Acquisition of Surface EMG Using Flexible and Low-Profile Electrodes for Lower Extremity Neuroprosthetic Control.

For persons with lower extremity (LE) amputation, acquisition of surface electromyography (sEMG) from within the prosthetic socket remains a significant challenge due to the dynamic loads experienced during the gait cycle. However, these signals are critical for both understanding the clinical effects of LE amputation and determining the desired control trajectories of active LE prostheses. Current solutions for collecting within-socket sEMG are generally (i) incompatible with a subject's prescribed prosthetic socket and liners, (ii) uncomfortable, and (iii) expensive.

Flexible Dry Electrodes for EMG Acquisition within Lower Extremity Prosthetic Sockets.

Acquisition of surface electromyography (sEMG) from a person with an amputated lower extremity (LE) during prosthesis-assisted walking remains a significant challenge due to the dynamic nature of the gait cycle. Current solutions to sEMG-based neural control of active LE prostheses involve a combination of customized electrodes, prosthetic sockets, and liners. These technologies are generally: (i) incompatible with a subject's existing prosthetic socket and liners; (ii) uncomfortable to use; and (iii) expensive.

An Ankle-Foot Prosthesis for Rock Climbing Augmentation.

This research presents the design and preliminary evaluation of an electromyographically (EMG) controlled 2-degree-of-freedom (DOF) ankle-foot prosthesis designed to enhance rock climbing ability in persons with transtibial amputation. The prosthesis comprises motorized ankle and subtalar joints, and is capable of emulating some key biomechanical behaviors exhibited by the ankle-foot complex during rock climbing maneuvers. The free space motion of the device is volitionally controlled via input from EMG surface electrodes embedded in a custom silicone liner worn on the residual limb.

Intensity of acute aerobic exercise but not aerobic fitness impacts on corticospinal excitability.

Aerobic exercise (AE) modulates cortical excitability. It can alter both corticospinal excitability and intra-cortical networks, which has implications for its use as a tool to facilitate processes such as motor learning, where increased levels of excitability are conducive to the induction of neural plasticity. Little is known about how different intensities of AE modulate cortical excitability or how individual-level characteristics impact on it.

Helmet use is associated with a decrease in intracranial hemorrhage following all-terrain vehicle crashes.

Background: With the recent increase in size and horsepower of all-terrain vehicles (ATVs), it is imperative that preventable injuries be identified to protect the large population using ATVs. Currently, many states have no laws regulating ATV or helmet use. By identifying preventable injuries, the legislature can design appropriate laws to protect both children and adults.

Suspected bile duct injuries and appropriate early referral can reduce chances of litigation.

Bile duct injury following laparoscopic cholecystectomy is one of the most feared complications related to performing a cholecystectomy. Early identification and repair can be life saving for patients with bile duct injuries. Since the early 1990s, laparoscopic cholecystecomy (LC) has replaced open cholecystectomy as the preferred treatment of symptomatic cholethiasis, biliary dyskinesia, and cholecystitis.

The role of laparoscopy in small bowel obstruction after previous laparotomy for trauma: an initial report.

Presently, there are no guidelines to help predict which patients are more likely to have successful laparoscopic adhesiolysis. We attempt to define which preoperative characteristics of trauma patients who later develop small bowel obstruction are most amenable to a laparoscopic operation. We did a retrospective review of all patients with small bowel obstruction after previous laparotomy for trauma.

Differential expression of prognostic factors and effect on survival in young (< or =40) breast cancer patients: a case-control study.

The belief that young women develop more aggressive forms of breast cancer than other women is controversial. The purpose of this study was to determine if women 40 years of age and under with breast cancer have more negative prognostic indicators and a higher 5-year mortality than those women over 40 years of age. From January 1998-December 2002, all women with breast cancer were identified from our tumor registry.