The ability for visual prostheses to preferentially activate functionally-distinct retinal ganglion cells (RGCs) is important for improving visual perception. This study investigates the use of high frequency stimulation (HFS) to elicit RGC activation, using a closed-loop algorithm to search for optimal stimulation parameters for preferential ON and OFF RGC activation, resembling natural physio...

introduction : cerebral autoregulation (ca) and mean cerebral blood flow velocity in males and females are still under controversy. the present study was scheduled to address the effect of sex on these parameters. materials and methods : the present study was interventional and performed on 30 healthy volunteers (15 males aging from 20-30 yrs and mean age of 23.9±3 years old and 15 females agin...

Type 2 receptors for vascular endothelial growth factor are believed to be involved in the pathophysiology of ovarian hyperstimulation syndrome (OHSS). The objective of this study was to examine the preventive effects of cabergoline on OHSS and its complications. The study is a non randomized clinical trial conducted in 2006-2008 on 75 patients, which were at risk of OHSS and underwent assisted...

Abstract Deep brain stimulation has become a last resource procedure for severe, chronic and refractory OCD. However, the is highly invasive its efficacy must be balanced against risks it may entail. In addition, there are number of procedure-related issues that influence DBS, such as target stimulation, parameters to selected, presence comorbidities exclusion criteria, or in different OCD subt...

The dielectric properties of cartilage are essential for the development reliable numerical models electrical stimulation devices intended regeneration cartilage. They are, however, not widely known. To determine cartilage, we propose a workflow that incorporates detailed tissue-specific 3D geometries based on fluorescent microscopic images and describes how different parameters can affect resu...

the provision of an adequate quantity of cells with proper function and purity is one of the main challenges of tissue engineering studies. stem cells, with their self-renewal and differentiation capacity, are considered one of the main cell sources in the field of tissue engineering. previously, the use of chemical factors seemed to be the only possible way for stem cell differentiation. howev...