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Previous studies suggested that gamma oscillations in the brain are associated with higher order cognitive function including selective visual attention, motor task planning, sensory perception, working memory and dreaming REM sleep. These oscillations are mainly observed in cortical regions and also occur in neocortical and subcortical areas and the hippocampus. In this paper, we investigate the...
It has been widely proposed that, higher cognitive functions such as learning, memory, attention and exploratory behavior could be represented in the CA1 region of the hippocampal area of the brain by a distributed neuronal network synchronization on an oscillatory mode as the gamma-band or 40 Hz (30-80 Hz) oscillations. In this paper, we have studied the effect of nicotine on the dynamics of the...
The aim of this project is to improve the detection of coronary occlusions using an approach based on the recording and analysis of isolated diastolic heart sounds associated with turbulent blood flow in occluded coronary arteries. The nonlinear dynamic analysis method based on approximate entropy has been proposed for the analysis of diastolic heart sounds. A commercially available electronic stethoscope...
Numerous studies based on the spectral analysis of diastolic sounds showed an increase in the high frequency portion of the spectrum for patients with coronary artery disease (CAD) compared with normal patients. The overall goal of this study is to detect the presence of coronary artery disease in patients using a noninvasive and inexpensive approach. A commercially available electronic stethoscope...
In this study, we examine EMGdi complexity before and after general (muscimol) inhibition of respiratory neurons within the rostral ventral medulla (RVM). We inserted a microdialysis guide tube into the RVM region, allowing us to dialyze muscimol on a daily basis during experiments. Animals were studied using the technique of barometric plethysmography, allowing us to measure ventilation without restraint...
Sounds created by a controlled occlusion in the femoral artery of dogs were detected and analyzed by using the fast Fourier transform and autoregressive methods after adaptive filtering. The femoral vessel size and flow were chosen to approximate coronary artery conditions in patients. This work was done to confirm the hypothesis that coronary stenosis produces a detachable auditory correlate. Results...
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