NL Greenberg

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In a stationary target acquisition task, both 65-year-old and 20-year-old adults exhibited a negatively accelerated curvilinear relationship between the spatial variability of submovement endpoints and average submovement velocity. For high velocities, the variability was greater for the older adults. This elevated motor noise is considered a primary cause(More)
Older (n = 12) and younger (n = 12) golfers attempted to hit a golf ball into a target net a short distance away. An accelerometer attached to the back of the clubhead measured the applied force. In contrast to the more typical finding of slower perceptual-motor performance by older adults, older golfers reached their peak downswing force earlier in the(More)
Ss performed the same M-shaped manual movement pattern on repeated trials using a visual display of instantaneous error. With practice, Ss' effective time delays were diminished by increased anticipation as evidenced by an increased correlation of their movement patterns with the input velocity. However, younger adults had lower error scores, performed(More)
Advanced post processing of the standard acquisitions of echocardiographic data (i.e. 3 parallel short-axis views and 3 rotational long axis views) results in a total of 72 time-varying traces of segmental linear strains and 18 traces of segmental rotational data. If one separates the signal into endo, mid, and epicardial myocardial layers, a staggering 246(More)
Visualization of Real-Time 3D Echocardiography (RT3DE) is currently limited by the bi-dimensional nature of conventional monitors. The objective of this study is to implement and evaluate an optimized image-processing algorithm to generate multi-view auto-stereoscopic images. Custom-made software rendered test images (n=5) on a 9-view auto-stereoscopic 3D(More)
Digital echocardiography has altered clinical workflow and improved patient care. While network performance is critical for data transfers, bandwidth tradeoffs might be acceptable to allow access to data outside of the echo laboratory. In this study, we examined the ability to use portable ultrasound in a wireless environment to provide real-time echo(More)
Real-Time 3D Echocardiography is currently limited by factors including accessibility of analysis software to quickly and accurately determine ventricular volumes for assessment of myocardial function. The goal of this study was to examine the capabilities of a 3D system to acquire full 4D echocardiographic datasets and evaluate the ability to obtain both(More)
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