Troy Blackburn

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Many Virtual Environment (VE) systems require a walking interface to travel through the virtual world. Real Walking – the preferred interface – is only feasible if the virtual world is smaller than the real-world tracked space. When the to-be-explored virtual world is larger than the real-world tracked space, Walking-In-Place (WIP) systems are frequently(More)
This study compared the biomechanics of jump landing tasks used in ACL research. Twenty-seven female subjects performed a drop landing (DL), a drop landing with a vertical jump (DVJ), and a forward jump landing with a vertical jump (FVJ). We hypothesized that as one progressed from the drop landing through the forward-vertical jump that the kinematic and(More)
Knee valgus is a potential risk factor for lower extremity (LE) injuries. Clinical movement screenings and passive range of motion (PROM) measurements may help identify neuromuscular patterns, which contribute to knee valgus. The purpose of this study was to compare LE muscle activation and PROM between subjects who display visual medial knee displacement(More)
Extended use of knee sleeves in populations at risk for knee osteoarthritis progression has shown functional and quality of life benefits; however, additional comprehensive kinematic and kinetic analyses are needed to determine possible physical mechanisms of these benefits which may be due to the sleeve's ability to enhance knee proprioception. A novel(More)
BACKGROUND AND PURPOSE Children with shunted hydrocephalus have been undergoing surveillance neuroimaging, generally in the form of head CT, for evaluation of ventricular size. As the life expectancy of these children has improved due to better shunt technology and medical care, risks related to the ionizing radiation incurred during multiple head CT(More)
This is the official guideline endorsed by the specialty associations involved in the care of head and neck cancer patients in the UK. It provides recommendations on the work up and management of lateral skull base cancer based on the existing evidence base for this rare condition. Recommendations • All patients with more than one of: chronic otalgia,(More)
Electromyographic (EMG) amplitude and mechanical tension are directly related during isometric contraction. Maximal voluntary isometric contractions are typically elicited through two different procedures; resisting a load, which is eccentric in nature, and contracting against an immovable object, which is concentric in nature. A wealth of literature exists(More)
Previous studies have found that anterior cruciate ligament reconstructed (ACL-R), individuals demonstrate altered corticospinal excitability, quadriceps activation, and vertical ground reaction force (vGRF) loading rates during walking gait. Altered corticospinal excitability may influence the onset of quadriceps activity in preparation for heel strike,(More)
YUKIKO MAKIHARA: Functional Implications of H-reflex Modulation and Modification in Human Soleus, Medial Gastrocnemius, and Lateral Gastrocnemius Muscles (Under the direction of Richard L. Segal) Sensorimotor integration of the central nervous system (CNS) plays an important role in motor control. In order to evaluate this highly complicated phenomenon, the(More)
BACKGROUND Hip flexor tightness is theorized to alter antagonist muscle function through reciprocal inhibition and synergistic dominance mechanisms. Synergistic dominance may result in altered movement patterns and increased risk of lower extremity injury. HYPOTHESIS/PURPOSE To compare hip extensor muscle activation, internal hip and knee extension(More)