نتایج جستجو برای: aqueduct velocity
تعداد نتایج: 142310 فیلتر نتایج به سال:
Preservation of residual hearing after cochlear implantation is now considered an important goal of surgery. However, studies indicate an average post-operative hearing loss of around 20 dB at low frequencies. One factor which may contribute to post-operative hearing loss, but which has received little attention in the literature to date, is the increased stiffness of the round window, due to t...
IMPORTANCE Approximately one-half of all subjects with unilateral or bilateral hearing loss with enlargement of the vestibular aqueduct (EVA) will have SLC26A4 gene mutations. The number (0, 1, or 2) of mutant alleles of SLC26A4 detected in an individual subject with EVA is each associated with a distinct combination of diagnostic and prognostic information as well as probability of recurrence ...
PURPOSE Previous computational fluid dynamics (CFD) studies have demonstrated that the Chiari malformation is associated with abnormal cerebrospinal fluid (CSF) flow in the cervical part of the subarachnoid space (SAS), but the flow in the SAS of the posterior cranial fossa has received little attention. This study extends previous modelling efforts by including the cerebellomedullary cistern, ...
When Dahl salt-resistant (DR) rats are given mild post-deoxycorticosterone acetate (DOCA) hypertension, they will have, within 8 weeks, a 53% mortality on a high NaCl diet, without a rise of blood pressure. Forty-two DR rats were given DOCA in silicone (250 mg/kg) and 1% NaCl to drink. After 4 weeks, the DOCA and 1% saline were removed and replaced with a low NaCl diet and tap water. One week l...
lifeline for supplying the brain with essential nutrients and growth factors throughout development and into adulthood. At the same time, the brain exercises constant control to ensure that the flow of CSF is homeostatic. CSF is secreted by the choroid plexus and moves rostrocaudally through the ventricles and into the subarachnoid space before being drained into the venous circulation (80). Fa...
A 21-year-old man with tuberous sclerosis presented with a 2-day history of progressive nausea, vomiting, ataxia, headache, and mild spasticity. The patient was known to have a large giant-cell astrocytoma occupying the third ventricle, and he had previously had ventriculoperitoneal shunts placed into both lateral ventricles . A multiecho 20FT MR scan was obtained on a 1.5-T unit' with TEs of 2...
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