Frank B Underwood

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Rehabilitative Ultrasound Imaging (RUSI) has been validated as a noninvasive method to measure activation of selected muscles. The purpose of this study was to determine the relationship between muscle thickness change, as measured by ultrasonography, and electromyography (EMG) activity of the lumbar multifidus (LM) muscle in normal subjects. Bipolar fine(More)
Previous studies have demonstrated an increased energy expenditure with novel tasks. With practice, the energy cost decreases as the body more efficiently recruits motor units. This study examined whether one becomes more efficient after repeated bouts of backward walking. The subjects were 7 healthy subjects between the ages of 23 and 49 years. A backward(More)
BACKGROUND AND PURPOSE The purpose of this study was to measure the test-retest reliability of the ulnar F-wave minimum latency (Fmin) in normal adults. A reliable Fmin measure allows clinicians to ascribe changes in latency to true changes in a subject and not merely random daily variation. SUBJECTS AND METHODS Fmin in the Abductor Digiti Minimi muscle(More)
The use of back belts in industry has increased despite the lack of scientific evidence supporting their efficacy. The purpose of this study was to investigate the effect of a semi-rigid lumbosacral orthosis (SRLSO) on oxygen consumption during 6-min submaximal repetitive lifting bouts of 10 kg at a lifting frequency of 20 repetitions min-1. Fifteen healthy(More)
Rehabilitative ultrasound imaging (RUSI) is considered a valid method to measure muscle activation in key spinal muscles in asymptomatic subjects. Research measuring muscle activation with RUSI in painful subjects is limited. The aim of this study was to determine if changes in muscle activation from experimentally induced pain can be measured by RUSI. Six(More)
Lumbar musculature plays an important role in stabilization during functional movements such as walking, bending and overhead activities. Current research has focused on the lumbar multifidus (LM) muscle to determine if altered activity of the LM may contribute to low back pain (LBP). Therefore, the purpose of this study was to determine whether(More)
BACKGROUND AND PURPOSE The purpose of this study was to compare the effects of two commonly used stimulating electrode placements on F-wave latency. SUBJECTS Fifty healthy subjects aged 20 to 47 years were tested. METHODS F-waves were obtained from median and ulnar nerves bilaterally. A total of 200 nerves were tested. RESULTS A paired t-test(More)
[Greathouse DG, Underwood FB, Tuttle P: Roth technique—A new approach for measuring sensory neural conduction in the median and ulnar nerves: Suggestion from the field. This article describes a technique to determine orthodromic sensory neural conduction of the median and ulnar nerves. The Roth technique is an accurate, yet time-conserving, method to(More)
The opinions or assertions contained herein are the private views of the authors and are not to be construed as official or as reflecting the views of the Department of the Army or the Department of Defense. At the time this study was performed, LTs Ferguson, Blackley, Knight, and Sutlive were students in the US. Army-Baylor University Graduate Program in(More)
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