In a pre vi ous study, it was noted that in some cases when com pres sive strains greater than about 5% were ap plied to tu mors re moved from the breast, there was an abrupt and ir re vers ible change in the tis sue stiff ness. The data from that study were fur ther an a lyzed and in fil trat ing ductal car ci no mas with and with out lob u lar fea tures were se lected for ad di tional test in...

This is the second part of a two-part review on motion problems after ligament injuries to the knee. The first part, published in the September/October 2001 issue, discussed normal and abnormal knee motion, terminology, risk factors, and pathoanatomy. The purpose of this article is to review current concepts on prevention and treatment of motion problems, summarizing the recent and pertinent st...

Primary total knee arthroplasty (TKA) is a reliable procedure with reproducible long-term results. Nevertheless, there are conditions related to the type of patient or local conditions of the knee that can make it a difficult procedure. The most common scenarios that make it difficult are discussed in this review. These include patients with many previous operations and incisions, and those wit...

Six hemiparetic stroke patients presenting with a stiff-legged gait underwent a motor branch block of rectus femoris (RF). A gait analysis, including synchronous kinematic, dynamic, energetic recordings was performed before and after motor branch block of RF. The electrical activity of RF, Vastus Medialis, Vastus Lateralis, Vastus Intermedius was also recorded. Before nerve block, the sagittal ...

Stiff-knee gait is a troublesome movement disorder among children with cerebral palsy (CP), where peak swing phase knee flexion is diminished due to over-activity of the rectus femoris muscle. A common treatment for stiff-knee gait, rectus femoris transfer surgery, moves the muscle's distal tendon from the patella to the sartorius insertion on the tibia. As a biarticular muscle, rectus femoris ...

1 Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA Stiff knee gait is often seen in patients with upper motor neuron injury. It describes a gait pattern with relative loss of sagittal knee motion. This aberrant gait interferes with foot clearance during swing, often leading to inefficient compensatory mechanisms and ambulatory dysfunction. At our institution, we h...