1028, Université Claude Bernard Lyon 1, Université of Lyon, Lyon, France. .,University of Lyon, Lyon, France. .,Clinical and Research Memory Center of Lyon, Lyon Institute for Elderly, Charpennes Hospital, Hospices Civils de Lyon, 27 rue Gabriel Péri, 69100, Villeurbanne, France.
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4
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Ishioka T, Hirayama K, Hosokai Y, Takeda A, Suzuki K, Nishio Y, Sawada Y, Abe N, Mori E. Impaired perception of illusory contours and cortical hypometabolism in patients with Parkinson's disease. NEUROIMAGE-CLINICAL 2021; 32:102779. [PMID: 34418792 PMCID: PMC8385116 DOI: 10.1016/j.nicl.2021.102779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 11/21/2022]
Abstract
We assessed the perception of illusory contours in patients with PD. PD patients showed difficulty in perceiving Kanizsa illusory figures. Impaired perception of Kanizsa illusory figures was related to LOC hypometabolism.
Neuroimaging evidence suggests that areas of the higher-order visual cortex, including the lateral occipital complex (LOC), are engaged in the perception of illusory contours; however, these findings remain unsubstantiated by human lesion data. Therefore, we assessed the presentation time necessary to perceive two types of illusory contours formed by Kanizsa figures or aligned line ends in patients with Parkinson's disease (PD). Additionally, we used 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) to measure regional cerebral glucose metabolism in PD patients. Although there were no significant differences in the stimulus durations required for perception of illusory contours formed by aligned line ends between PD patients and controls, PD patients required significantly longer stimulus durations for the perception of Kanizsa illusory figures. Difficulty in perceiving Kanizsa illusory figures was correlated with hypometabolism in the higher-order visual cortical areas, including the posterior inferior temporal gyrus. These findings indicate an association between dysfunction in the posterior inferior temporal gyrus, a region corresponding to a portion of the LOC, and impaired perception of Kanizsa illusory figures in PD patients.
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Affiliation(s)
- Toshiyuki Ishioka
- Department of Occupational Therapy, School of Health and Social Services, Saitama Prefectural University, Japan; Department of Behavioral Neurology and Cognitive Neuroscience, Graduate School of Medicine, Tohoku University, Japan.
| | - Kazumi Hirayama
- Department of Behavioral Neurology and Cognitive Neuroscience, Graduate School of Medicine, Tohoku University, Japan; Department of Occupational Therapy, Yamagata Prefectural University of Health Science, Japan
| | - Yoshiyuki Hosokai
- Department of Behavioral Neurology and Cognitive Neuroscience, Graduate School of Medicine, Tohoku University, Japan; Department of Radiological Sciences, International University of Health and Welfare, Japan
| | - Atsushi Takeda
- Department of Neurology, Sendai Nishitaga Hospital, Japan
| | - Kyoko Suzuki
- Department of Behavioral Neurology and Cognitive Neuroscience, Graduate School of Medicine, Tohoku University, Japan
| | - Yoshiyuki Nishio
- Department of Behavioral Neurology and Cognitive Neuroscience, Graduate School of Medicine, Tohoku University, Japan; Department of Psychiatry, Tokyo Metropolitan Matsuzawa Hospital, Japan
| | - Yoichi Sawada
- Department of Behavioral Neurology and Cognitive Neuroscience, Graduate School of Medicine, Tohoku University, Japan; Department of Health and Welfare Science, Okayama Prefectural University, Japan
| | - Nobuhito Abe
- Department of Behavioral Neurology and Cognitive Neuroscience, Graduate School of Medicine, Tohoku University, Japan; Kokoro Research Center, Kyoto University, Japan
| | - Etsuro Mori
- Department of Behavioral Neurology and Cognitive Neuroscience, Graduate School of Medicine, Tohoku University, Japan; Department of Behavioral Neurology and Neuropsychiatry, United Graduate School of Child Development, Osaka University, Japan
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Güntekin B, Aktürk T, Yıldırım E, Yılmaz NH, Hanoğlu L, Yener G. Abnormalities in auditory and visual cognitive processes are differentiated with theta responses in patients with Parkinson's disease with and without dementia. Int J Psychophysiol 2020; 153:65-79. [PMID: 32339563 DOI: 10.1016/j.ijpsycho.2020.04.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 04/08/2020] [Accepted: 04/14/2020] [Indexed: 11/25/2022]
Abstract
The research on the abnormalities of event-related oscillations in Parkinson's disease (PD) was mostly studied with cognitively normal patients. The present study aims to show the adverse effects of cognitive decline in PD patients via the EEG-Brain Oscillations approach by comparing the electrophysiological responses in two modalities, i.e. auditory, and visual in which PD group show deficit. We conducted a study in which we analyzed event-related theta power and phase-locking during auditory and visual oddball paradigm. Cognitively normal PD (PDCN) patients (N = 15), PD with mild cognitive impairment (PDMCI) patients (N = 22), PD dementia (PDD) patients (N = 11) and healthy controls (HC) (N = 17) were included in the study. Neuropsychological assessments were applied to all participants. There was a gradual decrease in scores of neuropsychological tests (HC, PDCN, PDMCI, PDD, respectively). Most of the neuropsychological test scores of the participants were highly correlated with the theta power and theta phase locking values, especially over frontal-central areas. HC had higher theta phase-locking and power in comparison to PDMCI and PDD. The differentiation between HC and PDCN was specific to frontal-central areas. Theta power and theta phase-locking were decreased overall locations in PDMCI and PDD both during visual and auditory oddball paradigms compared with PDCN. The results indicate that theta responses in PD patients decreased gradually as the cognitive decline increased. We can conclude that complex abnormalities in their neurotransmitter and neuronal signal systems that occur with the progression of the disease could be responsible for these results.
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Affiliation(s)
- Bahar Güntekin
- Istanbul Medipol University, School of Medicine, Department of Biophysics, Istanbul, Turkey; REMER, Clinical Electrophysiology, Neuroimaging and Neuromodulation Lab., Istanbul Medipol University, Istanbul, Turkey.
| | - Tuba Aktürk
- Istanbul Medipol University, Vocational School, Program of Electroneurophysiology, Istanbul, Turkey; Istanbul Medipol University, Graduate School of Health Sciences, Department of Neuroscience, Istanbul, Turkey
| | - Ebru Yıldırım
- Istanbul Medipol University, Vocational School, Program of Electroneurophysiology, Istanbul, Turkey; Istanbul Medipol University, Graduate School of Health Sciences, Department of Neuroscience, Istanbul, Turkey
| | - Nesrin Helvacı Yılmaz
- Istanbul Medipol University, School of Medicine, Department of Neurology, Istanbul, Turkey
| | - Lütfü Hanoğlu
- REMER, Clinical Electrophysiology, Neuroimaging and Neuromodulation Lab., Istanbul Medipol University, Istanbul, Turkey; Istanbul Medipol University, School of Medicine, Department of Neurology, Istanbul, Turkey
| | - Görsev Yener
- Dokuz Eylül University Medical School, Department of Neurology, Izmir, Turkey; Dokuz Eylül University, Brain Dynamics Multidisciplinary Research Center, Izmir, Turkey
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6
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Camacho-Conde JA, Campos-Arillo VM. The phenomenology of pain in Parkinson's disease. Korean J Pain 2020; 33:90-96. [PMID: 31888323 PMCID: PMC6944372 DOI: 10.3344/kjp.2020.33.1.90] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 11/28/2019] [Accepted: 12/02/2019] [Indexed: 01/02/2023] Open
Abstract
Background Parkinson's disease (PD) is a neurodegenerative disorder that is the second most common disorder after Alzheimer's disease. PD includes both "motor" and "non-motor" symptoms, one of which is pain. The aim of this study was to investigate the clinical characteristics of pain in patients with PD. Methods This cross-sectional study included 250 patients diagnosed with PD, 70% of which had mild to moderate PD (stages 2/3 of Hoehn and Yahr scale). The average age was 67.4 years, and the average duration since PD diagnosis was 7.1 years. Relevant data collected from PD patients were obtained from their personal medical history. Results The prevalence of pain was found to be high (82%), with most patients (79.2%) relating their pain to PD. Disease duration was correlated with the frequency of intense pain (R: 0.393; P < 0.05). PD pain is most frequently perceived as an electrical current (64%), and two pain varieties were most prevalent (2.60 ± 0.63). Our findings confirm links between pain, its evolution over time, its multi-modal character, the wide variety of symptoms of PD, and the female sex. Conclusions Our results demonstrated that the pain felt by PD patients is mainly felt as an electrical current, which contrasts with other studies where the pain is described as burning and itching. Our classification is innovative because it is based on anatomy, whereas those of other authors were based on syndromes.
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7
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Sharma S, Raj K, Singh S. Neuroprotective Effect of Quercetin in Combination with Piperine Against Rotenone- and Iron Supplement-Induced Parkinson's Disease in Experimental Rats. Neurotox Res 2019; 37:198-209. [PMID: 31654381 DOI: 10.1007/s12640-019-00120-z] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 09/20/2019] [Accepted: 09/25/2019] [Indexed: 12/13/2022]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder caused by selective dopaminergic neuronal loss. Rotenone is a neurotoxin that selectively destroys dopaminergic neurons, leading to PD-like symptoms. Quercetin possesses antioxidant, anti-inflammatory, and neuroprotective properties but a major drawback is its low bioavailability. Therefore, the present study was designed to evaluate the neuroprotective effect of quercetin in combination with piperine against rotenone- and iron supplement-induced model of PD. Rotenone was administered at a dose of 1.5 mg/kg through an intraperitoneal route with iron supplement at a dose of 120 μg/g in diet from day 1 to day 28. Pre-treatment with quercetin (25 and 50 mg/kg, p.o.), piperine (2.5 mg/kg, p.o.) alone, quercetin (25 mg/kg, p.o.) in combination with piperine (2.5 mg/kg), and ropinirole (0.5 mg/kg, i.p.) was administered for 28 days 1 h prior to rotenone and iron supplement administration. All behavioral parameters were assessed on weekly basis. On the 29th day, all animals were sacrificed and striatum was isolated for biochemical (LPO, nitrite, GSH, mitochondrial complexes I and IV), neuroinflammatory (TNF-α, IL-1β, and IL-6), and neurotransmitter (dopamine, norepinephrine, serotonin, GABA, glutamate) estimation. Quercetin treatment attenuated rotenone- and iron supplement-induced motor deficits and biochemical and neurotransmitter alterations in experimental rats. However, combination of quercetin (25 mg/kg) with piperine (2.5 mg/kg) significantly enhanced its neuroprotective effect as compared with treatment with quercetin alone. The study concluded that combination of quercetin with piperine contributed to superior antioxidant, anti-inflammatory, and neuroprotective effect against rotenone- and iron supplement-induced PD in experimental rats.
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Affiliation(s)
- Shakshi Sharma
- Neuroscience Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Khadga Raj
- Neuroscience Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Shamsher Singh
- Neuroscience Division, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, 142001, India.
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8
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Modeling Parkinson’s disease and treatment complications in rodents: Potentials and pitfalls of the current options. Behav Brain Res 2018; 352:142-150. [DOI: 10.1016/j.bbr.2017.12.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 12/07/2017] [Accepted: 12/09/2017] [Indexed: 01/05/2023]
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9
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Langston RG, Virmani T. Use of a Modified STROOP Test to Assess Color Discrimination Deficit in Parkinson's Disease. Front Neurol 2018; 9:765. [PMID: 30258399 PMCID: PMC6143680 DOI: 10.3389/fneur.2018.00765] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 08/23/2018] [Indexed: 11/13/2022] Open
Abstract
Objective: To objectively measure color vision dysfunction in idiopathic Parkinson's disease (iPD) using an easily administered, essentially free, modified Stroop test. Methods: Sixty-one iPD patients and 26 age-matched controls (HC) were enrolled after IRB approval and performed congruent (CST) and incongruent (IST) modified Stroop tests consisting of 40 words in 10 colors arranged in a 5 x 8 grid. The scorer was blinded to participant diagnosis. Errors on IST were defined as type 1 (written word reported rather than color) or type 2 (color reported different from the written word or its color). Results: The iPD group and the control group completed testing with similar CST performance. On the IST, 75.4% of iPD patients had type 2 errors (p = 0.001, OR 4.907, 95%CI 1.838-13.097) compared to 38.5% HC, with a positive predictive value of 82%. The mean number of type 2 errors was also higher in the iPD group, even with MoCA scores as a covariate in the analysis. Type 1 errors were not significantly different between the groups. A univariate logistic regression model with age, gender, MoCA, normalized IST completion time and the presence/absence of type 2 errors also resulted in type 2 errors as the only significant factor in the equation (p = 0.026). Conclusions: The modified Stroop test incorporated into the clinical evaluation of a patient may provide a quick and inexpensive objective measure of a non-motor feature of iPD, which could help in the clinical diagnosis of iPD in conjunction with the motor assessments currently used by neurologists.
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Affiliation(s)
- Rebekah G Langston
- College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Tuhin Virmani
- Department of Neurology, University of Arkansas for Medical Sciences, Little Rock, AR, United States
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10
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Wu CC, Cao B, Dali V, Gagliardi C, Barthelemy OJ, Salazar RD, Pomplun M, Cronin-Golomb A, Yazdanbakhsh A. Eye movement control during visual pursuit in Parkinson's disease. PeerJ 2018; 6:e5442. [PMID: 30155357 PMCID: PMC6109371 DOI: 10.7717/peerj.5442] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/24/2018] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Prior studies of oculomotor function in Parkinson's disease (PD) have either focused on saccades without considering smooth pursuit, or tested smooth pursuit while excluding saccades. The present study investigated the control of saccadic eye movements during pursuit tasksand assessed the quality of binocular coordinationas potential sensitive markers of PD. METHODS Observers fixated on a central cross while a target moved toward it. Once the target reached the fixation cross, observers began to pursue the moving target. To further investigate binocular coordination, the moving target was presented on both eyes (binocular condition), or on one eye only (dichoptic condition). RESULTS The PD group made more saccades than age-matched normal control adults (NC) both during fixation and pursuit. The difference between left and right gaze positions increased over time during the pursuit period for PD but not for NC. The findings were not related to age, as NC and young-adult control group (YC) performed similarly on most of the eye movement measures, and were not correlated with classical measures of PD severity (e.g., Unified Parkinson's Disease Rating Scale (UPDRS) score). DISCUSSION Our results suggest that PD may be associated with impairment not only in saccade inhibition, but also in binocular coordination during pursuit, and these aspects of dysfunction may be useful in PD diagnosis or tracking of disease course.
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Affiliation(s)
- Chia-Chien Wu
- Center for Computational Neuroscience and Neural Technology, Boston University, Boston, MA, USA
| | - Bo Cao
- Department of Psychiatry, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Veena Dali
- Center for Computational Neuroscience and Neural Technology, Boston University, Boston, MA, USA
| | - Celia Gagliardi
- Center for Computational Neuroscience and Neural Technology, Boston University, Boston, MA, USA
| | | | - Robert D. Salazar
- Department of Psychological and Brain Sciences, Boston University, Boston, MA, USA
| | - Marc Pomplun
- Department of Computer Science, University of Massachusetts at Boston, Boston, MA, USA
| | - Alice Cronin-Golomb
- Department of Psychological and Brain Sciences, Boston University, Boston, MA, USA
| | - Arash Yazdanbakhsh
- Center for Computational Neuroscience and Neural Technology, Boston University, Boston, MA, USA
- Department of Psychological and Brain Sciences, Boston University, Boston, MA, USA
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11
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Güntekin B, Hanoğlu L, Güner D, Yılmaz NH, Çadırcı F, Mantar N, Aktürk T, Emek-Savaş DD, Özer FF, Yener G, Başar E. Cognitive Impairment in Parkinson's Disease Is Reflected with Gradual Decrease of EEG Delta Responses during Auditory Discrimination. Front Psychol 2018. [PMID: 29515489 PMCID: PMC5826339 DOI: 10.3389/fpsyg.2018.00170] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Parkinson’s disease (PD) is a neurodegenerative disease that is characterized by loss of dopaminergic neurons in the substantia nigra. Mild Cognitive impairment (MCI) and dementia may come along with the disease. New indicators are necessary for detecting patients that are likely to develop dementia. Electroencephalogram (EEG) Delta responses are one of the essential electrophysiological indicators that could show the cognitive decline. Many research in literature showed an increase of delta responses with the increased cognitive load. Furthermore, delta responses were decreased in MCI and Alzheimer disease in comparison to healthy controls during cognitive paradigms. There was no previous study that analyzed the delta responses in PD patients with cognitive deficits. The present study aims to fulfill this important gap. 32 patients with Parkinson’s disease (12 of them were without any cognitive deficits, 10 of them were PD with MCI, and 10 of them were PD with dementia) and 16 healthy subjects were included in the study. Auditory simple stimuli and Auditory Oddball Paradigms were applied. The maximum amplitudes of each subject’s delta response (0.5–3.5 Hz) in 0–600 ms were measured for each electrode and for each stimulation. There was a significant stimulation × group effect [F(df = 6,88) = 3,21; p < 0.015; ηp2 = 0.180], which showed that the difference between groups was specific to the stimulation. Patients with Parkinson’s disease (including PD without cognitive deficit, PD with MCI, and PD with dementia) had reduced delta responses than healthy controls upon presentation of target stimulation (p < 0.05, for all comparisons). On the other hand, this was not the case for non-target and simple auditory stimulation. Furthermore, delta responses gradually decrease according to the cognitive impairment in patients with PD. Conclusion: The results of the present study showed that cognitive decline in PD could be represented with decreased event related delta responses during cognitive stimulations. Furthermore, the present study once more strengthens the hypothesis that decrease of delta oscillatory responses could be the candidate of a general electrophysiological indicator for cognitive impairment.
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Affiliation(s)
- Bahar Güntekin
- Department of Biophysics, School of International Medicine, Istanbul Medipol University, Istanbul, Turkey.,REMER, Clinical Electrophysiology, Neuroimaging and Neuromodulation Lab, Istanbul Medipol University, Istanbul, Turkey
| | - Lütfü Hanoğlu
- REMER, Clinical Electrophysiology, Neuroimaging and Neuromodulation Lab, Istanbul Medipol University, Istanbul, Turkey.,Department of Neurology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Dilan Güner
- Department of Neuroscience, Aziz Sancar Institute of Experimental Medicine Research, Istanbul University, Istanbul, Turkey
| | - Nesrin H Yılmaz
- Department of Neurology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Fadime Çadırcı
- REMER, Clinical Electrophysiology, Neuroimaging and Neuromodulation Lab, Istanbul Medipol University, Istanbul, Turkey.,Department of Neuroscience, Institute of Medical Science, Istanbul Medipol University, Istanbul, Turkey
| | - Nagihan Mantar
- REMER, Clinical Electrophysiology, Neuroimaging and Neuromodulation Lab, Istanbul Medipol University, Istanbul, Turkey.,Department of Neuroscience, Institute of Medical Science, Istanbul Medipol University, Istanbul, Turkey
| | - Tuba Aktürk
- REMER, Clinical Electrophysiology, Neuroimaging and Neuromodulation Lab, Istanbul Medipol University, Istanbul, Turkey.,Department of Neuroscience, Institute of Medical Science, Istanbul Medipol University, Istanbul, Turkey
| | - Derya D Emek-Savaş
- Department of Psychology, Faculty of Letters, Dokuz Eylül University, Izmir, Turkey
| | - Fahriye F Özer
- Department of Neurology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.,Department of Neurology, Koç University Hospital, Istanbul, Turkey
| | - Görsev Yener
- Department of Neurology, Dokuz Eylül University School of Medicine, Izmir, Turkey.,Brain Dynamics Multidisciplinary Research Center, Dokuz Eylül University, Izmir, Turkey.,Izmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, Turkey
| | - Erol Başar
- Brain Dynamics, Cognition and Complex Systems Research Center, Istanbul Kultur University, Istanbul, Turkey
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12
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Benítez-Burraco A, Herrera E, Cuetos F. A core deficit in Parkinson disease? NEUROLOGÍA (ENGLISH EDITION) 2016. [DOI: 10.1016/j.nrleng.2015.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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13
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Cao R, Ye X, Chen X, Zhang L, Chen X, Tian Y, Hu P, Wang K. Exploring Biological Motion Processing in Parkinson's Disease Using Temporal Dilation. PLoS One 2015; 10:e0138502. [PMID: 26381888 PMCID: PMC4575113 DOI: 10.1371/journal.pone.0138502] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 08/31/2015] [Indexed: 11/18/2022] Open
Abstract
Biological motion (BM) perception is the compelling ability of the visual system to perceive complex animated movements effortlessly and promptly. A recent study has shown that BM can automatically lengthen perceived temporal duration independent of global configuration. The present study aimed mainly to investigate this temporal dilation effect of BM signals in Parkinson’s disease (PD) patients. We used the temporal dilation effect as an implicit measure of visual processing of BM. In all, 32 PD patients (under off-therapy conditions) and 32 healthy controls (HCs) participated in our study. In each trial, an upright BM sequence and an inverted BM sequence were presented within an interval in the center of the screen. We tested both canonical and scrambled BM sequences; the scrambled ones were generated by disturbing the global configuration of the canonical ones but preserving exactly the same local motion components. Observers were required to make a verbal two-alternative forced choice response to indicate which interval (the first or the second) appeared longer. Statistical analyses were conducted on the points of subjective equality (PSEs). We found that the temporal dilation effect was significantly reduced for PD patients compared with HCs in both canonical and scrambled BM conditions. Moreover, no temporal dilation effects of scrambled BM were shown in both early- and late-stage PD patients, while the temporal dilation effect of canonical BM was relatively preserved in the early stages.
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Affiliation(s)
- Ruihua Cao
- Department of Geriatric Medicine, Anhui Provincial Hospital, Hefei, Anhui Province, China
| | - Xing Ye
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Xingui Chen
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Long Zhang
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Xianwen Chen
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Yanghua Tian
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Panpan Hu
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
- * E-mail: (KW); (PH)
| | - Kai Wang
- Department of Neurology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
- * E-mail: (KW); (PH)
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14
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Benítez-Burraco A, Herrera E, Cuetos F. [A core deficit in Parkinson disease?]. Neurologia 2015; 31:223-30. [PMID: 26315759 DOI: 10.1016/j.nrl.2015.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 05/13/2015] [Accepted: 05/25/2015] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Parkinson disease is a neurodegenerative condition involving motor, cognitive, and linguistic deficits. It is important to know why all these different deficits co-occur in the affected people. This paper aims to clarify whether these comorbid deficits result from the selective impairment of a computational primitive, namely, a context-sensitive computational ability according to Chomsky's Hierarchy (a well-established research tool in comparative neuroscience). PATIENTS AND METHODS A total of 15 medicated subjects with Parkinson disease and 15 controls were selected. They were matched in age and education. A battery of tasks was designed to test 3 different domains (motor capacities, cognition, and language) and 2 different computational abilities (context-free and context-sensitive operations). RESULTS Significant differences between groups were observed only regarding the linguistic task involving context-sensitive computations (correferences). CONCLUSIONS The observed deficits in our patients with Parkinson disease cannot be explained in terms of the selective impairment of one only unspecific, low-level computational process. At the same time, differences between patients and controls are expected to be greater if the former are not medicated. Moreover, we should pursue in the search of (this kind of) computational primitives than can be selectively impaired in people with Parkinson disease, because they may help to achieve an earlier diagnosis of this condition.
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Affiliation(s)
- A Benítez-Burraco
- Departamento de Filología Española y sus Didácticas, Facultad de Humanidades, Universidad de Huelva, Huelva, España.
| | - E Herrera
- Centro de Innovación en Tecnologías de la Información para Aplicaciones Sociales (CITIAPS), Escuela de Psicología, Universidad de Santiago (USACH), Santiago, Chile
| | - F Cuetos
- Departamento de Psicología, Universidad de Oviedo, Oviedo, España
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15
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Moretti M, Neis VB, Matheus FC, Cunha MP, Rosa PB, Ribeiro CM, Rodrigues ALS, Prediger RD. Effects of Agmatine on Depressive-Like Behavior Induced by Intracerebroventricular Administration of 1-Methyl-4-phenylpyridinium (MPP(+)). Neurotox Res 2015; 28:222-31. [PMID: 26156429 DOI: 10.1007/s12640-015-9540-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 06/26/2015] [Accepted: 07/01/2015] [Indexed: 12/21/2022]
Abstract
Considering that depression is a common non-motor comorbidity of Parkinson's disease and that agmatine is an endogenous neuromodulator that emerges as a potential agent to manage diverse central nervous system disorders, this study investigated the antidepressant-like effect of agmatine in mice intracerebroventricularly (i.c.v.) injected with the dopaminergic neurotoxin 1-methyl-4-phenylpyridinium (MPP(+)). Male C57BL6 mice were treated with agmatine (0.0001, 0.1 or 1 mg/kg) and 60 min later the animals received an i.c.v. injection of MPP(+) (1.8 µg/site). Twenty-four hours after MPP(+) administration, immobility time, anhedonic behavior, and locomotor activity were evaluated in the tail suspension test (TST), splash test, and open field test, respectively. Using Western blot analysis, we investigated the putative modulation of MPP(+) and agmatine on striatal and frontal cortex levels of tyrosine hydroxylase (TH) and brain-derived neurotrophic factor (BDNF). MPP(+) increased the immobility time of mice in the TST, as well as induced an anhedonic-like behavior in the splash test, effects which were prevented by pre-treatment with agmatine at the three tested doses. Neither drug, alone or in combination, altered the locomotor activity of mice. I.c.v. administration of MPP(+) increased the striatal immunocontent of TH, an effect prevented by the three tested doses of agmatine. MPP(+) and agmatine did not alter the immunocontent of BDNF in striatum and frontal cortex. These results demonstrate for the first time the antidepressant-like effects of agmatine in an animal model of depressive-like behavior induced by the dopaminergic neurotoxin MPP(+).
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Affiliation(s)
- Morgana Moretti
- Department of Pharmacology, Center of Biological Sciences, Universidade Federal de Santa Catarina, Florianópolis, SC, 88049-900, Brazil,
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16
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Ottosson J, Lavesson L, Pinzke S, Grahn P. The Significance of Experiences of Nature for People with Parkinson's Disease, with Special Focus on Freezing of Gait--The Necessity for a Biophilic Environment. A Multi-Method Single Subject Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:7274-99. [PMID: 26132480 PMCID: PMC4515656 DOI: 10.3390/ijerph120707274] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 06/03/2015] [Accepted: 06/18/2015] [Indexed: 11/29/2022]
Abstract
Freezing of Gait (FOG) is a common condition in people with Parkinson's disease (PD). FOG entails suddenly experiencing difficulties moving or feeling that one's feet are as glued to the ground. It is triggered, e.g., when passing through doorways. Earlier studies suggest that being in natural environments affects FOG in a positive way. Five subjects were recruited to serve as five single subject cases. We used interviews, observations, questionnaires and collected gait pattern data with aid of an accelerometer. A special designed outdoor setting was used, where we investigated whether passing through hedge openings with or without built elements triggered FOG. We found that no one experienced a FOG reaction when they passed through hedge openings without built elements. However, FOG was triggered when a doorframe was inserted into a hedge opening, and/or when peripheral vision was blocked. We interpret the results such that the doorframe triggered a phobic reflex, causing a freezing reaction. Passing through hedge openings does not trigger FOG, which we interpret as a biophilic reaction. Our results, if repeated in future studies, may have significance to everyday lives of PD patients, who could get a simpler life by consciously prioritizing stays in natural surroundings.
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Affiliation(s)
- Johan Ottosson
- The Department of Work Science, Business Economics and Environmental Psychology, Swedish University of Agricultural Sciences, P.O. Box 88, SE-230 53 Alnarp, Sweden.
| | - Lillian Lavesson
- The Department of Work Science, Business Economics and Environmental Psychology, Swedish University of Agricultural Sciences, P.O. Box 88, SE-230 53 Alnarp, Sweden.
| | - Stefan Pinzke
- The Department of Work Science, Business Economics and Environmental Psychology, Swedish University of Agricultural Sciences, P.O. Box 88, SE-230 53 Alnarp, Sweden.
| | - Patrik Grahn
- The Department of Work Science, Business Economics and Environmental Psychology, Swedish University of Agricultural Sciences, P.O. Box 88, SE-230 53 Alnarp, Sweden.
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17
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Varrone A, Svenningsson P, Marklund P, Fatouros-Bergman H, Forsberg A, Halldin C, Nilsson LG, Farde L. 5-HT1B receptor imaging and cognition: a positron emission tomography study in control subjects and Parkinson's disease patients. Synapse 2015; 69:365-74. [PMID: 25914348 DOI: 10.1002/syn.21823] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 04/12/2015] [Accepted: 04/19/2015] [Indexed: 01/26/2023]
Abstract
INTRODUCTION The serotonin 5-HT1B receptor subtype is involved in the modulation of serotonin release and is a target of interest for neuroreceptor imaging. Previous studies have shown that the serotonin system is affected in Parkinson's disease (PD). Cognitive function, frequently impaired in PD, has been linked to the serotonin system. The aim of this study was to examine whether 5-HT1B receptor availability in the brain of healthy subjects and PD patients is associated with measures of cognitive function. METHODS Twelve control subjects and ten PD patients with normal mini-mental state examination scores were included in this study. Cognitive function was evaluated by assessment of semantic, episodic, and working memory, as well as fluency and visual attention. Creative ability, a measure of divergent thinking, was examined with the alternative uses of objects task. PET measurements were performed with the 5-HT1B receptor-radioligand [(11) C]AZ10419369 using the HRRT system. RESULTS PD patients showed statistically significant lower measures of semantic and episodic memory, as well as creative ability, compared with control subjects. Statistically significant positive correlations were found in control subjects between creative ability and average 5-HT1B receptor availability in grey matter, and in PD patients between scores of Beck Depression Inventory-II and creative ability. CONCLUSION Though creativity has been conventionally linked to dopamine function, our findings in control subjects suggest a link between 5-HT1B receptor availability and creative ability. In PD patients, creative ability was significantly associated with depressive symptoms but not with 5-HT1B receptor availability. This finding deserves further investigation in future studies.
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Affiliation(s)
- Andrea Varrone
- Karolinska Institutet, Department of Clinical Neuroscience, Centre for Psychiatry Research, Stockholm, Sweden.,Stockholm Brain Institute, Stockholm, Sweden
| | - Per Svenningsson
- Stockholm Brain Institute, Stockholm, Sweden.,Karolinska Institutet, Department of Clinical Neuroscience, Centre for Molecular Medicine, Stockholm, Sweden
| | - Petter Marklund
- Stockholm Brain Institute, Stockholm, Sweden.,Department of Psychology, Stockholm University, Sweden
| | - Helena Fatouros-Bergman
- Karolinska Institutet, Department of Clinical Neuroscience, Centre for Psychiatry Research, Stockholm, Sweden
| | - Anton Forsberg
- Karolinska Institutet, Department of Clinical Neuroscience, Centre for Psychiatry Research, Stockholm, Sweden
| | - Christer Halldin
- Karolinska Institutet, Department of Clinical Neuroscience, Centre for Psychiatry Research, Stockholm, Sweden.,Stockholm Brain Institute, Stockholm, Sweden
| | - Lars-Göran Nilsson
- Stockholm Brain Institute, Stockholm, Sweden.,Department of Psychology, Stockholm University, Sweden
| | - Lars Farde
- Karolinska Institutet, Department of Clinical Neuroscience, Centre for Psychiatry Research, Stockholm, Sweden.,Stockholm Brain Institute, Stockholm, Sweden.,AstraZeneca Translational Science Center at Karolinska Institutet, Sweden
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18
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Nowacka B, Lubiński W, Honczarenko K, Potemkowski A, Safranow K. Bioelectrical function and structural assessment of the retina in patients with early stages of Parkinson's disease (PD). Doc Ophthalmol 2015; 131:95-104. [PMID: 25972299 PMCID: PMC4567588 DOI: 10.1007/s10633-015-9503-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 05/07/2015] [Indexed: 11/09/2022]
Abstract
Purpose
To determine bioelectrical function and structural changes of the retina in patients with early stages of Parkinson’s disease (PD). Materials and methods Thirty-eight eyes of 20 patients with early idiopathic PD and 38 eyes of 20 healthy age- and sex-matched controls were ophthalmologically examined, including assessment of distance best-corrected visual acuity (DBCVA), slit lamp examination of the anterior and posterior segment of the eye, evaluation of the eye structures: paramacular retinal thickness (RT) and retinal nerve fiber layer (RNFL) thickness with the aid of OCT, and the bioelectrical function by full-field electroretinogram (ERG). Additionally, PD patients were interviewed as to the presence of dopamine-dependent visual functions abnormalities. Results In patients with early PD, statistically significant changes in comparison with the control group were observed in ERG. They contained a reduction in mean amplitudes of the scotopic a-wave (rod–cone response), the scotopic oscillatory potentials (OPs)—OP2 and OP3, the photopic b-wave, and a reduction in the overall index (OP1 + OP2 + OP3) and a prolongation of mean peak times of the scotopic OP1, OP2, OP3, OP4 (p < 0.05). A questionnaire concerning abnormalities of dopamine-dependent visual functions revealed that PD patients with abnormal peak times of OP1, OP2, and OP3 reported non-specific visual disturbances more frequently in comparison with PD patients with normal peak times of OPs. Other analyzed parameters of ERG, DBCVA, RT, and RNFL did not significantly differ between patients with PD and the control group. Conclusion In patients with early PD, bioelectrical dysfunction of the retina was observed in the ERG test, probably as a result of dopamine deficiency in the retina. The results of our study indicate that ERG may also be a useful tool for understanding the reason for non-specific visual disturbances occurring in PD patients.
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Affiliation(s)
- Barbara Nowacka
- Department of Ophthalmology, Pomeranian Medical University, Powstancow Wlkp. 72, 70-111, Szczecin, Poland.
| | - Wojciech Lubiński
- Department of Ophthalmology, Pomeranian Medical University, Powstancow Wlkp. 72, 70-111, Szczecin, Poland
| | | | | | - Krzysztof Safranow
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland
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19
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Donovan NJ, Boudreaux DM, Savage MC. Objective Measurement of Vocal Parameters in Older People With and Without Parkinson’s Disease in Their Natural Environments: A Pilot Study. ACTA ACUST UNITED AC 2015. [DOI: 10.1044/cicsd_42_s_100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Bizzarri JV, Giupponi G, Maniscalco I, Schroffenegger P, Conca A, Kapfhammer HP. [Parkinson's disease and psychoses]. NEUROPSYCHIATRIE : KLINIK, DIAGNOSTIK, THERAPIE UND REHABILITATION : ORGAN DER GESELLSCHAFT OSTERREICHISCHER NERVENARZTE UND PSYCHIATER 2015; 29:1-13. [PMID: 25586068 DOI: 10.1007/s40211-014-0132-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 11/28/2014] [Indexed: 06/04/2023]
Abstract
Psychotic symptoms are common in Parkinson's disease (PD) and are associated with increased disability, worsened quality of life, and poor long-term prognosis. In this article, clinical features, hypotheses on pathogenesis, and current treatment strategies for Parkinson's disease psychosis (PDP) are reviewed. According to epidemiological studies, the prevalence of PDP is between 20 to 40 %. Complex visual hallucinations are the most common psychotic symptoms and are present in 17-72 % of the patients. Other sensory disturbances encompass tactile hallucinations and minor hallucinatory phenomena, such as sense of presence and visual illusions. Hallucinations are often accompanied by delusions, whose most frequent themes are persecution and jealousy. The pathophysiology of PDP remains unclear. Different factors have been implicated, including Levo-dopa and dopaminergic medications, neurotransmitter imbalances, neuroanatomic alterations, abnormal visuospatial processes, and genetic predisposition. The first-line strategy in the treatment of persistent and problematic PDP is represented by reduction in anti-PD medications. Second-generation antipsychotics are the treatment of choice, with clozapine being demonstrated as the most effective and tolerable drug for PD patients.
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21
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Grünblatt E. Commonalities in the genetics of Alzheimer’s disease and Parkinson’s disease. Expert Rev Neurother 2014; 8:1865-77. [DOI: 10.1586/14737175.8.12.1865] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Ellmore TM, Castriotta RJ, Hendley KL, Aalbers BM, Furr-Stimming E, Hood AJ, Suescun J, Beurlot MR, Hendley RT, Schiess MC. Altered nigrostriatal and nigrocortical functional connectivity in rapid eye movement sleep behavior disorder. Sleep 2013; 36:1885-92. [PMID: 24293763 DOI: 10.5665/sleep.3222] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
STUDY OBJECTIVES Rapid eye movement sleep behavior disorder (RBD) is a condition closely associated with Parkinson disease (PD). RBD is a sleep disturbance that frequently manifests early in the development of PD, likely reflecting disruption in normal functioning of anatomical areas affected by neurodegenerative processes. Although specific neuropathological aspects shared by RBD and PD have yet to be fully documented, further characterization is critical to discovering reliable biomarkers that predict PD onset. In the current study, we tested the hypothesis of altered functional connections of the substantia nigra (SN) in patients in whom RBD was diagnosed. DESIGN Between-groups, single time point imaging. SETTING UTHSC-H 3 telsa MRI center. PARTICIPANTS Ten patients with RBD, 11 patients with PD, and 10 age-matched controls. INTERVENTIONS NA. MEASUREMENTS AND RESULTS We measured correlations of SN time series using resting state blood oxygen level-dependent functional magnetic resonance imaging (BOLD-fMRI) in patients with idiopathic RBD who were at risk for developing PD, patients in whom PD was diagnosed, and age-matched controls. Using voxelwise analysis of variance, different correlations (P < 0.01, whole-brain corrected) between left SN and left putamen were found in patients with RBD compared with controls and patients with PD. SN correlations with right cuneus/precuneus and superior occipital gyrus were significantly different for patients with RBD compared with both controls and patients with PD. CONCLUSIONS The results suggest that altered nigrostriatal and nigrocortical connectivity characterizes rapid eye movement sleep behavior disorder before onset of obvious motor impairment. The functional changes are discussed in the context of degeneration in dopaminergic and cognition-related networks.
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Affiliation(s)
- Timothy M Ellmore
- Department of Psychology and Program in Behavioral and Cognitive Neuroscience, The City College and Graduate Center of the City University of New York, New York, NY
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23
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Stuart S, Alcock L, Galna B, Lord S, Rochester L. The measurement of visual sampling during real-world activity in Parkinson's disease and healthy controls: a structured literature review. J Neurosci Methods 2013; 222:175-88. [PMID: 24291711 DOI: 10.1016/j.jneumeth.2013.11.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/18/2013] [Accepted: 11/19/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND Visual sampling techniques are used to investigate the complex role of vision during real-world activities in Parkinson's disease. Earlier research is limited to static simple tasks or measurement of eye movements alone, but more recent investigations involve more real-world activities. The approach to the objective measurement of eye movements varies with respect to instrumentation, testing protocols, and mediating factors that may influence visual sampling. OBJECTIVES The aim of this review was to examine previous work measuring visual sampling during real-world activities in Parkinson's disease to inform the development of robust protocols. Within this review a real-world activity was considered to be a goal-orientated motor task involving more than one body segment such as reaching or walking. METHODS Medline, Embase, PsychInfo, Scopus, Web of Knowledge, PubMed and the Cochrane library databases were searched. Two independent reviewers and an adjudicator screened articles that described quantitative visual sampling in people with Parkinson's disease and healthy controls. RESULTS Twenty full-text articles were screened and 15 met inclusion/exclusion criteria. A wide range of instruments and outcome measures were reported which were generally used in a task-dependent manner. Instrument reliability and validity was insufficiently reported in all studies. Few studies considered mediators of visual sampling such as visual or cognitive deficits. CONCLUSIONS Future research is required to accurately characterise visual impairments in Parkinson's disease and during real-world activities. Composite use of instruments may be required to achieve reliability and validity of visual sampling outcomes which need to be standardised. Recommendations also include assessment of cognition and basic visual function.
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Affiliation(s)
- Samuel Stuart
- Institute for Ageing and Health, Clinical Ageing Research Unit, Newcastle University, United Kingdom
| | - Lisa Alcock
- Institute for Ageing and Health, Clinical Ageing Research Unit, Newcastle University, United Kingdom
| | - Brook Galna
- Institute for Ageing and Health, Clinical Ageing Research Unit, Newcastle University, United Kingdom
| | - Sue Lord
- Institute for Ageing and Health, Clinical Ageing Research Unit, Newcastle University, United Kingdom
| | - Lynn Rochester
- Institute for Ageing and Health, Clinical Ageing Research Unit, Newcastle University, United Kingdom.
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25
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High-throughput classification of clinical populations from natural viewing eye movements. J Neurol 2012; 260:275-84. [PMID: 22926163 DOI: 10.1007/s00415-012-6631-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 07/17/2012] [Accepted: 07/18/2012] [Indexed: 01/11/2023]
Abstract
Many high-prevalence neurological disorders involve dysfunctions of oculomotor control and attention, including attention deficit hyperactivity disorder (ADHD), fetal alcohol spectrum disorder (FASD), and Parkinson's disease (PD). Previous studies have examined these deficits with clinical neurological evaluation, structured behavioral tasks, and neuroimaging. Yet, time and monetary costs prevent deploying these evaluations to large at-risk populations, which is critically important for earlier detection and better treatment. We devised a high-throughput, low-cost method where participants simply watched television while we recorded their eye movements. We combined eye-tracking data from patients and controls with a computational model of visual attention to extract 224 quantitative features. Using machine learning in a workflow inspired by microarray analysis, we identified critical features that differentiate patients from control subjects. With eye movement traces recorded from only 15 min of videos, we classified PD versus age-matched controls with 89.6 % accuracy (chance 63.2 %), and ADHD versus FASD versus control children with 77.3 % accuracy (chance 40.4 %). Our technique provides new quantitative insights into which aspects of attention and gaze control are affected by specific disorders. There is considerable promise in using this approach as a potential screening tool that is easily deployed, low-cost, and high-throughput for clinical disorders, especially in young children and elderly populations who may be less compliant to traditional evaluation tests.
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26
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Vitório R, Lirani-Silva E, Barbieri FA, Raile V, Batistela RA, Stella F, Gobbi LTB. The role of vision in Parkinson's disease locomotion control: free walking task. Gait Posture 2012; 35:175-9. [PMID: 21962407 DOI: 10.1016/j.gaitpost.2011.09.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 08/22/2011] [Accepted: 09/01/2011] [Indexed: 02/02/2023]
Abstract
The current study addressed the role of visual information in the control of locomotion in people with Parkinson's disease. Twelve healthy individuals and 12 mild to moderate Parkinson's disease patients were examined while walking at self-selected velocities, under three visual sampling conditions: dynamic (normal lighting), static (static visual samples) and voluntary visual sampling. Subjects wore liquid crystal glasses for visual manipulation. Outcome measures included spatial-temporal parameters, braking and propulsive impulses, number of samples and total duration of voluntary visual samples. Interaction between groups and visual conditions was not observed for kinematic parameters or braking and propulsive impulses. There were no significant differences between groups for voluntary visual sampling variables. These findings suggest that the visual control of locomotion in Parkinson's disease patients was similar to that observed in controls. Furthermore, Parkinson's disease patients were not more dependent on visual information than healthy individuals for the locomotion control.
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Affiliation(s)
- Rodrigo Vitório
- UNESP - São Paulo State University at Rio Claro, Av. 24-A, 1515, Rio Claro, SP 13506-900, Brazil.
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27
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Esteve-Rudd J, Fernández-Sánchez L, Lax P, De Juan E, Martín-Nieto J, Cuenca N. Rotenone induces degeneration of photoreceptors and impairs the dopaminergic system in the rat retina. Neurobiol Dis 2011; 44:102-15. [DOI: 10.1016/j.nbd.2011.06.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 05/24/2011] [Accepted: 06/16/2011] [Indexed: 12/21/2022] Open
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28
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Scally K, Charlton JL, Iansek R, Bradshaw JL, Moss S, Georgiou-Karistianis N. Impact of external cue validity on driving performance in Parkinson's disease. PARKINSON'S DISEASE 2011; 2011:159621. [PMID: 21789275 PMCID: PMC3140707 DOI: 10.4061/2011/159621] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Accepted: 03/27/2011] [Indexed: 11/20/2022]
Abstract
This study sought to investigate the impact of external cue validity on simulated driving performance in 19 Parkinson's disease (PD) patients and 19 healthy age-matched controls. Braking points and distance between deceleration point and braking point were analysed for red traffic signals preceded either by Valid Cues (correctly predicting signal), Invalid Cues (incorrectly predicting signal), and No Cues. Results showed that PD drivers braked significantly later and travelled significantly further between deceleration and braking points compared with controls for Invalid and No-Cue conditions. No significant group differences were observed for driving performance in response to Valid Cues. The benefit of Valid Cues relative to Invalid Cues and No Cues was significantly greater for PD drivers compared with controls. Trail Making Test (B-A) scores correlated with driving performance for PDs only. These results highlight the importance of external cues and higher cognitive functioning for driving performance in mild to moderate PD.
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Affiliation(s)
- Karen Scally
- Experimental Neuropsychology Research Unit, School of Psychology and Psychiatry, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton Campus, VIC 3800, Australia
| | - Judith L. Charlton
- Monash Accident Research Centre, Monash University, Clayton Campus, VIC 3800, Australia
| | - Robert Iansek
- Clinical Research Centre for Movement Disorders and Gait, Kingston Centre, Warrigal Road, Cheltenham, VIC 3192, Australia
| | - John L. Bradshaw
- Experimental Neuropsychology Research Unit, School of Psychology and Psychiatry, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton Campus, VIC 3800, Australia
| | - Simon Moss
- School of Psychology, Deakin University, 221 Burwood Highway, Burwood, VIC 3125, Australia
| | - Nellie Georgiou-Karistianis
- Experimental Neuropsychology Research Unit, School of Psychology and Psychiatry, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton Campus, VIC 3800, Australia
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Hallett M. Bradykinesia: why do Parkinson's patients have it and what trouble does it cause? Mov Disord 2011; 26:1579-81. [PMID: 21547949 DOI: 10.1002/mds.23730] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2011] [Accepted: 03/07/2011] [Indexed: 11/10/2022] Open
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Ishioka T, Hirayama K, Hosokai Y, Takeda A, Suzuki K, Nishio Y, Sawada Y, Takahashi S, Fukuda H, Itoyama Y, Mori E. Illusory misidentifications and cortical hypometabolism in Parkinson's disease. Mov Disord 2011; 26:837-43. [DOI: 10.1002/mds.23576] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2009] [Revised: 11/10/2010] [Accepted: 11/11/2010] [Indexed: 11/11/2022] Open
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Specific impairment of visual spatial covert attention mechanisms in Parkinson's disease. Neuropsychologia 2010; 49:34-42. [PMID: 21075128 DOI: 10.1016/j.neuropsychologia.2010.11.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 11/03/2010] [Accepted: 11/07/2010] [Indexed: 11/22/2022]
Abstract
Visual deficits in early and high level processing nodes have been documented in Parkinson's disease (PD). Non-motor high level visual integration deficits in PD seem to have a cortical basis independently of a low level retinal contribution. It is however an open question whether sensory and visual attention deficits can be separated in PD. Here, we have explicitly separated visual and attentional disease related patterns of performance, by using bias free staircase procedures measuring psychophysical contrast sensitivity across visual space under covert attention conditions with distinct types of cues (valid, neutral and invalid). This further enabled the analysis of patterns of dorsal-ventral (up-down) and physiological inter-hemispheric asymmetries. We have found that under these carefully controlled covert attention conditions PD subjects show impaired psychophysical performance enhancement by valid attentional cues. Interestingly, PD patients also show paradoxically increased visual homogeneity of spatial performance profiles, suggesting flattening of high level modulation of spatial attention. Finally we have found impaired higher level attentional modulation of contrast sensitivity in the visual periphery, where mechanisms of covert attention are at higher demands. These findings demonstrate a specific loss of attentional mechanisms in PD and a pathological redistribution of spatial mechanisms of covert attention.
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Barnes J, Connelly V, Wiggs L, Boubert L, Maravic K. Sleep Patterns in Parkinson's Disease Patients with Visual Hallucinations. Int J Neurosci 2010; 120:564-9. [DOI: 10.3109/00207454.2010.494790] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Mendritzki S, Schmidt S, Sczepan T, Zhu XR, Segelcke D, Lübbert H. Spinal cord pathology in alpha-synuclein transgenic mice. PARKINSON'S DISEASE 2010; 2010:375462. [PMID: 20976083 PMCID: PMC2957200 DOI: 10.4061/2010/375462] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 05/04/2010] [Accepted: 06/06/2010] [Indexed: 12/02/2022]
Abstract
Accumulation of α-synuclein is observed in neurodegenerative diseases like Parkinson's disease and Multiple System Atrophy. In previous studies with transgenic C57BL/6 mice overexpressing α-synuclein carrying the mutations A53T and A30P found in Parkinson's disease or with a parkin-null background, we reported severe mitochondrial impairments in neurons and to a larger extent in glial cells of the mesencephalon. Neuron death was not observed in the brain. Here we show that the mice show severe motor impairments in behavioral tests. In addition, these mice exhibit astrocytic cell death in the spinal cord, accompanied by extensive gliosis and microglial activation. This is shown by cell death staining and immunohistochemistry. Ultrastructural analyses revealed severe mitochondrial impairments not only in astrocytes, but also in oligodendrocytes and, to a small extent, in neurons. Thus, the transgenic mice show a profound pathology in glial cells of the spinal cord.
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Affiliation(s)
- Sonja Mendritzki
- Department of Animal Physiology, Biology, and Biotechnology, Ruhr-University Bochum, ND/5131, D-44780 Bochum, Germany
| | - Saskia Schmidt
- Department of Animal Physiology, Biology, and Biotechnology, Ruhr-University Bochum, ND/5131, D-44780 Bochum, Germany
- International Graduate School of Neuroscience (IGSN), Ruhr-University Bochum, 44780 Bochum, Germany
| | - Teresa Sczepan
- Department of Animal Physiology, Biology, and Biotechnology, Ruhr-University Bochum, ND/5131, D-44780 Bochum, Germany
| | - Xin-Ran Zhu
- Department of Animal Physiology, Biology, and Biotechnology, Ruhr-University Bochum, ND/5131, D-44780 Bochum, Germany
| | - Daniel Segelcke
- Department of Animal Physiology, Biology, and Biotechnology, Ruhr-University Bochum, ND/5131, D-44780 Bochum, Germany
| | - Hermann Lübbert
- Department of Animal Physiology, Biology, and Biotechnology, Ruhr-University Bochum, ND/5131, D-44780 Bochum, Germany
- International Graduate School of Neuroscience (IGSN), Ruhr-University Bochum, 44780 Bochum, Germany
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Axial kinesthesia is impaired in Parkinson's disease: effects of levodopa. Exp Neurol 2010; 225:202-9. [PMID: 20599976 DOI: 10.1016/j.expneurol.2010.06.016] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2010] [Revised: 06/09/2010] [Accepted: 06/20/2010] [Indexed: 11/20/2022]
Abstract
Integration of sensory and motor inputs has been shown to be impaired in appendicular muscles and joints of Parkinson's disease (PD) patients. As PD advances, axial symptoms such as gait and balance impairments appear, which often progresses to complete inability stand or walk unaided. The current study evaluates kinesthesia in the axial musculature of PD patients during active postural control to determine whether impairments similar to those found in the appendages are also present in the hip and trunk. Using axial twisting, we quantified the detection threshold and directional accuracy of the hip relative to the feet (i.e. Hip Kinesthesia) and the hip relative to the shoulders (i.e. Trunk Kinesthesia). The relation of kinesthetic threshold to disease progression as measured by UPDRS and the effect of levodopa treatment on kinesthesia were assessed in 12 PD compared to age-matched controls. Subjects stood unaided while passively twisted at a very low constant rotational velocity (1 degrees /s). The results showed that accuracy in determining the direction of axial twisting was reduced in PD relative to healthy control subjects in the hip (PD-ON: 81%; PD-OFF: 91%; CTL=96%) and trunk (PD-ON: 81%; PD-OFF: 88%; CTL=95%). Thresholds for perception of axial twisting were increased when PD subjects were ON levodopa versus OFF in both the hip (p<0.01) and the trunk (p<0.05). The magnitude of decrease in sensitivity due to being ON levodopa was significantly correlated with the increase in UPDRS motor scores (Hip: r=0.90, p<0.01 and Trunk: r=0.60, p<0.05). This effect was not significantly correlated with equivalent levodopa dosage. PD subjects with disease onset on the left side of their body showed significantly higher axial thresholds than subjects with right PD onset (p<0.05). In conclusion, deficits in axial kinesthesia seem to contribute to the functional impairments of posture and locomotion in PD. Although levodopa has been shown to improve appendicular kinesthesia, we observed the opposite in the body axis. These findings underscore the dissociable neurophysiological circuits and dopaminergic pathways that are known to innervate these functionally distinct muscle groups.
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Riederer P, Bartl J, Laux G, Grünblatt E. Diabetes Type II: A Risk Factor for Depression–Parkinson–Alzheimer? Neurotox Res 2010; 19:253-65. [DOI: 10.1007/s12640-010-9203-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 05/25/2010] [Accepted: 05/31/2010] [Indexed: 12/29/2022]
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Pugnetti L, Baglio F, Farina E, Alberoni M, Calabrese E, Gambini A, Di Bella E, Garegnani M, Deleonardis L, Nemni R. EEG Evidence of Posterior Cortical Disconnection in PD and Related Dementias. Int J Neurosci 2010; 120:88-98. [DOI: 10.3109/00207450903436346] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ezzati A, Khadjevand F, Zandvakili A, Abbassian A. Higher-level motion detection deficit in Parkinson's disease. Brain Res 2010; 1320:143-51. [DOI: 10.1016/j.brainres.2010.01.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2009] [Revised: 01/04/2010] [Accepted: 01/10/2010] [Indexed: 11/17/2022]
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Fonseca LC, Tedrus GMAS, Letro GH, Bossoni AS. Dementia, mild cognitive impairment and quantitative EEG in patients with Parkinson's disease. Clin EEG Neurosci 2009; 40:168-72. [PMID: 19715179 DOI: 10.1177/155005940904000309] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The objective of this study was to evaluate relationships between quantitative EEG (qEEG) changes and cognitive disturbance (mild cognitive impairment or dementia) and the motor disturbance stage in Parkinson's disease (PD). Thirty-two PD patients (age = 67.2 +/- 10.0) and 26 normal subjects (age = 68.4 +/- 4.7) were assessed using a neurological evaluation, modified Hoehn and Yahr (HY) scale for PD, a Portuguese version of the CERAD neuropsychological battery (consortium to establish a registry for Alzheimer's disease) incorporating the Mini-mental Status Examination, Clinical Dementia Rating and an EEG analysis of absolute and relative band amplitude at rest. Four groups were compared: three with PD (7 patients with dementia, 10 with mild cognitive impairment and 15 with no cognitive disturbances) and the control group. The qEEG showed no significant differences between the control group and PD patients without cognitive disturbance. Abnormalities on the qEEG were essentially associated with the occurrence of mild cognitive impairment or dementia in patients with PD. There was an increase in the absolute and relative posterior theta amplitude in the groups with mild cognitive impairment or dementia and of the posterior absolute and relative delta amplitude in the group with dementia This study suggested qEEG as a possible physiological tool in the assessment of cognitive aspects in PD.
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Affiliation(s)
- L C Fonseca
- School of Medicine, Pontifícia Universidade Católica de Campinas (PUC-Campinas), Campinas, SP, Brazil.
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Tedrus GMAS, Fonseca LC, Letro GH, Bossoni AS, Samara AB. Dementia and mild cognitive impairment in patients with Parkinson's disease. ARQUIVOS DE NEURO-PSIQUIATRIA 2009; 67:423-7. [DOI: 10.1590/s0004-282x2009000300010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2008] [Accepted: 05/10/2009] [Indexed: 11/22/2022]
Abstract
The objective of this research was to assess the occurrence of cognitive impairment in 32 individuals (average age: 67.2 years old) with Parkinson' disease (PD). Procedures: clinical-neurological assessment; modified Hoehn and Yahr staging scale (HYS); standard neuropsychological battery of CERAD (Consortium to Establish a Registry for Alzheimer' Disease); Pfeffer questionnaire; and Clinical Dementia Rating. A comparison was made with a control group (CG), consisting of 26 individuals with similar age and educational level but without cognitive impairment. The PD patients showed an inferior performance in the CERAD battery when compared to the CG. Three PD sub-groups were characterised according to cognition: no cognitive impairment - 15 cases; mild cognitive impairment - 10; dementia - 7 cases. There was a significant association between motor disability (HYS) and the occurrence of dementia. Dementia and mild cognitive impairment frequently occur in PD patients and should be investigated in a routine way.
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41
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Crucian GP, Armaghani S, Armaghani A, Foster PS, Burks DW, Skoblar B, Drago V, Heilman KM. Visual–spatial disembedding in Parkinson's disease. J Clin Exp Neuropsychol 2009; 32:190-200. [DOI: 10.1080/13803390902902441] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Gregory P. Crucian
- a University of Canterbury , Christchurch, New Zealand
- b Canterbury District Health Board , Burwood Hospital , Christchurch, New Zealand
- c University of Florida, Department of Neurology , Gainesville, FL, USA
| | - Sheyan Armaghani
- c University of Florida, Department of Neurology , Gainesville, FL, USA
| | - Avan Armaghani
- c University of Florida, Department of Neurology , Gainesville, FL, USA
| | - Paul S. Foster
- c University of Florida, Department of Neurology , Gainesville, FL, USA
- d Malcom Randall VA Medical Center , Gainesville, FL, USA
| | - David W. Burks
- c University of Florida, Department of Neurology , Gainesville, FL, USA
- d Malcom Randall VA Medical Center , Gainesville, FL, USA
| | - Barry Skoblar
- e University of Florida Department of Clinical and Health Psychology , Gainesville, FL, USA
| | - Valeria Drago
- c University of Florida, Department of Neurology , Gainesville, FL, USA
| | - Kenneth M. Heilman
- c University of Florida, Department of Neurology , Gainesville, FL, USA
- d Malcom Randall VA Medical Center , Gainesville, FL, USA
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Nagel F, Bähr M, Dietz GPH. Tyrosine hydroxylase-positive amacrine interneurons in the mouse retina are resistant against the application of various parkinsonian toxins. Brain Res Bull 2009; 79:303-9. [PMID: 19406215 DOI: 10.1016/j.brainresbull.2009.04.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 04/20/2009] [Accepted: 04/20/2009] [Indexed: 11/18/2022]
Abstract
Toxins such as 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), 6-hydroxydopamine (6-OHDA), or rotenone have been used to induce degeneration of dopaminergic (DA) neurons in the nigrostriatal pathway and to reproduce pathological characteristics of Parkinson's disease (PD). DA neurons are also present in the retina, and visual impairments in PD patients have been reported. We examined the vulnerability of TH-positive (TH(+)) amacrine interneurons in the retina against MPTP, 6-OHDA, or rotenone-induced cell death. We intraperitoneally (i.p.) injected mice with MPTP, which induced degeneration of DA neurons in the midbrain. However, no death of TH(+) amacrine cells was detectable in the same mice. HPLC analysis revealed a 9 times lower level of the toxic metabolite of MPTP, MPP(+), in the eye compared with the striatum. Another membrane-permeable compound (Tat-Hsp70) could be delivered into the retina after i.p. application, suggesting that the blood-retina barrier (BRB) could be overcome after systemic application. Possible reason for the survival of retinal amacrine cells after systemic MPTP application was a less efficient conversion into toxic MPP(+) in the retina or a general higher resistance against toxic insults of retinal DA neurons compared with DA neurons in the substantia nigra pars compacta (SNpc). Therefore, we directly injected high doses of MPP(+), 6-OHDA, or rotenone into the eye. No loss of TH(+) amacrine cells in the retina was observed, suggesting different properties and less vulnerability of amacrine neurons compared with DA neurons in the midbrain.
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Affiliation(s)
- Florian Nagel
- Department of Neurology, Georg-August-Universität Göttingen, Waldweg 33, 37073 Göttingen, Germany
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Zaleski C, Bassett AS, Tam K, Shugar AL, Chow EWC, McPherson E. The co-occurrence of early onset Parkinson disease and 22q11.2 deletion syndrome. Am J Med Genet A 2009; 149A:525-8. [PMID: 19208384 DOI: 10.1002/ajmg.a.32650] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christina Zaleski
- Department of Medical Genetic Services, Marshfield Clinic, Marshfield, Wisconsin 54449, USA
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Moes E, Lombardi KM. The Relationship between Contrast Sensitivity, Gait, and Reading Speed in Parkinson's Disease. AGING NEUROPSYCHOLOGY AND COGNITION 2009; 16:121-32. [DOI: 10.1080/13825580802233418] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Castelo-Branco M, Mendes M, Silva F, Massano J, Januário G, Januário C, Freire A. Motion integration deficits are independent of magnocellular impairment in Parkinson’s disease. Neuropsychologia 2009; 47:314-20. [DOI: 10.1016/j.neuropsychologia.2008.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2008] [Revised: 08/27/2008] [Accepted: 09/01/2008] [Indexed: 11/15/2022]
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Donovan NJ, Kendall DL, Young ME, Rosenbek JC. The communicative effectiveness survey: preliminary evidence of construct validity. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2008; 17:335-347. [PMID: 18957572 DOI: 10.1044/1058-0360(2008/07-0010)] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
PURPOSE To provide preliminary evidence of the construct validity of the Communicative Effectiveness Survey (CES) for individuals with dysarthria and idiopathic Parkinson's disease (PD). METHOD In a prospective, quasi-experimental design, 25 participants each were assigned to 3 groups (N = 75): PD and dysarthria, non-PD and no dysarthria, and PD significant others (SOs). Mean CES ratings were used to test for significant differences between the PD and non-PD group, and PD and SO rating of PD's communicative effectiveness. Multiple linear regression tested for significant predictors of CES ratings for PD group only using sentence intelligibility and spontaneous speech intelligibility scores as predictor variables. RESULTS The PD group rated their CES significantly lower than did the non-PD group. The PD group rated their CES significantly higher than their SOs rated them. Neither speech intelligibility score was a significant predictor of CES ratings. In follow-up analysis, the Hoehn and Yahr PD staging accounted for 47% of the variability in CES ratings for the PD group participants. CONCLUSIONS This study provides preliminary evidence of the CES's construct validity. Clinicians and researchers who assess and treat individuals with PD may consider adding an additional assessment to the traditional clinical measures (i.e., speech intelligibility) by obtaining a measure of communicative effectiveness.
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Affiliation(s)
- Neila J Donovan
- VA HSR&D/RR&D Rehabilitation Outcomes Research Center, VA RR&D Brain Rehabilitation Outcomes Research Center, University of Florida, Florida, USA.
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Onofrj M, Thomas A, Bonanni L. New approaches to understanding hallucinations in Parkinson's disease: phenomenology and possible origins. Expert Rev Neurother 2008; 7:1731-50. [PMID: 18052766 DOI: 10.1586/14737175.7.12.1731] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The authors review current literature on hallucinations in Parkinson's disease (PD). Recent neuropathological studies showed that hallucinations occur in synucleinopathies and are a significant predictor of Lewy Body depositions. Therefore, hallucinations are a hallmark of PD and of dementia with Lewy Bodies. Visual hallucinations are mostly complex and kinematic; preserved or disturbed insight on the nature of hallucinations is a major prognostic factor, although eventually all hallucinators will present with reduced insight. Current theories on the origin of hallucinations point to visual dysfunction, dream overflow and cognitive impairment, yet objection can be raised on each one of the putative models of hallucinations. Understanding of the origin of hallucinations is required in order to develop treatments: all treatment evaluations were focused in general on psychosis, and only clozapine obtained positive evidence-based ratings on efficacy. However, it is likely that cholinesterase inhibitors, antipsychotics and anti-5-hydroxytryptamine(3) agents and drugs acting on sleep regulation will have different and perhaps opposite effects on different types of hallucinations, whether they are accompanied by disturbed insight, sleep disorders or other psychotic features. Further studies will try to separate phenomenology and responses to treatment and will investigate the relevance of concomitant sleep disorders and abnormality of frontoparietal networks involved in the attention process.
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Affiliation(s)
- Marco Onofrj
- University G. D'Annunzio, Department of Neurophysiopathology, Chieti-Pescara, 65124, Pescara, Italy.
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48
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Sil'kis IG. The contribution of synaptic plasticity in the basal ganglia to the processing of visual information. ACTA ACUST UNITED AC 2008; 37:779-90. [PMID: 17922242 DOI: 10.1007/s11055-007-0082-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2005] [Accepted: 09/06/2006] [Indexed: 02/04/2023]
Abstract
A mechanism for the involvement of the basal ganglia in the processing of visual information, based on dopamine-dependent modulation of the efficiency of synaptic transmission in interconnected parallel associative and limbic cortex-basal ganglia-thalamus-cortex circuits, is proposed. Each circuit consists of a visual or prefrontal area of the cortex connected with the thalamic nucleus and the corresponding areas in different nuclei of the basal ganglia. The circulation of activity in these circuits is supported by the recurrent arrival of information in the thalamus and cortex. Dopamine released in response to a visual stimulus modulates the efficiencies of "strong" and "weak" corticostriatal inputs in different directions, and the subsequent reorganization of activity in the circuit leads to disinhibition (inhibition) of the activity of those cortical neurons which are "strongly" ("weakly") excited by the visual stimulus simultaneously with dopaminergic cells. The pattern in each cortical area is the neuronal reflection of the properties of the visual stimulus processed by this area. Excitation of dopaminergic cells by the visual stimulus via the superior colliculi requires parallel activation of the disinhibitory input to the superior colliculi via the thalamus and the "direct" pathway" in the basal ganglia. The prefrontal cortex, excited by the visual stimulus via the mediodorsal nucleus of the thalamus, mediates the descending influence on the activity of dopaminergic cells, simultaneously controlling dopamine release in different areas of the striatum and thus facilitating the mutual selection of neural reflections of the individual properties of the visual stimulus and their binding into an integral image.
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Affiliation(s)
- I G Sil'kis
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia.
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Yavas GF, Yilmaz O, Küsbeci T, Oztürk F. The effect of levodopa and dopamine agonists on optic nerve head in Parkinson disease. Eur J Ophthalmol 2007; 17:812-6. [PMID: 17932860 DOI: 10.1177/112067210701700520] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE To evaluate the effects of levodopa and dopamine agonists on retinal nerve fiber layer using scanning laser ophthalmoscope. METHODS Forty-four patients with the diagnosis of Parkinson disease and receiving levodopa or dopamine agonist monotherapy were included in this prospective study. The control group consisted of 21 normal cases. The optic nerve head images were taken with Heidelberg Retina Tomograph; rim area, rim volume, mean retinal nerve fiber layer thickness, and the results of Moorfields regression analysis were calculated. The measurement results were evaluated with Kruskal Wallis test and Mann-Whitney U-test. RESULTS There was no significant difference in mean age among groups (p=0.093). Retinal nerve fiber layer was measured to be significantly decreased in cases with Parkinson disease (p=0.004) while rim area and rim volume did not show a significant change (p=0.224, p=0.804 respectively). Rim area, rim volume, and retinal nerve fiber layer were significantly greater in the group treated with levodopa while it was the thinnest in the group receiving dopamine agonists. CONCLUSIONS Levodopa can have a protective affect to retinal nerve fiber layer in Parkinson disease compared to dopamine agonists.
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Affiliation(s)
- G F Yavas
- Department of Ophthalmology, School of Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey.
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50
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Correlation between retinal morphological and functional findings and clinical severity in Parkinson’s disease. Doc Ophthalmol 2007; 116:137-46. [DOI: 10.1007/s10633-007-9091-8] [Citation(s) in RCA: 152] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Accepted: 10/11/2007] [Indexed: 02/05/2023]
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