An augmented reality dual-task intervention improves postural stability in individuals with Parkinson's disease.

Background: The Dual-task Augmented Reality Treatment (DART) trial recently established that dual-task training (DTT) delivered by a physical therapist or the augmented reality DART platform was effective in improving spatiotemporal gait parameters under single- and dual-task conditions in individuals with Parkinson's disease (PD). Data regarding postural stability were not reported in the primary outcome manuscript.

Objective: The aim of this secondary analysis was to compare the effects of a Traditional DTT intervention delivered by a physical therapist and DTT delivered by the DART platform on postural stability, functional mobility, and turning in individuals with PD.

The Microsoft HoloLens 2 Provides Accurate Biomechanical Measures of Performance During Military-Relevant Activities in Healthy Adults.

Introduction: Augmented reality systems, like the HoloLens 2 (HL2), have the potential to provide accurate assessments of mild traumatic brain injury (mTBI) symptoms in military personnel by simulating complex military scenarios while objectively measuring the user's movements with embedded motion sensors. The aim of this project was to determine if biomechanical measures of marching and squatting, derived from the HL2 motion sensors, were statistically equivalent, within 5%, to metrics derived from the gold-standard three-dimensional motion capture (MoCap) system.

Materials And Methods: Sixty-four adults (18-45 years; 34 males) completed a squatting and a marching task under single- (motor) and dual-task (motor + cognitive) conditions.

A Randomized Clinical Trial to Evaluate a Digital Therapeutic to Enhance Gait Function in Individuals With Parkinson's Disease.

Background: Postural instability and gait dysfunction (PIGD) is a cardinal symptom of Parkinson's disease (PD) and is exacerbated under dual-task conditions. Dual-task training (DTT), enhances gait performance, however it is time and cost intensive. Digitizing DTT via the Dual-task Augmented Reality Treatment (DART) platform can expand the availability of an effective intervention to address PIGD.

The Microsoft HoloLens 2 Provides Accurate Measures of Gait, Turning, and Functional Mobility in Healthy Adults.

Augmented-reality (AR) headsets, such as the Microsoft HoloLens 2 (HL2), have the potential to be the next generation of wearable technology as they provide interactive digital stimuli in the context of ecologically-valid daily activities while containing inertial measurement units (IMUs) to objectively quantify the movements of the user. A necessary precursor to the widespread utilization of the HL2 in the fields of movement science and rehabilitation is the rigorous validation of its capacity to generate biomechanical outcomes comparable to gold standard outcomes. This project sought to determine equivalency of kinematic outcomes characterizing lower-extremity function derived from the HL2 and three-dimensional (3D) motion capture systems (MoCap).

Parkinson's gait kinematics deteriorates across multiple cognitive domains under dual-task paradigms.

Objective: The symptoms of Parkinson's disease (PD) in many circumstances lead to gait dysfunction which contribute to decreased mobility, reduced quality of life, and increased risk of falling. Dual-task conditions have been shown to amplify gait dysfunction from a spatiotemporal parameter standpoint; however, less is known regarding gait joint kinematics under dual-task conditions in PD, specifically across multiple cognitive domains. The purpose of this project was to systematically characterize lower extremity joint kinematics in individuals with mild-moderate PD under dual-task paradigms across multiple cognitive domains.

Computer-Assisted Immersive Visual Rehabilitation in Argus II Retinal Prosthesis Recipients.

Purpose: The field of retinal prostheses is expanding. However, the best approach to training and assessing the functional benefit of postoperative vision has not been established. The purpose of this single-center prospective interventional case series was to evaluate the feasibility and effectiveness of using the Computer Assisted Rehabilitation Environment (CAREN) system as a visual rehabilitation tool in Argus II patients.

Improvements in temporal and postural aspects of gait vary following single- and multi-modal training in individuals with Parkinson's disease.

Introduction: Gait deteriorates under dual task conditions in individuals with Parkinson's disease (PD). Therapeutic interventions have the potential to improve dual task performance, although it remains unclear how training affects gait performance under varying cognitive domains. The primary aim of this trial was to determine the effect of an 8-week single- or multi-modal gait and cognitive training intervention on dual task performance across cognitive domains in individuals with PD.

The Two Minute Walk Test Overground and on a Self-Paced Treadmill Detects Dual Task Deficits in Individuals With Parkinson's Disease.

The aim of this project was to 1) evaluate the potential of the Two Minute Walk Test (2MWT) to detect declines in gait velocity under dual task conditions, and 2) compare gait velocity overground and on a self-paced treadmill in Parkinson's disease (PD). Twenty-three individuals with PD completed the 2MWT under single and dual task (serial 7s) conditions overground and on a self-paced treadmill. There was a significant decrease in gait velocity from single to dual task conditions overground (1.

Dual-task Interference Disrupts Parkinson's Gait Across Multiple Cognitive Domains.

Gait dysfunction, a hallmark of Parkinson's disease, contributes to a relatively high incidence of falling. Gait function is further diminished during the performance of a motor-cognitive task (i.e.

Altered kinematics of arm swing in Parkinson's disease patients indicates declines in gait under dual-task conditions.

Objective: Declines in simultaneous performance of a cognitive and motor task are present in Parkinson's disease due to compromised basal ganglia function related to information processing. The aim of this project was to determine if biomechanical measures of arm swing could be used as a marker of gait function under dual-task conditions in Parkinson's disease patients.

Methods: Twenty-three patients with Parkinson's disease completed single and dual-task cognitive-motor tests while walking on a treadmill at a self-selected rate.

Simulation of lower limb axial arterial length change during locomotion.

The effect of external forces on axial arterial wall mechanics has conventionally been regarded as secondary to hemodynamic influences. However, arteries are similar to muscles in terms of the manner in which they traverse joints, and their three-dimensional geometrical requirements for joint motion. This study considers axial arterial shortening and elongation due to motion of the lower extremity during gait, ascending stairs, and sitting-to-standing motion.