Basal Ganglia Herniation into the Fourth Ventricle
نویسندگان
چکیده
منابع مشابه
The "keyhole": a sign of herniation of a trapped fourth ventricle and other posterior fossa cysts.
When a cystic structure in the posterior fossa increases in size, the accompanying increase in pressure may cause it to herniate upward through the tentorial hiatus. In our experience this happens most commonly with a dilated trapped fourth ventricle secondary to infection or intraventricular hemorrhage. However, herniation of an arachnoid cyst or a Dandy-Walker malformation through the tentori...
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Sydenham's chorea (SC) occurs weeks or months after Group A streptococcal infection, and is characterized by involuntary, purposeless movements of the limbs, in addition to behavioural alteration. There is a body of evidence which suggests that SC is an immune-mediated brain disorder with regional localization to the basal ganglia. Recent reports have suggested that the spectrum of post-strepto...
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Progress in our understanding of the mechanisms underlying the cardinal motor abnormalities of Parkinson’s disease (PD), in particular akinesia and bradykinesia and their treatment, has been remarkable. Notable accomplishments include insights into the functional organization of the basal ganglia and their place in the motor system as components of a family of parallel cortico-subcortical circu...
متن کاملThe basal ganglia
The basal ganglia, said Kinnear-Wilson in the 1920s, have all the clarity of a dark basement. And so it has remained for the better part of a century. There are now major new ideas about what these deeplying structures in the forebrain may be doing. Lesions of the basal ganglia lead to devastating motor disorders, including Parkinson’s disease and Huntington’s disease. In addition, the basal ga...
متن کاملThe Basal Ganglia
That the basal ganglia are related to the control of movement has been known for a long time; diseases affecting primarily the basal ganglia lead to characteristic disturbances of movement and of resting muscle tone. Improved methods for tracing fiber connections have shown, however, that the main efferent connections of the basal ganglia do not descend to motor nuclei in the brain stem and spi...
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ژورنال
عنوان ژورنال: Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques
سال: 1997
ISSN: 0317-1671,2057-0155
DOI: 10.1017/s0317167100021119