Visual–spatial disembedding in Parkinson's disease

Crucian, Gregory P.; Armaghani, Sheyan J.; Armaghani, Avan; Foster, Paul S.; Burks, David W.; Skoblar, Barry M.; Drago, Valeria; Heilman, Kenneth M.

doi:10.1080/13803390902902441

Cited by 26 publications

(17 citation statements)

References 78 publications

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“…Nevertheless, these studies do not give detailed information about global visuoperceptive or visuospatial abilities of their PD groups. These basic abilities are quite often impaired in patients and may influence discrimination abilities (Crucian & Okun, ). This potentially explains the differences between our results and theirs.…”

Section: Discussionmentioning

confidence: 99%

Discrimination and categorization of emotional facial expressions and faces in Parkinson's disease

Alonso-Recio

Martı́n

Rubio

et al. 2013

Journal of Neuropsychology

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Our objective was to compare the ability to discriminate and categorize emotional facial expressions (EFEs) and facial identity characteristics (age and/or gender) in a group of 53 individuals with Parkinson's disease (PD) and another group of 53 healthy subjects. On the one hand, by means of discrimination and identification tasks, we compared two stages in the visual recognition process that could be selectively affected in individuals with PD. On the other hand, facial expression versus gender and age comparison permits us to contrast whether the emotional or non-emotional content influences the configural perception of faces. In Experiment I, we did not find differences between groups, either with facial expression or age, in discrimination tasks. Conversely, in Experiment II, we found differences between the groups, but only in the EFE identification task. Taken together, our results indicate that configural perception of faces does not seem to be globally impaired in PD. However, this ability is selectively altered when the categorization of emotional faces is required. A deeper assessment of the PD group indicated that decline in facial expression categorization is more evident in a subgroup of patients with higher global impairment (motor and cognitive). Taken together, these results suggest that the problems found in facial expression recognition may be associated with the progressive neuronal loss in frontostriatal and mesolimbic circuits, which characterizes PD.

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Section: Discussionmentioning

confidence: 99%

Discrimination and categorization of emotional facial expressions and faces in Parkinson's disease

Alonso-Recio

Martı́n

Rubio

et al. 2013

Journal of Neuropsychology

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“…For example, reflexive saccades have been found to be normal in less severe affected PD patients in medical ‘OFF' situation [55]. Crucian et al [56] described visual scanning in PD patients to be independent not only of disease duration and severity but also of ‘ON' or ‘OFF' medication status. Levodopa challenge induced even deterioration of oculomotor function despite improvement of motor control in some PD patients.…”

Section: Discussionmentioning

confidence: 99%

Visual Attention and Saccadic Oculomotor Control in Parkinson's Disease

et al. 2015

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Background: In patients with Parkinson's disease (PD) we aimed at differentiating the relation between selective visual attention, deficits of programming and dynamics of saccadic eye movements while searching for a target and hand-reaction time as well as hand-movement time. Visual attention is crucial for concentrating selectively on one aspect of the visual field while ignoring other aspects. Eye movements are anatomically and functionally related to mechanisms of visual attention. Saccadic dysfunction might confound selective visual attention in PD. Methods: We studied visual selective attention in 22 medicated PD patients (clinical ON status, mild to moderate disease severity) and 22 age matched controls. We looked for possible interferences through oculomotor deficits. Two tasks were compared: free viewing of photographs and time optimal visual search of a hidden target. Visual search times (VST), task related dynamics of saccades, and hand-reaction and hand-movement times were analyzed. Results: In the free viewing task mild to moderately affected PD patients did not differ statistically from healthy subjects with respect to saccade dynamics. However, patients differed significantly from healthy subjects in the time optimal visual search task with 25% lower rates of successful searches. Hand movement reaction time did not differ in both groups, whereas hand movement execution time was significantly prolonged in PD patients. Conclusion: Saccadic oculomotor control and hand movement reaction times were intact, whereas in our less severely affected treated PD patients, visual selective attention was not. The highly reduced successful search rate might be related to disturbed programming and delayed execution of saccades during time optimal visual search due to decreased execution of serial-order sequential generation of saccades.

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“…Mit zunehmendem Lebensalter fahren Parkinson-Patienten im Fahrsimulator [5], in kombinierten Prüfungen aus klinischem Test und aktiver Fahrprüfung [11] und bei Fahrprüfungen auf der Straße schlechter [4]. Sehstörungen sind häufig bei M. Parkinson [16] und beinhalten eine mit dem Alter und der Krankheitsschwere zunehmende Verminderung von Sehschärfe und Kontrastsehen [16], eine parallel mit kognitiven Einschränkungen zunehmend reduzierte visuelle Explorationsfähigkeit [17,18], Doppelbilder [19] und auch unabhängig von Medikation, Krankheitsdauer oder Schwere vorliegende und regelhaft nicht wahrgenommene visuell-räumliche Defizite [20][21][22]. Das verminderte Kontrastsehen scheint sogar einen größeren negativen Einfluss auf die Fahrfähigkeit zu haben als eine reduzierte Sehschärfe [7,15], was für Fahrten in der Dämmerung oder bei Dunkelheit relevant ist [12].…”

Section: Patienteneigenschaftenunclassified

Fahreignung bei Morbus Parkinson

Buhmann

Vesper

Oelsner

2017

Fortschr Neurol Psychiatr

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About 60 % of all patients with Parkinson's disease (PD) and about 50 % of PD patients with deep brain stimulation (DBS) in possession of a driving license are active car-drivers. Parkinson patients, however, often display physical and/or psychological weaknesses that can lead to loss of or reduced driving ability. Driving capability can also be affected by Parkinson medication. The attending physician is therefore obliged to advise his patients regarding their ability to be in command of a vehicle. This however can prove difficult in practice. On the one hand, there is no standardised predictive test battery to evaluate driving capability and on the other, levels of motor impairment do not correlate sufficiently with driving skills. This article will provide an overview of motor and non-motor symptoms that affect general and/or Parkinson's disease-related driving capability and which criteria demonstrate a temporary or permanent inability to drive. Furthermore, we will highlight which neuropsychological investigations are beneficial and how PD patients with DBS should be evaluated and subsequently advised regarding their driving fitness.

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Visual–spatial disembedding in Parkinson's disease

Cited by 26 publications

References 78 publications

Discrimination and categorization of emotional facial expressions and faces in Parkinson's disease

Discrimination and categorization of emotional facial expressions and faces in Parkinson's disease

Visual Attention and Saccadic Oculomotor Control in Parkinson's Disease

Fahreignung bei Morbus Parkinson

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