The Experts below are selected from a list of 48 Experts worldwide ranked by ideXlab platform
Dirk Petersen - One of the best experts on this subject based on the ideXlab platform.
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Dysarthria in bilateral thalamic infarction A case study
Journal of Neurology, 1993Co-Authors: Hermann Ackermann, Wolfram Ziegler, Dirk PetersenAbstract:A patient suffering from bilateral thalamic infarction in the region supplied by the Paramedian Arteries sparing the internal capsules underwent acoustic analysis of sentence utterances. The results were compared with the findings obtained in parkinsonian subjects, in patients with upper motor neuron lesions, and in normal subjects. Acoustic measurements revealed increased pitch, monotonous speech, rough voice quality, and normal speech tempo concomitant with articulatory impreciseness in terms of incomplete closure productions. This constellation resembled parkinsonian dysarthria. Damage to the thalamic projection area of the pallidal efferents, therefore, seems to be the most probable cause of the patient's speech disorders. In parkinsonian subjects stereotactical lesions of this structure ameliorate rigor, but not akinesia. Thus, our patient's speech deficits, and by analogy the corresponding parkinsonian dysarthric disturbances, may be considered akinetic signs.
Hermann Ackermann - One of the best experts on this subject based on the ideXlab platform.
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Dysarthria in bilateral thalamic infarction A case study
Journal of Neurology, 1993Co-Authors: Hermann Ackermann, Wolfram Ziegler, Dirk PetersenAbstract:A patient suffering from bilateral thalamic infarction in the region supplied by the Paramedian Arteries sparing the internal capsules underwent acoustic analysis of sentence utterances. The results were compared with the findings obtained in parkinsonian subjects, in patients with upper motor neuron lesions, and in normal subjects. Acoustic measurements revealed increased pitch, monotonous speech, rough voice quality, and normal speech tempo concomitant with articulatory impreciseness in terms of incomplete closure productions. This constellation resembled parkinsonian dysarthria. Damage to the thalamic projection area of the pallidal efferents, therefore, seems to be the most probable cause of the patient's speech disorders. In parkinsonian subjects stereotactical lesions of this structure ameliorate rigor, but not akinesia. Thus, our patient's speech deficits, and by analogy the corresponding parkinsonian dysarthric disturbances, may be considered akinetic signs.
Wolfram Ziegler - One of the best experts on this subject based on the ideXlab platform.
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Dysarthria in bilateral thalamic infarction A case study
Journal of Neurology, 1993Co-Authors: Hermann Ackermann, Wolfram Ziegler, Dirk PetersenAbstract:A patient suffering from bilateral thalamic infarction in the region supplied by the Paramedian Arteries sparing the internal capsules underwent acoustic analysis of sentence utterances. The results were compared with the findings obtained in parkinsonian subjects, in patients with upper motor neuron lesions, and in normal subjects. Acoustic measurements revealed increased pitch, monotonous speech, rough voice quality, and normal speech tempo concomitant with articulatory impreciseness in terms of incomplete closure productions. This constellation resembled parkinsonian dysarthria. Damage to the thalamic projection area of the pallidal efferents, therefore, seems to be the most probable cause of the patient's speech disorders. In parkinsonian subjects stereotactical lesions of this structure ameliorate rigor, but not akinesia. Thus, our patient's speech deficits, and by analogy the corresponding parkinsonian dysarthric disturbances, may be considered akinetic signs.
Yi Dong - One of the best experts on this subject based on the ideXlab platform.
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Bilateral thalamic infarction and DSA demonstrated AOP after thrombosis.
Acta radiologica short reports, 2012Co-Authors: Qiang Dong, Linxin Li, Yi DongAbstract:Bilateral Paramedian thalamic stroke is a special ischemic pattern that results from occlusion of the artery of Percheron (AOP), a rare anatomic variant of the Paramedian Arteries. We report a case of bilateral thalamic infarctions, with a dramatic improvement after thrombolysis. DSA demonstrated recanalization of AOP with possible unreported variation.
Francisco A Gutierrez-manjarrez - One of the best experts on this subject based on the ideXlab platform.
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Bilateral Thalamic Ischemic Stroke Secondary to Occlusion of the Artery of Percheron.
Cureus, 2018Co-Authors: Miguel García-grimshaw, Mariana Peschard-franco, Francisco A Gutierrez-manjarrezAbstract:: The occlusion of the artery of Percheron (AOP) is a rare condition that causes bilateral thalamic ischemic stroke with or without midbrain involvement. It happens as a result of an anatomical variant of the diencephalic irrigation, in which the thalamic Paramedian Arteries arise from a common trunk from the posterior cerebral artery (PCA), which generates a clinical syndrome characterized by bilateral vertical gaze palsy, memory impairment and hypersomnia. In this case, we report a 62-year-old woman admitted to the emergency room with altered mental status, mainly somnolence. On physical examination, she was somnolent, apathetic and with no motor deficit. Magnetic resonance imaging (MRI) of the brain demonstrated bilateral thalamic hyperintensities and midbrain involvement in diffusion-weighted imaging (DWI) and T2 sequences, suggesting occlusion of the AOP. Bilateral thalamic infarction due to this anatomical variant is an entity with a low prevalence, and its diagnosis can be delayed because of the wide spectrum of clinical signs.
