Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Comparative Study
Wall shear stress in major cerebral arteries as a function of age and gender--a study of 301 healthy volunteers.
The hemodynamic force of wall shear stress (WSS) has demonstrated a critical role in atherogenesis. ⋯ The overall decline in MWSS observed with age may be due to a decrease in flow. However, the marked drop in MWSS between the 48-57 and 58-67 age groups corresponded with an increase in diameter and systolic blood pressure rather than a significant drop in flow.
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Reversible corpus callosum splenial (CCS) lesions are rare findings and usually detected incidentally. We presented a case of 15-year-old boy with a diagnoses of nephrotic syndrome. ⋯ Follow-up MRI 3 weeks later showed complete resolution of the lesion. It was probably result of focal intramyelinic edema due to excytotoxic mechanisms and/or arginine-vasopressin release.
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We investigated the relationship between transcranial Doppler (TCD) pulsatility index (PI) and central aortic pressure by measurement of the aortic augmentation index (AIx). ⋯ TCD PI was significantly related with central aortic pressure, especially PP. The PI in the MCA and BA is closely associated with the pulsatile component of BP in the systemic circulation.
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The clinical significance of vertebral artery hypoplasia (VAH) and the possible pathomechanism of ischemic stroke in patients with VAH are still not completely clear. ⋯ In patients with VAH, the combination of several pathomechanisms of ischemic stroke and the contribution of several risk factors can cause the clinical manifestation of PCS.
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The aim of this study is to explore the possible changed cerebral white matter regions in patients with temporal lobe epilepsy (TLE) using diffusion tensor imaging (DTI) and tract-based spatial statistics (TBSS). ⋯ TLE is associated with widespread abnormalities in cerebral white matter tracts and these changes may have important clinical consequences.