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Cerebral white matter undergoes various changes with normal aging. This study investigated the association between age, gender, and the global and regional fractional anisotropy (FA) and mean diffusivity (MD) in 145 adults (30 to 80 years old) using diffusion tensor magnetic resonance imaging. We studied sixteen regions of interest in both hemispheres to(More)
Diffusion tensor imaging (DTI) has already proven to be a valuable tool when investigating both global and regional microstructural white matter (WM) brain changes in the human aging process. Although subject to many criticisms, voxel-based analysis is currently one of the most common and preferred approaches in such DTI aging studies. In this context,(More)
This paper presents a broadband very low 3<sup>rd</sup> -order intermodulation inductor-less low-noise amplifier (LNA) implemented in 0.13 mum CMOS technology. The LNA consists of a common-gate input stage for wideband impedance matching, followed by two parallel common source amplifiers which perform noise and distortion cancellation. Third-order(More)
This paper presents a wideband receiver front-end implemented in 0.13 &#x00B5;m CMOS technology. The front-end consists of a low-noise amplifier (LNA), a quadrature mixer, and a frequency divider. Multi-gated transistors have been used to enable linearity tuning. The circuit employs no inductors and operates from 0.3 &#x2212; 2.6 GHz with a tunable baseband(More)
OBJECTIVE To study the effect of 0.9 Hz repetitive transcranial magnetic stimulation (rTMS) of the lateral premotor cortex on neuronal activity in cortical motor areas during simple motor tasks. METHODS In 8 subjects, electroencephalogram (EEG) and electromyogram (EMG) were simultaneously recorded during voluntary contractions of the thumb before and(More)
This is a case report of a 32-year-old woman with chronic severe anemia who developed headaches and seizures 5 days after receiving a blood transfusion of eight units (1600 ml) of packed red blood cells. Magnetic resonance imaging indicated vasogenic edematous lesions bilaterally over the occipital lobes that were consistent with reversible posterior(More)
This paper presents an integrated quadrature demodulator with on-chip frequency divider implemented in a 0.13 mum CMOS technology. The mixer consists of a transconductance stage, a passive current switching stage, and an operational amplifier output stage. A complementary input architecture has been used to increase the transconductance for a given bias(More)
BACKGROUND Double-filtration plasmapheresis (DFP) removes high-molecular-weight molecules semiselectively, thereby minimizing albumin loss, but with subsequent need for fluid substitution. The purpose of this study was to establish the overall incidence of complications during DFP and to analyze the possible contributory factors. STUDY DESIGN AND METHODS(More)
The estrogen receptor alpha gene (ESR1) is an important mediator of the atheroprotective effect of estrogen on the vasculature system. We examined the potential associations between common single nucleotide polymorphism (SNP) variants of ESR1 and intima-media thickness (IMT) in carotid arteries, a strong predictor of cardiovascular disease (CVD). A total of(More)