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Dysarthria and lacunar stroke: pathophysiologic aspects. 1996

P P Urban, and H C Hopf, and P G Zorowka, and S Fleischer, and J Andreas
Department of Neurology, University of Mainz, Germany.

We investigated the supranuclear tracts involved in speech production in 8 patients with dysarthria associated with a single lacunar stroke. Magnetic resonance imaging revealed the lesion site in 7 out of 8 patients. We tested corticobulbar tract function using transcranial magnetic stimulation and demonstrated impairment of the corticolingual projections in all the patients and in 5 patients impairment of the corticofacial projections. Sensory function in the oral cavity was impaired in 1 out of 8 patients. 99mTc hexamethyl-propylene amine oxime-single-photon emission computerized tomography (HMPAO-SPECT) imaging, performed in 5 patients, showed cerebellar diaschisis in 1, suggesting additional cerebropontocerebellar tract impairment. Dysarthria observed in the 2 patients with impaired sensation in the oral cavity or with cerebellar diaschisis did not differ from the dysarthria found in the other patients. We conclude that interruption of the corticolingual pathways to the tongue is crucial in the pathogenesis of dysarthria following extracerebellar lacunar stroke.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D002531 Cerebellum The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills. Cerebella,Corpus Cerebelli,Parencephalon,Cerebellums,Parencephalons
D002561 Cerebrovascular Disorders A spectrum of pathological conditions of impaired blood flow in the brain. They can involve vessels (ARTERIES or VEINS) in the CEREBRUM, the CEREBELLUM, and the BRAIN STEM. Major categories include INTRACRANIAL ARTERIOVENOUS MALFORMATIONS; BRAIN ISCHEMIA; CEREBRAL HEMORRHAGE; and others. Brain Vascular Disorders,Intracranial Vascular Disorders,Vascular Diseases, Intracranial,Cerebrovascular Diseases,Cerebrovascular Insufficiency,Cerebrovascular Occlusion,Brain Vascular Disorder,Cerebrovascular Disease,Cerebrovascular Disorder,Cerebrovascular Insufficiencies,Cerebrovascular Occlusions,Disease, Cerebrovascular,Diseases, Cerebrovascular,Insufficiencies, Cerebrovascular,Insufficiency, Cerebrovascular,Intracranial Vascular Disease,Intracranial Vascular Diseases,Intracranial Vascular Disorder,Occlusion, Cerebrovascular,Occlusions, Cerebrovascular,Vascular Disease, Intracranial,Vascular Disorder, Brain,Vascular Disorder, Intracranial,Vascular Disorders, Brain,Vascular Disorders, Intracranial
D004401 Dysarthria Disorders of speech articulation caused by imperfect coordination of pharynx, larynx, tongue, or face muscles. This may result from CRANIAL NERVE DISEASES; NEUROMUSCULAR DISEASES; CEREBELLAR DISEASES; BASAL GANGLIA DISEASES; BRAIN STEM diseases; or diseases of the corticobulbar tracts (see PYRAMIDAL TRACTS). The cortical language centers are intact in this condition. (From Adams et al., Principles of Neurology, 6th ed, p489) Hyperkinetic Dysarthria,Hypokinetic Dysarthria,Scanning Speech,Dysarthosis,Dysarthria, Flaccid,Dysarthria, Guttural,Dysarthria, Mixed,Dysarthria, Scanning,Dysarthria, Spastic,Dysarthoses,Dysarthria, Hyperkinetic,Dysarthria, Hypokinetic,Dysarthrias,Dysarthrias, Flaccid,Dysarthrias, Guttural,Dysarthrias, Hyperkinetic,Dysarthrias, Hypokinetic,Dysarthrias, Mixed,Dysarthrias, Scanning,Dysarthrias, Spastic,Flaccid Dysarthria,Flaccid Dysarthrias,Guttural Dysarthria,Guttural Dysarthrias,Hyperkinetic Dysarthrias,Hypokinetic Dysarthrias,Mixed Dysarthria,Mixed Dysarthrias,Scanning Dysarthria,Scanning Dysarthrias,Scanning Speechs,Spastic Dysarthria,Spastic Dysarthrias,Speechs, Scanning
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D013060 Speech Communication through a system of conventional vocal symbols. Public Speaking,Speaking, Public

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