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Cucca A, Manara CV, Catalan M, Liccari M, Antonutti L, Lombardo TMI, Cenacchi V, Rangan S, Mingolo S, Crisafulli C, Dore F, Murgia M, Agostini T, Manganotti P. Using illusions to understand hallucinations: differences in perceptual performances on illusory figures may underscore specific visuoperceptual impairments in Parkinson's disease. Front Neurosci 2023; 17:1256224. [PMID: 38125403 PMCID: PMC10732246 DOI: 10.3389/fnins.2023.1256224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/06/2023] [Indexed: 12/23/2023] Open
Abstract
Visual hallucinations are prevalent, potentially disabling symptoms of Parkinson's Disease. Multiple impairments in bottom-up sensory processing and top-down perceptual modulation are implicated in the pathophysiology of these phenomena. In healthy individuals, visual illusions are elicited by illusory figures through parametric manipulations of geometrical configurations, contrast, color, or spatial relationships between stimuli. These illusory percepts provide insight on the physiologic processes subserving conscious and unconscious perception. In this exploratory, cross-sectional, controlled study, perceptual performance on illusory figures was assessed on 11 PD patients with hallucinations, 10 non-hallucinating PD patients, and 10 age-matched healthy individuals. In order to characterize potential neural substrates of perceptual performances, patients' brain metabolic patterns on FDG PET were also analyzed. Illusions relying on attentional modulation and global perception were attenuated in PD patients without hallucinations. This pattern was no longer recognizable in hallucinating patients. Conversely, illusory effects normally counteracted by figure to background segregation and overlapping figures recognition were enhanced in PD patients with hallucinations. FDG PET findings further suggest that perceptual differences between PD patients might be linked to abnormal top-down perceptual modulation.
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Affiliation(s)
- Alberto Cucca
- Department of Life Sciences, University of Trieste, Trieste, Italy
- Department of Neurology, New York University Grossman School of Medicine, New York, NY, United States
| | | | - Mauro Catalan
- Neurology Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Marco Liccari
- Neurology Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Lucia Antonutti
- Neurology Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | | | - Valentina Cenacchi
- Neurology Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Sophie Rangan
- Neurology Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Serena Mingolo
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Carmelo Crisafulli
- Nuclear Medicine, Imaging Diagnostic Department University Hospital and Health Services of Trieste, Trieste, Italy
| | - Franca Dore
- Nuclear Medicine, Imaging Diagnostic Department University Hospital and Health Services of Trieste, Trieste, Italy
| | - Mauro Murgia
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Tiziano Agostini
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Paolo Manganotti
- Neurology Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
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Li T, Liu T, Zhang J, Ma Y, Wang G, Suo D, Yang B, Wang X, Funahashi S, Zhang K, Fang B, Yan T. Neurovascular coupling dysfunction of visual network organization in Parkinson's disease. Neurobiol Dis 2023; 188:106323. [PMID: 37838006 DOI: 10.1016/j.nbd.2023.106323] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/11/2023] [Accepted: 10/11/2023] [Indexed: 10/16/2023] Open
Abstract
Parkinson's disease (PD) has been showed perfusion and neural activity alterations in specific regions, such as the motor and visual networks; however, the clinical significance of coupling changes is still unknown. To identify how neurovascular coupling changes during the pathophysiology of PD, patients and healthy controls underwent multiparametric magnetic resonance imaging to measure neural activity organization of segregation and integration using amplitude of low-frequency fluctuation (ALFF) and functional connectivity strength (FCS), and measure vascular responses using cerebral blood flow (CBF). Neurovascular coupling was calculated as the global CBF-ALFF and CBF-FCS coupling and the regional CBF/ALFF and CBF/FCS ratio. Correlations and dynamic causal modeling was then used to evaluate relationships with disease-alterations to clinical variables and information flow. Neurovascular coupling was impaired in PD with decreased global CBF-ALFF and CBF-FCS coupling, as well as decreased CBF/ALFF in the parieto-occipital cortex (dorsal visual stream) and CBF/FCS in the temporo-occipital cortex (ventral visual stream); these decouplings were associated with motor and non-motor impairments. The distinctive patterns of neurovascular coupling alterations within the dorsal and ventral visual streams of the visual system could potentially provide additional understanding into the pathophysiological mechanisms of PD.
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Affiliation(s)
- Ting Li
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Tiantian Liu
- School of Medical Technology, Beijing Institute of Technology, Beijing, China.
| | - Jian Zhang
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Yunxiao Ma
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Gongshu Wang
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Dingjie Suo
- School of Medical Technology, Beijing Institute of Technology, Beijing, China
| | - Bowen Yang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xiu Wang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Shintaro Funahashi
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing, China
| | - Kai Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Boyan Fang
- Parkinson Medical Center, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, 100144, China
| | - Tianyi Yan
- School of Medical Technology, Beijing Institute of Technology, Beijing, China.
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3
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Shinohara M, Yokoi K, Hirayama K, Kanno S, Hosokai Y, Nishio Y, Ishioka T, Otsuki M, Takeda A, Baba T, Aoki M, Hasegawa T, Kikuchi A, Narita W, Mori E, Suzuki K. Mirror writing and cortical hypometabolism in Parkinson's disease. PLoS One 2022; 17:e0279007. [PMID: 36516196 PMCID: PMC9750002 DOI: 10.1371/journal.pone.0279007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 11/29/2022] [Indexed: 12/15/2022] Open
Abstract
Mirror writing (MW) is the production of individual letters, words, or word strings in the reverse direction. Parkinson's disease (PD) is a progressive neurodegenerative disorder, and high MW rates have been reported in patients with PD. Thus, the present study sought to identify the factors that cause MW in patients with PD. We examined the frequency of MW in patients with PD and investigated the area of the brain where such frequency inversely correlates with reduced regional cerebral metabolic rates of glucose (rCMRglc). We also examined whether this area satisfied the motor and visual monitoring hypotheses of MW that have been presented in previous studies. Thirty-six subjects with idiopathic PD and 23 healthy controls were included in the study. We asked the participants to write down words, numerals, and sentences from left to right using their dominant and non-dominant hands. Patients with PD underwent an 18F-fluorodeoxyglucose positron emission tomography scan to measure the rCMRglc. Neither the patients with PD nor the healthy subjects exhibited MW in the use of the right hand. In the use of the left hand, MW occurred in 15 of the 36 patients with PD, but in none of the healthy controls. The right intraparietal sulcus was identified as the area where rCMRglc was inversely correlated with the number of left-right reversed characters. Previous functional imaging studies have suggested that the right superior parietal cortex and intraparietal sulcus play an important role in recognizing left-right reversed letters. Therefore, dysfunction in the intraparietal sulcus may hinder the recognition of left-right reversed characters, resulting in MW. Consequently, our findings in patients with PD are consistent with the visual-monitoring hypothesis of MW.
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Affiliation(s)
- Mayumi Shinohara
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
- Department of Health and Welfare Science, Faculty of Sports Science, Sendai University, Shibata-machi, Shibata-gun, Miyagi, Japan
| | - Kayoko Yokoi
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
- Department of Occupational Therapy, Yamagata Prefectural University of Health Sciences, Yamagata City, Yamagata, Japan
- * E-mail:
| | - Kazumi Hirayama
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
- Department of Occupational Therapy, Yamagata Prefectural University of Health Sciences, Yamagata City, Yamagata, Japan
| | - Shigenori Kanno
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
| | - Yoshiyuki Hosokai
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
- Department of Radiological Sciences, School of Health Sciences, International University of Health and Welfare, Otawara City, Tochigi, Japan
| | - Yoshiyuki Nishio
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
- Department of Psychiatry and Neurology, Tokyo Metropolitan Matsuzawa Hospital, Setagaya-ku, Tokyo, Japan
| | - Toshiyuki Ishioka
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
- Department of Occupational Therapy, Saitama Prefectural University, Koshigaya City, Saitama, Japan
| | - Mika Otsuki
- Faculty of Health Sciences, Hokkaido University, Sapporo City, Hokkaido, Japan
| | - Atsushi Takeda
- Department of Neurology, National Hospital Organization Sendai-Nishitaga Hospital, Sendai city, Miyagi, Japan
- Department of Cognitive & Motor Aging, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
| | - Toru Baba
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
- Department of Neurology, National Hospital Organization Sendai-Nishitaga Hospital, Sendai city, Miyagi, Japan
| | - Masashi Aoki
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
| | - Takafumi Hasegawa
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
| | - Akio Kikuchi
- Department of Occupational Therapy, Yamagata Prefectural University of Health Sciences, Yamagata City, Yamagata, Japan
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
| | - Wataru Narita
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
| | - Etsuro Mori
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
- Department of Behavioral Neurology and Neuropsychiatry, Osaka University United Graduate School of Child Development, Suita City, Oosaka, Japan
| | - Kyoko Suzuki
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai City, Miyagi, Japan
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D'Antonio F, Boccia M, Di Vita A, Suppa A, Fabbrini A, Canevelli M, Caramia F, Fiorelli M, Guariglia C, Ferracuti S, de Lena C, Aarsland D, Ffytche D. Visual hallucinations in Lewy body disease: pathophysiological insights from phenomenology. J Neurol 2022; 269:3636-3652. [PMID: 35099586 PMCID: PMC9217885 DOI: 10.1007/s00415-022-10983-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 01/16/2022] [Accepted: 01/19/2022] [Indexed: 11/13/2022]
Abstract
Visual hallucinations (VH) in Lewy body disease (LBD) have a heterogenous phenomenology classified into minor phenomena (MVH) and complex hallucinations (CVH). Mechanisms underpinning VH and their temporal aspects are largely unknown. According to the hodotopic model, we investigated whether changes in distinct cognitive domains and neural networks in the hallucination trait underpin temporal aspects of MVH and CVH in the hallucination state. 35 LBD patients with VH underwent a complete neuropsychological evaluation and resting-state fMRI. North-East-Visual-Hallucinations-Interview was used to assess their typical VH content, duration, and frequency. We found that MVH was not associated with cognitive impairment, while CVH was associated with impairments in visuoperceptual processes, attention and visual abstract reasoning. In seed-to-seed functional connectivity (FC) analysis we identified functional couplings associated with MVH and CVH temporal severity (duration x frequency), duration and frequency. MVH severity was negatively associated with FC between early visual areas (EVA) and ventral-visual-stream regions, and negatively associated with FC between brainstem and EVA, which may be linked to LBD brainstem neuropathology. CVH duration was positively associated with FC between ventral-visual stream and salience network (SN). CVH frequency was negatively associated with FC between DMN and SN. Functional alterations in distinct visual and attentional networks and their dynamic interaction in trait LBD hallucinators are linked to both the phenomenology of state content and its temporal characteristics. Within a network, VH frequency and duration may be linked to different types of functional alterations: increased connectivity leading to sustained activity prolonging VH (duration) and decreased connectivity increasing dysregulated, spontaneous activity (frequency). These findings support the hodotopic hypothesis of VH and may reflect a link between VH phenomenology, LBD neuropathological progression and the involvement of specific neurotransmitter systems.
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Affiliation(s)
- Fabrizia D'Antonio
- Department of Human Neuroscience, "Sapienza" University of Rome, Viale dell'Università, 30 00165, Rome, Italy.
| | - Maddalena Boccia
- Department of Psychology, Sapienza University of Rome, Rome, Italy
- Cognitive and Motor Rehabilitation Unit, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Antonella Di Vita
- Department of Human Neuroscience, "Sapienza" University of Rome, Viale dell'Università, 30 00165, Rome, Italy
| | - Antonio Suppa
- Department of Human Neuroscience, "Sapienza" University of Rome, Viale dell'Università, 30 00165, Rome, Italy
- IRCCS Neuromed Institute, Pozzilli, IS, Italy
| | | | - Marco Canevelli
- Department of Human Neuroscience, "Sapienza" University of Rome, Viale dell'Università, 30 00165, Rome, Italy
| | - Francesca Caramia
- Department of Human Neuroscience, "Sapienza" University of Rome, Viale dell'Università, 30 00165, Rome, Italy
| | - Marco Fiorelli
- Department of Human Neuroscience, "Sapienza" University of Rome, Viale dell'Università, 30 00165, Rome, Italy
| | - Cecilia Guariglia
- Department of Psychology, Sapienza University of Rome, Rome, Italy
- Cognitive and Motor Rehabilitation Unit, IRCSS Fondazione Santa Lucia, Rome, Italy
| | - Stefano Ferracuti
- Department of Human Neuroscience, "Sapienza" University of Rome, Viale dell'Università, 30 00165, Rome, Italy
| | | | - Dag Aarsland
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Dominic Ffytche
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
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5
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Pareidolia in Parkinson's Disease and Multiple System Atrophy. PARKINSONS DISEASE 2021; 2021:2704755. [PMID: 34754412 PMCID: PMC8572613 DOI: 10.1155/2021/2704755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/08/2021] [Accepted: 10/20/2021] [Indexed: 11/18/2022]
Abstract
Pareidolia is a visual illusion of meaningful objects that arise from ambiguous forms embedded in visual scenes. Previous studies showed that pareidolias are frequently observed in patients with Parkinson's disease (PD) as well as dementia with Lewy bodies. However, whether pareidolias are useful for differentiating PD from other neurodegenerative parkinsonism disorders including multiple system atrophy (MSA) is unclear. The noise pareidolia test (NPT) was performed in 40 and 48 patients with PD and MSA, respectively. A receiver operating characteristic (ROC) curve analysis was used to evaluate sensitivity and specificity. Results of neuropsychological tests were also compared between patients with PD with and without pareidolias. Visual hallucinations were present in none of the subjects. Pareidolic response in the NPT was observed in 47.5% and 18.8% of patients with PD and MSA, respectively. The number of pareidolic responses in patients with PD was significantly larger compared with patients with MSA (P=0.001). ROC curve analyses showed the sensitivity and specificity at 33% and 98%, respectively. Among patients with PD, those with pareidolias demonstrated higher State-Trait Anxiety Inventory-state (P=0.044) and State-Trait Anxiety Inventory-trait (P=0.044) than those without pareidolias. Pareidolias can be found in patients with PD without visual hallucinations, and the pareidolia test may be a highly specific test for differentiating PD from MSA. Thus, anxiety may be associated with pareidolias in patients with PD.
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Marques A, Taylor NL, Roquet D, Beze S, Chassain C, Pereira B, O'Callaghan C, Lewis SJG, Durif F. Structural and Functional Correlates of Hallucinations and Illusions in Parkinson's Disease. JOURNAL OF PARKINSONS DISEASE 2021; 12:397-409. [PMID: 34744050 DOI: 10.3233/jpd-212838] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Visual illusions (VI) in Parkinson's disease (PD) are generally considered as an early feature of the psychosis spectrum leading to fully formed visual hallucinations (VH), although this sequential relationship has not been clearly demonstrated. OBJECTIVE We aimed to determine whether there are any overlapping, potentially graded patterns of structural and functional connectivity abnormalities in PD with VI and with VH. Such a finding would argue for a continuum between these entities, whereas distinct imaging features would suggest different neural underpinnings for the phenomena. METHODS In this case control study, we compared structural and resting state functional MRI brain patterns of PD patients with VH (PD-H, n = 20), with VI (PD-I, n = 19), and without VH or VI (PD-C, n = 23). RESULTS 1) PD-H had hypo-connectivity between the ILO and anterior cingulate precuneus and parahippocampal gyrus compared to PD-C and PD-I; 2) In contrast, PD-I had hyper-connectivity between the inferior frontal gyrus and the postcentral gyrus compared to PD-C and PD-H. Moreover, PD-I had higher levels of functional connectivity between the amygdala, hippocampus, insula, and fronto-temporal regions compared to PD-H, together with divergent patterns toward the cingulate. 3) Both PD-I and PD-H had functional hypo-connectivity between the lingual gyrus and the parahippocampal region vs. PD-C, and no significant grey matter volume differences was observed between PD-I and PD-H. CONCLUSION Distinct patterns of functional connectivity characterized VI and VH in PD, suggesting that these two perceptual experiences, while probably linked and driven by at least some similar mechanisms, could reflect differing neural dysfunction.
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Affiliation(s)
- Ana Marques
- Forefront Parkinson's Disease Research Clinic, Brain and Mind Center, School of Medical Sciences, University ofSydney, Camperdown, Sydney, Australia.,Université Clermont Auvergne, IGCNC, InstitutPascal, Clermont-Ferrand University Hospital, Neurology Department, Clermont-Ferrand, France
| | - Natasha L Taylor
- Forefront Parkinson's Disease Research Clinic, Brain and Mind Center, School of Medical Sciences, University ofSydney, Camperdown, Sydney, Australia
| | - Daniel Roquet
- Frontiers, Brain andMind Center, University of Sydney, Camperdown, Sydney, Australia
| | - Steven Beze
- Université Clermont Auvergne, IGCNC, InstitutPascal, Clermont-Ferrand University Hospital, Neurology Department, Clermont-Ferrand, France
| | - Carine Chassain
- Université Clermont Auvergne, IGCNC, InstitutPascal, Clermont-Ferrand University Hospital, NeuroradiologyDepartment, Clermont-Ferrand University Hospital, Clermont-Ferrand, France
| | - Bruno Pereira
- Clermont-Ferrand University Hospital, Biostatistics Department, Clermont-Ferrand, France
| | - Claire O'Callaghan
- Forefront Parkinson's Disease Research Clinic, Brain and Mind Center, School of Medical Sciences, University ofSydney, Camperdown, Sydney, Australia
| | - Simon J G Lewis
- Forefront Parkinson's Disease Research Clinic, Brain and Mind Center, School of Medical Sciences, University ofSydney, Camperdown, Sydney, Australia
| | - Franck Durif
- Université Clermont Auvergne, IGCNC, InstitutPascal, Clermont-Ferrand University Hospital, Neurology Department, Clermont-Ferrand, France
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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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8
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Event-Related Potentials Elicited by Face and Face Pareidolia in Parkinson's Disease. PARKINSONS DISEASE 2020; 2020:3107185. [PMID: 32318259 PMCID: PMC7150676 DOI: 10.1155/2020/3107185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 01/21/2020] [Accepted: 03/11/2020] [Indexed: 11/25/2022]
Abstract
Background Parkinson's disease is associated with impaired ability to recognize emotional facial expressions. In addition to a visual processing disorder, a visual recognition disorder may be involved in these patients. Pareidolia is a type of complex visual illusion that permits the interpretation of a vague stimulus as something known to the observer. Parkinson's patients experience pareidolic illusions. N170 and N250 waveforms are two event-related potentials (ERPs) involved in emotional facial expression recognition. Objective In this study, we investigated how Parkinson's patients process face and face-pareidolia stimuli at the neural level using N170, vertex positive potential (VPP), and N250 components of event-related potentials. Methods To examine the response of face and face-pareidolia processing in Parkinson's patients, we measured the N170, VPP, and N250 components of the event-related brain potentials in a group of 21 participants with Parkinson's disease and 26 control participants. Results We found that the latencies of N170 and VPP responses to both face and face-pareidolia stimuli were increased along with their amplitudes, and the amplitude of N250 responses decreased in Parkinson's patients compared to the control group. In both control and Parkinson's patients, face stimuli generated greater ERP amplitude and shorter latency in responses than did face-pareidolia stimuli. Conclusion The results of our study showed that ERPs associated with face and also face-pareidolia stimuli processing are changed in early-stage neurophysiological activity in the temporoparietal cortex of Parkinson's patients.
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Gang M, Baba T, Hosokai Y, Nishio Y, Kikuchi A, Hirayama K, Hasegawa T, Aoki M, Takeda A, Mori E, Suzuki K. Clinical and Cerebral Metabolic Changes in Parkinson's Disease With Basal Forebrain Atrophy. Mov Disord 2020; 35:825-832. [PMID: 31971293 DOI: 10.1002/mds.27988] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 12/11/2019] [Accepted: 01/08/2020] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Cholinergic dysfunction plays a key role in cognitive dysfunction in Parkinson's disease (PD). Recent studies revealed that atrophy in the nucleus basalis of Meynert (NBM), the largest cholinergic nucleus in the basal forebrain, heralds cognitive decline in PD. Despite clinical importance of NBM atrophy in PD, clinical and radiological correlates of NBM atrophy remains to be elucidated. OBJECTIVE We investigated the longitudinal changes in clinical and cerebral glucose metabolic characteristics in PD with atrophy in the NBM. METHODS We analyzed the 3-year longitudinal data of 56 PD patients who underwent motor, nonmotor, and imaging evaluations at baseline. The patients were classified into PD with and without NBM atrophy based on the results of magnetic resonance imaging volumetry. We compared clinical characteristics and cerebral glucose metabolic changes between PD with and without NBM atrophy. RESULTS At baseline, 20 patients and 36 patients were classified into PD with and without NBM atrophy groups, respectively. At follow-up, the data of the 14 PD patients in the NBM atrophy group and the 18 patients in the group without NBM atrophy completed full assessments and were available for the analysis. The PD with NBM atrophy group showed severe cognitive dysfunction and psychiatric symptoms both at baseline and follow-up. The NBM volume significantly correlated with motor and nonmotor functions. The PD with NBM atrophy showed significantly reduced metabolism in the parietal and occipital cortices both at baseline and follow-up. CONCLUSIONS Basal forebrain atrophy is a simple and sensible marker of faster disease progression and cortical hypometabolism in PD. © 2020 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Miyeong Gang
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Toru Baba
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan.,Department of Neurology, National Hospital Organization Sendai-Nishitaga Hospital, Sendai, Japan
| | - Yoshiyuki Hosokai
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan.,Department of Radiological Sciences, International University of Health and Welfare, Otawara, Japan
| | - Yoshiyuki Nishio
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan.,Department of Psychiatry and Neurology, Tokyo Metropolitan Matsuzawa Hospital, Tokyo, Japan
| | - Akio Kikuchi
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kazumi Hirayama
- Department of Occupational Therapy, Yamagata Prefectural University of Health Science, Yamagata, Japan
| | - Takafumi Hasegawa
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masashi Aoki
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Atsushi Takeda
- Department of Neurology, National Hospital Organization Sendai-Nishitaga Hospital, Sendai, Japan
| | - Etsuro Mori
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan.,Department of Behavioral Neurology and Neuropsychiatry, United Graduate School of Child Development, Osaka University, Suita, Japan
| | - Kyoko Suzuki
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan
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10
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Defining visual illusions in Parkinson's disease: Kinetopsia and object misidentification illusions. Parkinsonism Relat Disord 2018; 55:111-116. [DOI: 10.1016/j.parkreldis.2018.05.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/17/2018] [Accepted: 05/27/2018] [Indexed: 01/29/2023]
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11
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Nishio Y, Yokoi K, Uchiyama M, Mamiya Y, Watanabe H, Gang M, Baba T, Takeda A, Hirayama K, Mori E. Deconstructing psychosis and misperception symptoms in Parkinson's disease. J Neurol Neurosurg Psychiatry 2017; 88:722-729. [PMID: 28600444 DOI: 10.1136/jnnp-2017-315741] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/18/2017] [Accepted: 05/17/2017] [Indexed: 11/03/2022]
Abstract
OBJECTIVE Patients with Lewy body disease develop a variety of psychotic and misperception symptoms, including visual hallucinations and delusions, as well as 'minor hallucinations', that is, a sense of presence, passage hallucinations and visual illusions. Although these symptoms have been suggested to have common underlying mechanisms, the commonalities and differences among them have not been systematically investigated at the neural level. METHODS Sixty-seven patients with Parkinson's disease underwent neuropsychological and behavioural assessments, volumetric MRI and 18F-fluorodeoxyglucose-positron emission tomography (FDG-PET). A factor analysis was performed to discover correlations among psychotic and misperception symptoms, other behavioural symptoms and neuropsychological performances. Partial least-squares correlation analysis was used to investigate the relationship between these symptoms and the joint features of MRI and FDG-PET. RESULTS A sense of presence, passage hallucinations and visual illusions constituted a single behavioural factor (minor hallucinations/illusions). Visual hallucinations formed another behavioural factor along with delusions, depression and fluctuating cognition (psychosis/dysphoria). Three distinct brain-behaviour correlation patterns were identified: (1) posterior cortical atrophy/hypometabolism associated with minor hallucinations/illusions and visuospatial impairment; (2) upper brainstem and thalamic atrophy/hypometabolism associated with psychosis/dysphoria and (3) frontal cortical atrophy/hypometabolism associated with non-visual cognition. No significant differences in neuroimaging findings were identified between patients who had minor hallucinations/illusions alone and patients who also had visual hallucinations. CONCLUSIONS Our findings suggest that combined damage to the upper brainstem/thalamus and the posterior neocortex underlies both minor hallucinations/illusions and visual hallucinations and that the former pathology is more associated with visual hallucinations/frank psychosis and the latter is more associated with minor hallucinations/illusions.
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Affiliation(s)
- Yoshiyuki Nishio
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Kayoko Yokoi
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan.,Department of Occupational Therapy, Yamagata Prefectural University of Health Science, Yamagata, Japan
| | - Makoto Uchiyama
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan.,Department of Speech, Language and Hearing Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Yasuyuki Mamiya
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Hiroyuki Watanabe
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Miyeong Gang
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Toru Baba
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Atsushi Takeda
- Department of Neurology, Sendai Nishitaga National Hospital, Sendai, Japan
| | - Kazumi Hirayama
- Department of Occupational Therapy, Yamagata Prefectural University of Health Science, Yamagata, Japan
| | - Etsuro Mori
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
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12
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Özmüş G, Yerlikaya D, Gökçeoğlu A, Emek Savaş DD, Çakmur R, Dönmez Çolakoğlu B, Yener GG. Demonstration of Early Cognitive Impairment in Parkinson's Disease with Visual P300 Responses. Noro Psikiyatr Ars 2017; 54:21-27. [PMID: 28566954 DOI: 10.5152/npa.2016.12455] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 12/26/2015] [Indexed: 01/30/2023] Open
Abstract
INTRODUCTION Parkinson's disease (PD) is the second most common neurodegenerative disease after Alzheimer's disease. Cognitive changes in PD are less observable than motor symptoms; thus, research on cognitive processes, which are known to be impaired from the early stages of PD, is minimal. The purpose of this study is to research the brain dynamics of cognitively normal PD patients and healthy elderly controls using event-related potentials (ERPs) and to evaluate their relationships with neuropsychological tests. METHODS Eighteen cognitively normal PD patients and 18 age-, gender-, and education-matched healthy controls were included in the study. Detailed neuropsychological tests were applied to all participants. Electroencephalography (EEG) was performed according to the international 10-20 system, and a classical visual oddball paradigm was used in the experiments. ERP responses in the 0.5 to 25 Hz frequency range were examined. P300 amplitude and latency values were measured from the F3, Fz, F4, C3, Cz, C4, P3, Pz, P4, O1, Oz, and O2 electrode sites. In addition, the correlations between P300 responses and neuropsychological test scores were analyzed. RESULTS Significant differences were found between the P300 amplitudes of cognitively normal PD patients and healthy elderly controls [F(1,31)=9.265; p=0.005]. P300 amplitudes were significantly lower for PD patients at the F3, FZ, Cz, C4, Pz, and P4 electrode sites than for healthy elderly controls. Moderate correlations were found between Stroop test score and P4 amplitude, digit span forward and C3 and Pz amplitude, and digit span backward and O1 amplitude. CONCLUSION The major finding of this study was the detection of cognitive changes by electrophysiological methods in PD patients who were indicated to be cognitively normal by neuropsychological tests. These finding suggests that cognitive changes in PD patients, which are not yet reflected in neuropsychological tests, may be detected by electrophysiological methods in earlier stages.
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Affiliation(s)
- Gülin Özmüş
- Department of Neurosciences, Dokuz Eylül University Institute of Health Sciences, İzmir, Turkey
| | - Deniz Yerlikaya
- Department of Neurosciences, Dokuz Eylül University Institute of Health Sciences, İzmir, Turkey
| | - Arife Gökçeoğlu
- Department of Neurosciences, Dokuz Eylül University Institute of Health Sciences, İzmir, Turkey
| | | | - Raif Çakmur
- Department of Neurology, Dokuz Eylül University School of Medicine, İzmir, Turkey
| | | | - Görsev G Yener
- Department of Neurology, Dokuz Eylül University School of Medicine, İzmir, Turkey
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13
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Baba T, Hosokai Y, Nishio Y, Kikuchi A, Hirayama K, Suzuki K, Hasegawa T, Aoki M, Takeda A, Mori E. Longitudinal study of cognitive and cerebral metabolic changes in Parkinson's disease. J Neurol Sci 2017; 372:288-293. [DOI: 10.1016/j.jns.2016.11.068] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 10/29/2016] [Accepted: 11/28/2016] [Indexed: 10/20/2022]
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Luo C, Guo X, Song W, Chen Q, Yang J, Gong Q, Shang HF. The trajectory of disturbed resting-state cerebral function in Parkinson's disease at different Hoehn and Yahr stages. Hum Brain Mapp 2015; 36:3104-16. [PMID: 25959682 DOI: 10.1002/hbm.22831] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 04/08/2015] [Accepted: 04/24/2015] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE We aim to investigate the disturbance of neural network associated with the different clinical stages of Parkinson's disease (PD). METHOD We recruited 80 patients at different H&Y stages of PD (28 at H&Y stage I, 28 at H&Y stage II, 24 at H&Y stage III) and 30 normal controls. All participants underwent resting-state fMRI scans on a 3-T MR system. The amplitude of low-frequency fluctuation (ALFF) of blood oxygen level-dependent signals was used to characterize regional cerebral function. Functional integration across the brain regions was evaluated by a seed voxel correlation approach. RESULTS PD patients had decreased regional activities in left occipital and lingual regions; these regions show decreased functional connection pattern with temporal regions, which is deteriorating as H&Y stage ascending. In addition, PD patients, especially those at stage II, exhibit increased regional activity in the posterior regions of default mode network (DMN), increased anticorrelation between posterior cingulate cortex (PCC) and cortical regions outside DMN, and higher temporal coherence within DMN. Those indicate more highly functioned DMN in PD patients at stage II. CONCLUSIONS Our study demonstrated the trajectories of resting-state cerebral function disturbance in PD patients at different H&Y stages. Impairment in functional integration of occipital-temporal cortex might be a promising measurement to evaluate and potentially track functional substrates of disease evolution of PD.
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Affiliation(s)
- ChunYan Luo
- Department of Neurology, West China Hospital, SiChuan University, Chengdu Sichuan, China
| | - XiaoYan Guo
- Department of Neurology, West China Hospital, SiChuan University, Chengdu Sichuan, China
| | - Wei Song
- Department of Neurology, West China Hospital, SiChuan University, Chengdu Sichuan, China
| | - Qin Chen
- Department of Neurology, West China Hospital, SiChuan University, Chengdu Sichuan, China
| | - Jing Yang
- Department of Neurology, West China Hospital, SiChuan University, Chengdu Sichuan, China
| | - QiYong Gong
- Huaxi MR Research Center, Department of Radiology, West China Hospital, SiChuan University, Chengdu Sichuan, China
| | - Hui-Fang Shang
- Department of Neurology, West China Hospital, SiChuan University, Chengdu Sichuan, China
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Uchiyama M, Nishio Y, Yokoi K, Hosokai Y, Takeda A, Mori E. Pareidolia in Parkinson's disease without dementia: A positron emission tomography study. Parkinsonism Relat Disord 2015; 21:603-9. [PMID: 25864093 DOI: 10.1016/j.parkreldis.2015.03.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 03/05/2015] [Accepted: 03/22/2015] [Indexed: 01/08/2023]
Abstract
BACKGROUND Pareidolia, which is a particular type of complex visual illusion, has been reported to be a phenomenon analogous to visual hallucinations in patients with dementia with Lewy bodies. However, whether pareidolia is observed in Parkinson's disease (PD) or whether there are common underlying mechanisms of these two types of visual misperceptions remains to be elucidated. METHODS A test to evoke pareidolia, the Pareidolia test, was administered to 53 patients with PD without dementia and 24 healthy controls. The regional cerebral metabolic rate of glucose was measured using 18F-fluorodeoxyglucose positron emission tomography in the PD patients. RESULTS PD patients without dementia produced a greater number of pareidolic illusions compared with the controls. Pareidolia was observed in all of the patients having visual hallucinations as well as a subset of those without visual hallucinations. The number of pareidolic illusions was correlated with hypometabolism in the bilateral temporal, parietal and occipital cortices. The index of visual hallucinations was correlated with hypometabolism in the left parietal cortex. A region associated with both pareidolia and visual hallucinations was found in the left parietal lobe. CONCLUSIONS Our study suggests that PD patients without dementia experience pareidolia more frequently than healthy controls and that posterior cortical dysfunction could be a common neural mechanism of pareidolia and visual hallucinations. Pareidolia could represent subclinical hallucinations or a predisposition to visual hallucinations in Lewy body disease.
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Affiliation(s)
- Makoto Uchiyama
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan; Department of Speech, Language and Hearing Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Yoshiyuki Nishio
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan.
| | - Kayoko Yokoi
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Yoshiyuki Hosokai
- Department of Diagnostic Image Analysis, Tohoku University School of Medicine, Sendai, Japan
| | - Atsushi Takeda
- Department of Neurology, Sendai Nishitaga National Hospital, Sendai, Japan
| | - Etsuro Mori
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
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16
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Shoji Y, Nishio Y, Baba T, Uchiyama M, Yokoi K, Ishioka T, Hosokai Y, Hirayama K, Fukuda H, Aoki M, Hasegawa T, Takeda A, Mori E. Neural substrates of cognitive subtypes in Parkinson's disease: a 3-year longitudinal study. PLoS One 2014; 9:e110547. [PMID: 25330390 PMCID: PMC4203806 DOI: 10.1371/journal.pone.0110547] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 09/15/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The neuropsychological features and neuropathological progression patterns associated with rapidly evolving cognitive decline or dementia in Parkinson's disease (PD) remain to be elucidated. METHODS Fifty-three PD patients without dementia were recruited to participate in a 3-year longitudinal cohort study. The patients were grouped according to the Clinical Dementia Rating (CDR). Group-wise comparisons were made with regard to demographic characteristics, motor symptoms, neuropsychological performances and 18F-fluorodeoxyglucose positron emission tomography. RESULTS Patients who had memory-plus cognitive impairment (patients whose CDR was 0 at baseline and 0.5 in memory and other domains at follow-up, and those whose baseline CDR was 0.5 in memory and other domains) exhibited higher age at onset, visuoperceptual impairment, non-tremor-dominant motor disturbance, rapid symptomatic progression and posterior neocortical hypometabolism. In patients who were cognitively unimpaired and those who had memory-dominant cognitive impairment (patients whose CDR was 0 at baseline and 0.5 only in memory domain at follow-up, and those whose baseline CDR was 0.5 only in memory domain), the posterior neocortex was relatively unaffected until a later stage of the disease. CONCLUSIONS These results suggest that visuoperceptual impairment and the early involvement of the posterior neocortex may be risk factors for rapid symptomatic progression and dementia in PD.
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Affiliation(s)
- Yumiko Shoji
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Yoshiyuki Nishio
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
- * E-mail:
| | - Toru Baba
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Makoto Uchiyama
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
- Department of Speech, Language and Hearing Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Kayoko Yokoi
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
| | - Toshiyuki Ishioka
- Department of Occupational Therapy, Saitama Prefectural University, Koshigaya, Japan
| | - Yoshiyuki Hosokai
- Department of Diagnostic Image Analysis, Tohoku University School of Medicine, Sendai, Japan
| | - Kazumi Hirayama
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
- Department of Occupational Therapy, Yamagata Prefectural University of Health Science, Yamagata, Japan
| | - Hiroshi Fukuda
- Department of Radiology and Nuclear Medicine, Institute of Development, Aging, and Cancer, Tohoku University, Sendai, Japan
| | - Masashi Aoki
- Department of Neurology, Tohoku University School of Medicine, Sendai, Japan
| | - Takafumi Hasegawa
- Department of Neurology, Tohoku University School of Medicine, Sendai, Japan
| | - Atsushi Takeda
- Department of Neurology, Sendai Nishitaga Hospital, Sendai, Japan
| | - Etsuro Mori
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University School of Medicine, Sendai, Japan
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18
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Mori E. [Neuropsychology of dementia]. Rinsho Shinkeigaku 2014; 54:1095-1097. [PMID: 25672718 DOI: 10.5692/clinicalneurol.54.1095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
As cognitive dysfunction is the core symptom of dementia, the assessment of it is essential for the clinical practice. The role of "neuropsychology" is none other than analysis and interpretation of the central symptoms of brain damaged including dementing illnesses. "Neuropsychology" in this sense does not refer only to the neuropsychological tests that psychologists employ, but certainly implies mental status examination as a part of the neurological examination, which enables us to make focal diagnosis and differential diagnosis, to evaluate the disability, to predict the problems in living, and to measure disease severity, rate of progression, and response to treatment are essential. This paper, citing aphasia due to degenerative diseases, behavioral neurological signs, and the relationship between visuoperceptive impairments and visual hallucinations as examples, discussed the clinical roles and scientific potentials of neuropsychology in dementia.
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Affiliation(s)
- Etsuro Mori
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University, Graduate School of Medicine
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Baba T, Kikuchi A, Hirayama K, Nishio Y, Hosokai Y, Kanno S, Hasegawa T, Sugeno N, Konno M, Suzuki K, Takahashi S, Fukuda H, Aoki M, Itoyama Y, Mori E, Takeda A. Severe olfactory dysfunction is a prodromal symptom of dementia associated with Parkinson's disease: a 3 year longitudinal study. ACTA ACUST UNITED AC 2012; 135:161-9. [PMID: 22287381 DOI: 10.1093/brain/awr321] [Citation(s) in RCA: 196] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Dementia is one of the most debilitating symptoms of Parkinson's disease. A recent longitudinal study suggests that up to 80% of patients with Parkinson's disease will eventually develop dementia. Despite its clinical importance, the development of dementia is still difficult to predict at early stages. We previously identified olfactory dysfunction as one of the most important indicators of cortical hypometabolism in Parkinson's disease. In this study, we investigated the possible associations between olfactory dysfunction and the risk of developing dementia within a 3-year observation period. Forty-four patients with Parkinson's disease without dementia underwent the odour stick identification test for Japanese, memory and visuoperceptual assessments, (18)F-fluorodeoxyglucose positron emission tomography scans and magnetic resonance imaging scans at baseline and 3 years later. A subgroup of patients with Parkinson's disease who exhibited severe hyposmia at baseline showed more pronounced cognitive decline at the follow-up survey. By the end of the study, 10 of 44 patients with Parkinson's disease had developed dementia, all of whom had severe hyposmia at baseline. The multivariate logistic analysis identified severe hyposmia and visuoperceptual impairment as independent risk factors for subsequent dementia within 3 years. The patients with severe hyposmia had an 18.7-fold increase in their risk of dementia for each 1 SD (2.8) decrease in the score of odour stick identification test for Japanese. We also found an association between severe hyposmia and a characteristic distribution of cerebral metabolic decline, which was identical to that of dementia associated with Parkinson's disease. Furthermore, volumetric magnetic resonance imaging analyses demonstrated close relationships between olfactory dysfunction and the atrophy of focal brain structures, including the amygdala and other limbic structures. Together, our findings suggest that brain regions related to olfactory function are closely associated with cognitive decline and that severe hyposmia is a prominent clinical feature that predicts the subsequent development of Parkinson's disease dementia.
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Affiliation(s)
- Toru Baba
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai 980-8574, Japan
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Sawada Y, Nishio Y, Suzuki K, Hirayama K, Takeda A, Hosokai Y, Ishioka T, Itoyama Y, Takahashi S, Fukuda H, Mori E. Attentional set-shifting deficit in Parkinson's disease is associated with prefrontal dysfunction: an FDG-PET study. PLoS One 2012; 7:e38498. [PMID: 22685575 PMCID: PMC3369918 DOI: 10.1371/journal.pone.0038498] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 05/07/2012] [Indexed: 11/17/2022] Open
Abstract
The attentional set-shifting deficit that has been observed in Parkinson's disease (PD) has long been considered neuropsychological evidence of the involvement of meso-prefrontal and prefrontal-striatal circuits in cognitive flexibility. However, recent studies have suggested that non-dopaminergic, posterior cortical pathologies may also contribute to this deficit. Although several neuroimaging studies have addressed this issue, the results of these studies were confounded by the use of tasks that required other cognitive processes in addition to set-shifting, such as rule learning and working memory. In this study, we attempted to identify the neural correlates of the attentional set-shifting deficit in PD using a compound letter task and 18F-fluoro-deoxy-glucose (FDG) positron emission tomography during rest. Shift cost, which is a measure of attentional set-shifting ability, was significantly correlated with hypometabolism in the right dorsolateral prefrontal cortex, including the putative human frontal eye field. Our results provide direct evidence that dysfunction in the dorsolateral prefrontal cortex makes a primary contribution to the attentional set-shifting deficit that has been observed in PD patients.
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Affiliation(s)
- Yoichi Sawada
- Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan
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Shine JM, Halliday GH, Carlos M, Naismith SL, Lewis SJ. Investigating visual misperceptions in Parkinson's disease: A novel behavioral paradigm. Mov Disord 2012; 27:500-5. [DOI: 10.1002/mds.24900] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 11/29/2011] [Accepted: 12/07/2011] [Indexed: 11/12/2022] Open
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