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Ultrasound biomicroscopic (UBM) images can be used, in vivo, to monitor changes within the skeletal muscle of small animals such as the changes due to degeneration and regeneration processes that are associated with variations in the image echo intensity. The present work accounted the follow-up of alterations in image brightness (echo intensity) during the regeneration process of a muscle submitted...
<para> In our comment some essential issues concerning determination of arterial input function (AIF), cardiac and respiratory related motion artifacts, contrast agent application and compartmental model fitting done by Cao <emphasis emphasistype="boldital">et al.</emphasis>, 2009 are discussed. </para>
The delivery of high frequency alternating currents (HFAC) to peripheral nerves has been shown to produce a rapid and reversible nerve conduction block at the site of the electrode, and holds therapeutic promise for diseases associated with undesired or pathological neural activity. It has been known since 1939 that the configuration of an electrode used for nerve block can impact the quality of the...
High frequency alternating current (HFAC) waveforms reversibly block conduction in mammalian peripheral nerves. The initiation of the HFAC produces an onset response in the nerve before complete block occurs. An amplitude ramp, starting from zero amplitude, is ineffective in eliminating this onset response. In fact, it makes the onset worse. We postulated that initiating the ramp from a non-zero amplitude...
The clinical use of high frequency alternating current (HFAC) to block nerve conduction in peripheral nerves is limited due to the large volley of nerve activity generated at the initiation of HFAC. This ldquoonset responserdquo must be characterized in order to determine if it is possible to eliminate it. In this study, preliminary experiments were conducted in an in-vivo animal model using counted...
A report is given of the development of a computer-aided-instruction (CAI) system for laboratory practical exercises for students of a first course in physiology. Muscle contraction recording from relatively small experimental animals, such as frogs and rats, is a problem when one tries to introduce CAI into laboratory experiments. An appropriate converter is needed for small mechanical movement registration...
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