Microrollers flow uphill as granular media.

Pour sand into a container and only the grains near the top surface move. The collective motion associated with the translational and rotational energy of the grains in a thin flowing layer is quickly dissipated as friction through multibody interactions. Alternatively, consider what will happen to a bed of particles if one applies a torque to each individual particle.

Dynamic Leap and Balance Test: Ability to Discriminate Balance Deficits in Individuals With Chronic Ankle Instability.

Context: The Dynamic Leap Balance Test (DLBT) is a new dynamic balance task that requires serial changes in base of support with alternating limb support and recovery of dynamic stability, as compared with the Y modification of the Star Excursion Balance Test (Y-SEBT), which assesses dynamic stability over an unchanging base of support.

Objectives: To assess the dynamic balance performance in 2 different types of dynamic balance tasks, the DLBT and the SEBT, in subjects with unilateral chronic ankle instability (CAI) when compared with matched controls. The authors hypothesized that the DLBT score would significantly differ between the CAI involved and uninvolved limbs (contralateral and healthy matched) and demonstrate a modest (r = .

The Comparative Effects of Ankle Bracing on Functional Performance.

Ankle sprains represent a common musculoskeletal injury that clinicians are tasked with preventing and treating. Because of the prevalence of this injury, ankle braces have been designed to prophylactically protect the joint and reduce the incidence of repetitive sprains. Although an abundance of literature exists focusing on the efficacy of braces in preventing ankle sprains in young, healthy, and physically active populations, there is a scarcity of evidence specific to the impact of these apparatuses on functional performance; therefore, the purpose of this critically appraised topic (CAT) is to investigate the effects of ankle braces on functional performance measures in such individuals.

Standing flexion deficits predict self-reported outcomes in women after ipsilateral hamstring anterior cruciate ligament reconstruction.

Purpose: To profile the standing flexion angle and its association with subjective outcomes in ipsilateral hamstring tendon autograft anterior cruciate ligament-reconstructed patients. A secondary aim was to describe prone position-measured hamstring strength as a predictor of flexion angle.

Methods: Fifteen women (mean age, 20.

Can the Communion of Saints Help the Search for Justice in Dying well (Enough), "In Abraham's Arms, Where Lazarus is Poor no Longer"?

How can we practice dying in community? What communal practices nourish positive acts that make dying well (enough)-more than prudent caution in avoiding causing death (killing)? What part of our common ecclesial life as Catholics enables us to accompany dying persons as a gracious return to God? We are twice haunted: most first world deaths result from foreseen end-stage illnesses; mortality is less feared than burdensomeness for caregivers from vulnerable dependence. Of those who die in the hospital, many deaths result from decisions to withhold and withdraw treatments. From ten kinds of desolation about dying, ten parallel consolations are discerned in hopes and outcomes-based best practices.

Injury/illness physician referral profile from a youth university-sponsored summer sport camp program.

Participation at university-sponsored summer sport camps is popular among youth athletes; however, there is a dearth of information to describe the injuries/illnesses experienced by camp participants. Data from a university-sponsored sport camp program from 2008 to 2011 were accessed retrospectively. The sport camp program had approximately 80 camps for 28 sports over 12 weeks annually.

Proton therapy radiation pneumonitis local dose-response in esophagus cancer patients.

Purpose: This study quantifies pulmonary radiation toxicity in patients who received proton therapy for esophagus cancer.

Materials/methods: We retrospectively studied 100 esophagus cancer patients treated with proton therapy. The linearity of the enhanced FDG uptake vs.

Premature knee osteoarthritis after anterior cruciate ligament reconstruction dependent on autograft.

Anterior cruciate ligament (ACL) reconstructions are common postoperative orthopedic conditions encountered by sports rehabilitation specialists. The rationale for reconstructing the ACL is to restore mechanical stability of the knee joint and prevent associated musculoskeletal sequelae. The selection of available autogenous graft options for surgical interventions continues to be a controversial topic in orthopedic sports medicine.

Systematic review of efficacy for manual lymphatic drainage techniques in sports medicine and rehabilitation: an evidence-based practice approach.

Manual therapists question integrating manual lymphatic drainage techniques (MLDTs) into conventional treatments for athletic injuries due to the scarcity of literature concerning musculoskeletal applications and established orthopaedic clinical practice guidelines. The purpose of this systematic review is to provide manual therapy clinicians with pertinent information regarding progression of MLDTs as well as to critique the evidence for efficacy of this method in sports medicine. We surveyed English-language publications from 1998 to 2008 by searching PubMed, PEDro, CINAHL, the Cochrane Library, and SPORTDiscus databases using the terms lymphatic system, lymph drainage, lymphatic therapy, manual lymph drainage, and lymphatic pump techniques.

The relationship between grading and instrumented measurements of anterior knee joint laxity.

Context: The relationship between clinical judgments of anterior knee laxity and instrumented measurement of anterior tibial translation is unclear.

Objective: To examine the relationship between certified athletic trainers'grading of anterior knee laxity and instrumented measurements of anterior tibial translation.

Design: Randomized, blinded, clinical assessment.

The Effects of Fatigue and Chronic Ankle Instability on Dynamic Postural Control.

OBJECTIVE: Deficits in static postural control related to chronic ankle instability (CAI) and fatigue have been investigated separately, but little evidence links these factors to performance of dynamic postural control. Our purpose was to investigate the effects of fatigue and CAI on performance measures of a dynamic postural-control task, the Star Excursion Balance Test. DESIGN AND SETTING: For each of the 3 designated reaching directions, 4 separate 5 (condition) x 2 (time) x 2 (side) analyses of variance with a between factor of group (CAI, healthy) were calculated for normalized reach distance and maximal ankle-dorsiflexion, knee-flexion, and hip-flexion angles.

Cryotherapy, Sensation, and Isometric-Force Variability.

OBJECTIVE: To determine the changes in sensation of pressure, 2-point discrimination, and submaximal isometric-force production variability due to cryotherapy. DESIGN AND SETTING: Sensation was assessed using a 2 x 2 x 2 x 3 repeated-measures factorial design, with treatment (ice immersion or control), limb (right or left), digit (finger or thumb), and sensation test time (baseline, posttreatment, or postisometric-force trials) as independent variables. Dependent variables were changes in sensation of pressure and 2-point discrimination.