Medicine and Health Sciences Commons^™

Influence Of Foot Position On Lower Extremity Muscle Activation, Erin L. Wessman

Physical Therapy Scholarly Projects

With sports participation be it from children, teenagers, or adults; injuries will occur. In 2008-2009 an increase in high school sports participation was at an all-time high increasing to just above 7.5 million. Within this population, knee injuries ranked 3rd, with anterior cruciate ligament (ACL) injuries ranking 4th among all knee injuries. The purpose of this study was to compare muscle activation of six lower extremity muscles in five different foot positions during a single-leg squat in attempts to associate a certain foot position with an increase/decrease in muscle activation, which could then be proposed as a risk factor for …

Muscle Activity In Lower Extremity During Single-Leg Squat: Role Of Supination And Pronation, Brett J. Debele

Physical Therapy Scholarly Projects

Introduction: Literature has consistently reported a high prevalence of ACL injury rates. A correlation between excessive subtalar joint pronation and ACL injury rates has been noted but research into plausible reasons for this relationship is limited. The purpose of this study was to establish potential cause-and-effect relationships between foot position and ACL injury risk.

Methods: This study used single leg squats with simulated foot positions and examined resulting knee joint forces from motion and lower extremity muscle activation patterns that may cause ACL injury risk. Methods: This study recruited male and female participants aged 18 to 30 from campus at …

Sarcopenia And Aging: Skeletal Muscle Fiber Type Composition Of The Long-Lived Ames Dwarf Mouse Compared To Its Wild-Type Counterpart, Cory Leier

Physical Therapy Scholarly Projects

Skeletal muscle fiber type composition has not been studied in the long-lived Ames dwarf mouse when compared to its wild-type counterpart. Hindlimb soleus skeletal muscle from two 3-month old dwarf and two 3-month old wild-type mice was analyzed for muscle fiber size, proportion of type I (slow-twitch) and type II (fast-twitch) muscle fibers, myonuclei content per muscle fiber, and total cross sectional area of the muscle. Results revealed a significant difference in muscle fiber size (t(58)=-9.71, p

Prosthetic Training Following A Transfemoral Amputation: A Case Report, Jonathan Beck

Physical Therapy Scholarly Projects

Background and Purpose: There has been an increase in amputations since the start of the Iraq/Afghanistan war, but thousands of Americans have a limb amputated each year due to peripheral vascular disease, diabetes, or infections. New technology in the field of prosthetics, especially prosthetic knees, has helped improve these individuals’ function. The most recent advancement in prosthetic knees is the C-leg, a micro-processor-controlled knee; however, a wide variety of prosthetic knees are available. Therefore, it is critical to select the right prosthetic knee to meet each individual’s needs and goals.

Case Description: The patient was a 58-year-old gentleman who underwent …

Muscle Fiber Type Characterization In The Ames Dwarf Mouse: A Model Of Delayed Aging, Angela M. Williams

Physical Therapy Scholarly Projects

Introduction: Normal muscle wasting due to aging, known as sarcopenia, has many implications in society, especially with a growing population of elderly people. In this study, muscle fiber size and count, nuclei count, and ratio of fast- to slow-twitch fibers was studied between Ames dwarf mice (df), an established model of aging, and wild-type mice (WT) to learn more about the mechanisms of aging, specifically related to skeletal muscle.

Methods: Four hind limb muscles were harvested from two Ames dwarf mice and two wildtype mice, sliced cross-sectionally and mounted on slides. After mounting, the slides were stained three different ways …