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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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Salazar RD, Moon KLM, Neargarder S, Cronin-Golomb A. Spatial judgment in Parkinson's disease: Contributions of attentional and executive dysfunction. Behav Neurosci 2020; 133:350-360. [PMID: 31294590 DOI: 10.1037/bne0000329] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Spatial judgment is impaired in Parkinson's disease (PD), with previous research suggesting that disruptions in attention and executive function are likely contributors. If judgment of center places demands on frontal systems, performance on tests of attention/executive function may correlate with extent of bias in PD, and attentional disturbance may predict inconsistency in spatial judgment. The relation of spatial judgment to attention/executive function may differ for those with left-side versus right-side motor onset (LPD, RPD), reflecting effects of attentional lateralization. We assessed 42 RPD, 37 LPD, and 67 healthy control participants with a Landmark task (LM) in which a cursor moved horizontally from the right (right-LM) or left (left-LM). The task was to judge the center of the line. Participants also performed neuropsychological tests of attention and executive function. LM group differences were found on left-LM only, with both PD subgroups biased leftward of the control group (RPD p < .05; LPD p < .01; no RPD-LPD difference). For left-LM trials, extent of bias significantly correlated with performance on the cognitive tasks for PD but not for the control group. PD showed greater variability in perceived center than the control group; this variability correlated with performance on the cognitive tasks. The correlations between performance on the test of spatial judgment and the tests of attention/executive function suggest that frontal-based attentional dysfunction affects dynamic spatial judgment, both in extent of spatial bias and in consistency of response as indexed by intertrial variability. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
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Affiliation(s)
- Robert D Salazar
- Department of Psychological and Brain Sciences, Boston University
| | - Kathryn L M Moon
- Department of Psychological and Brain Sciences, Boston University
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Palermo S, Salatino A, Romagnolo A, Zibetti M, Chillemi G, Lopiano L. Preliminary evidence from a Line-Bisection Task for visuospatial neglect in Parkinson's disease. Parkinsonism Relat Disord 2018; 54:113-115. [PMID: 29628330 DOI: 10.1016/j.parkreldis.2018.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 03/25/2018] [Accepted: 04/01/2018] [Indexed: 11/17/2022]
Affiliation(s)
- Sara Palermo
- Department of Neuroscience, University of Turin, Via Cherasco 15, 10126 Turin, Italy
| | - Adriana Salatino
- SAMBA (SpAtial, Motor and Bodily Awareness) Research Group, Department of Psychology, University of Turin, Via Po 14, Turin, Italy.
| | - Alberto Romagnolo
- Department of Neuroscience, University of Turin, Via Cherasco 15, 10126 Turin, Italy
| | - Maurizio Zibetti
- Department of Neuroscience, University of Turin, Via Cherasco 15, 10126 Turin, Italy
| | - Gaetana Chillemi
- IRCCS Centro Neurolesi "BoninoPulejo", S.S. 113, Via Palermo, C.da Casazza, 98124 Messina, Italy
| | - Leonardo Lopiano
- Department of Neuroscience, University of Turin, Via Cherasco 15, 10126 Turin, Italy
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Pawlitzki E, Schlenstedt C, Schmidt N, Rotkirch I, Gövert F, Hartwigsen G, Witt K. Spatial orientation and postural control in patients with Parkinson's disease. Gait Posture 2018; 60:50-54. [PMID: 29153480 DOI: 10.1016/j.gaitpost.2017.11.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/31/2017] [Accepted: 11/11/2017] [Indexed: 02/02/2023]
Abstract
Postural instability is one of the most disabling and risky symptoms of advanced Parkinson's disease (PD). The purpose of this study was to investigate whether and how this is mediated by a centrally impaired spatial orientation. Therefore, we performed a spatial orientation study in 21 PD patients (mean age 68years, SD 8.5 years, 9 women) in a medically on condition and 21 healthy controls (mean age 68.9years, SD 5.5years, 14 women). We compared their spatial responses to the horizontal axis (Sakashita's visual target cancellation task), the vertical axis (bucket-test), the sagittal axis (tilt table test) and postural stability using the Fullerton Advanced Balance Scale (FAB). We found larger deviations on the vertical axis in PD patients, although the direct comparisons of performance in PD patients and healthy controls did not reveal significant differences. While the total scores of the FAB Scale were significantly worse in PD (25.9 points, SD 7.2 points) compared to controls (35.1 points, SD 2.3 points, p<0.01), the results from the spatialorientation task did not correlate with the FAB Scale. In summary, our results argue against a relation between perceptional deficits of spatial information and postural control in PD. These results are in favor of a deficit in higher order integration of spatial stimuli in PD that might influence balance control.
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Affiliation(s)
- E Pawlitzki
- University Medical Center Schleswig-Holstein, Christian-Albrechts-University, Department of Neurology, Arnold-Heller-Straße 3, 24105 Kiel, Germany.
| | - C Schlenstedt
- University Medical Center Schleswig-Holstein, Christian-Albrechts-University, Department of Neurology, Arnold-Heller-Straße 3, 24105 Kiel, Germany
| | - N Schmidt
- University Medical Center Schleswig-Holstein, Christian-Albrechts-University, Department of Neurology, Arnold-Heller-Straße 3, 24105 Kiel, Germany
| | - I Rotkirch
- University Medical Center Schleswig-Holstein, Christian-Albrechts-University, Department of Neurology, Arnold-Heller-Straße 3, 24105 Kiel, Germany
| | - F Gövert
- University Medical Center Schleswig-Holstein, Christian-Albrechts-University, Department of Neurology, Arnold-Heller-Straße 3, 24105 Kiel, Germany
| | - G Hartwigsen
- Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences Leipzig, Stephanstraße 1a, 04103 Leipzig, Germany
| | - K Witt
- University Medical Center Schleswig-Holstein, Christian-Albrechts-University, Department of Neurology, Arnold-Heller-Straße 3, 24105 Kiel, Germany; Department of Neurology, School of Medicine and Health Sciences - European Medical School, University Oldenburg, Steinweg 13-17, 26122 Oldenburg, Germany
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Stuart S, Galna B, Delicato LS, Lord S, Rochester L. Direct and indirect effects of attention and visual function on gait impairment in Parkinson's disease: influence of task and turning. Eur J Neurosci 2017; 46:1703-1716. [PMID: 28444834 DOI: 10.1111/ejn.13589] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 04/11/2017] [Accepted: 04/12/2017] [Indexed: 12/26/2022]
Abstract
Gait impairment is a core feature of Parkinson's disease (PD) which has been linked to cognitive and visual deficits, but interactions between these features are poorly understood. Monitoring saccades allows investigation of real-time cognitive and visual processes and their impact on gait when walking. This study explored: (i) saccade frequency when walking under different attentional manipulations of turning and dual-task; and (ii) direct and indirect relationships between saccades, gait impairment, vision and attention. Saccade frequency (number of fast eye movements per-second) was measured during gait in 60 PD and 40 age-matched control participants using a mobile eye-tracker. Saccade frequency was significantly reduced in PD compared to controls during all conditions. However, saccade frequency increased with a turn and decreased under dual-task for both groups. Poorer attention directly related to saccade frequency, visual function and gait impairment in PD, but not controls. Saccade frequency did not directly relate to gait in PD, but did in controls. Instead, saccade frequency and visual function deficit indirectly impacted gait impairment in PD, which was underpinned by their relationship with attention. In conclusion, our results suggest a vital role for attention with direct and indirect influences on gait impairment in PD. Attention directly impacted saccade frequency, visual function and gait impairment in PD, with connotations for falls. It also underpinned indirect impact of visual and saccadic impairment on gait. Attention therefore represents a key therapeutic target that should be considered in future research.
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Affiliation(s)
- Samuel Stuart
- Clinical Ageing Research Unit, Institute of Neuroscience, Newcastle University Institute of Ageing, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, UK.,Newcastle upon Tyne Hospitals NHS foundation trust, Newcastle upon Tyne, UK
| | - Brook Galna
- Clinical Ageing Research Unit, Institute of Neuroscience, Newcastle University Institute of Ageing, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, UK
| | - Louise S Delicato
- Clinical Ageing Research Unit, Institute of Neuroscience, Newcastle University Institute of Ageing, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, UK.,School of Psychology, University of Sunderland, Sunderland, UK
| | - Sue Lord
- Clinical Ageing Research Unit, Institute of Neuroscience, Newcastle University Institute of Ageing, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, UK
| | - Lynn Rochester
- Clinical Ageing Research Unit, Institute of Neuroscience, Newcastle University Institute of Ageing, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, UK.,Newcastle upon Tyne Hospitals NHS foundation trust, Newcastle upon Tyne, UK
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Abstract
Posterior cortical atrophy (PCA) is a syndrome caused by a neurodegenerative disease that often presents with visuospatial deficits, and can be debilitating. PCA is often characterized by elements of Balint's syndrome and dyslexia. The most common underlying pathology has been found to be Alzheimer's disease. Signs of horizontal neglect are frequently associated with PCA, but the presence of vertical (or altitudinal) neglect has not yet been reported in a patient with PCA or other forms of neurodegenerative dementia. In this paper, we present a patient with PCA who on vertical line bisection and cancellation tests revealed upper altitudinal spatial neglect. Detection of this abnormality may have important implications for diagnosis, therapeutic interventions, and patient safety.
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Affiliation(s)
- Hilary Glazer
- a Comprehensive Center for Brain Health and Memory , Memorial Neuroscience Institute , Hollywood , FL , USA
| | - Leila Saadatpour
- b Department of Neurology and Center for Neuropsychological Studies , University of Florida , Gainesville , Florida , USA.,c Florida Department of Elder Affairs , Alzheimer's Disease Initiative, University of Florida Cognitive and Memory Disorder Clinics , Gainesville , Florida , USA
| | - Leilani Doty
- b Department of Neurology and Center for Neuropsychological Studies , University of Florida , Gainesville , Florida , USA.,c Florida Department of Elder Affairs , Alzheimer's Disease Initiative, University of Florida Cognitive and Memory Disorder Clinics , Gainesville , Florida , USA.,d Department of Elder Affairs, National Institutes of Health/National Institute of Aging 1Florida , Alzheimer's Disease Research Center , Gainesville , Florida , USA
| | - Kenneth M Heilman
- b Department of Neurology and Center for Neuropsychological Studies , University of Florida , Gainesville , Florida , USA.,c Florida Department of Elder Affairs , Alzheimer's Disease Initiative, University of Florida Cognitive and Memory Disorder Clinics , Gainesville , Florida , USA.,d Department of Elder Affairs, National Institutes of Health/National Institute of Aging 1Florida , Alzheimer's Disease Research Center , Gainesville , Florida , USA.,e Department of Neurology , Malcom Randall Veterans Affairs Medical Center , Gainesville , FL , USA
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Lemos J, Pereira D, Almendra L, Rebelo D, Patrício M, Castelhano J, Cunha G, Januário C, Cunha L, Freire A, Castelo-Branco M. Distinct functional properties of the vertical and horizontal saccadic network in Health and Parkinson's disease: An eye-tracking and fMRI study. Brain Res 2016; 1648:469-484. [DOI: 10.1016/j.brainres.2016.07.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 07/19/2016] [Accepted: 07/20/2016] [Indexed: 10/21/2022]
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Usefulness of cube copying in evaluating clinical profiles of patients with Parkinson disease. Cogn Behav Neurol 2014; 26:140-5. [PMID: 24077573 DOI: 10.1097/wnn.0000000000000006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To clarify the relationship between the quantitatively assessed cube-copying test (CCT) and clinical profiles of cognitive and motor ability in Chinese patients with Parkinson disease (PD). METHODS We gave the Montreal Cognitive Assessment (MoCA), which includes the CCT, to evaluate the cognitive function of 102 outpatients with PD. We also gave the Unified Parkinson's Disease Rating Scale (UPDRS) II and III and the Hoehn-Yahr scale to evaluate the patients' motor function and disease severity, respectively. We used Maeshima's method for quantitative assessment of the CCT, and calculated CCT errors by adding incomplete connections and plane-drawing errors. We divided the patients into 2 groups based on normal (no errors) versus abnormal (≥1 errors) CCT scores. RESULTS We found 34 patients with normal scores and 68 with abnormal scores. The 2 groups had significant differences in age of onset, MoCA score, UPDRS II and III scores, and cognitive deterioration rate. CCT errors correlated inversely with cognitive domains except for orientation. Executive function was most commonly affected in both groups. We found correlations between numbers of CCT errors and left-limb movement, fine hand movement, postural instability and gait disorders, UPDRS II and III scores, and cognitive and motor deterioration rates. CONCLUSIONS The quantitatively assessed CCT may be useful in estimating cognitive and motor dysfunction in patients with PD, and in monitoring disease progression.
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Suavansri K, Falchook AD, Williamson JB, Heilman KM. Right up there: Hemispatial and hand asymmetries of altitudinal pseudoneglect. Brain Cogn 2012; 79:216-20. [DOI: 10.1016/j.bandc.2012.03.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Revised: 03/03/2012] [Accepted: 03/11/2012] [Indexed: 10/28/2022]
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Suárez H, Geisinger D, Ferreira E, Suárez A, Román CS, Sotta G. Visual gravitational vertical perception in peripheral vestibular hypofunction. Acta Otolaryngol 2012; 132:415-9. [PMID: 22073979 DOI: 10.3109/00016489.2011.629631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSIONS Rise time in the estimation of the gravitational vertical in the head tilt response (HTR) test is increased in patients with peripheral vestibular lesions and residual chronic dizziness. OBJECTIVE Assessment of the perception of the gravitational vertical in patients with peripheral vestibular lesions through the HTR. METHODS HTR was studied in 12 patients with peripheral vestibular lesion, 8 clinically with chronic dizziness and 4 without it; 23 normal subjects were studied as control group. Two parameters of the HTR were assessed, rise time and steady-state error to characterize a dynamical system step response. The Kolmogorov-Smirnov test (alpha = 5%) was used to verify normal distribution (steady-state error, p = 0.53; rise time, p = 0.88). The three sigma ellipse was calculated for the control group. ROC curves were used to measure the sensitivity and specificity of these parameters. RESULTS Rise time showed increased values in peripheral vestibular lesion patients with chronic dizziness. Two-dimensional analysis (rise time vs steady-state error) allows a better discrimination between patients with peripheral vestibular hypofunction with chronic dizziness and the rest of the studied population.
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Affiliation(s)
- Hamlet Suárez
- Biomedical Engineering Program, Laboratory of Otoneurology, British Hospital, Montevideo, Uruguay.
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Cognitive Differences Between Patients with Left-sided and Right-sided Parkinson’s Disease. A Review. Neuropsychol Rev 2011; 21:405-24. [DOI: 10.1007/s11065-011-9182-x] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Accepted: 09/06/2011] [Indexed: 10/17/2022]
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