IEEE Transactions on Biomedical Engineering

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The impact of ACL laxity on a bicondylar robotic knee and implications in human joint biomechanics
A robot model of the human knee provides a new way to investigate joint biomechanics. The specially designed joint has geometry copied from human bones scans and uses springs for ligaments. A knee cap (patella) and tendons transmit forces from an antagonistic pair of actuators, like in the human leg. This method overcomes many of the experimental limitations from using human tissue. The robot demonstrates the unique way in which the sliding of the joint surfaces allows the human knee mechanism to compensate when critical structures such as the anterior cruciate ligaments (ACL) are removed... Read more
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Synergy-Based FES for Post-Stroke Rehabilitation of Upper-Limb Motor Functions
        Functional electrical stimulation (FES) is capable of activating muscles that are under-recruited in neurological diseases, such as stroke. Therefore, FES provides a promising technology for assisting upper-limb motor functions in rehabilitation following stroke. However, the full benefits of FES may... Read more
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A Portable Passive Rehabilitation Robot for Upper-Extremity Functional Resistance Training
Loss of arm function is common after neurological injuries, such as stroke or cerebral palsy. Robotic devices that address muscle strength deficits in a task-specific manner can assist in the recovery of arm function; however, current devices are typically too... Read more
Articles, Published Articles
High Resolution Cervical Auscultation Signal Features Reflect Vertical and Horizontal Displacement of the Hyoid Bone During Swallowing
        Abstract Millions of people across the globe suffer from swallowing difficulties, known as dysphagia, which can lead to malnutrition, pneumonia, and even death. Swallowing cervical auscultation, which has been suggested as a noninvasive screening method for dysphagia, has not been associated... Read more
Articles, Published Articles
Intuitive Clinician Control Interface for a Powered Knee-Ankle Prosthesis: A Case Study
      This paper presents a potential solution to the challenge of configuring powered knee-ankle prostheses in a clinical setting. Typically, powered prostheses use impedance-based control schemes that contain several independent controllers which correspond to consecutive periods along the gait cycle. This... Read more
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Energy-Optimal Human Walking With Feedback-Controlled Robotic Prostheses: A Computational Study
  Lower-limb amputees typically experience reduced mobility and higher metabolic rates than non-amputees. It may be possible to improve their mobility and metabolic rate with an optimized robotic prosthesis. Here, we use large-scale trajectory optimization on a simulated transtibial amputee with... Read more
Articles, Published Articles
Effects of Real-World Versus Virtual Environments on Joint Excursions in Full-Body Reaching Tasks
Abstract Objective: Starting from an upright standing posture and reaching for a target that requires some forward bending of the trunk can involve many different configurations of the trunk and limb segments. We sought to determine if configurations of the limb... Read more
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Coordination of Reach-to-Grasp Kinematics in Individuals With Childhood-Onset Dystonia Due to Hemiplegic Cerebral Palsy
Functional reaching is impaired in dystonia. Here, we analyze upper extremity kinematics to quantify timing and coordination abnormalities during unimanual reach-to-grasp movements in individuals with childhood-onset unilateral wrist dystonia. Kinematics were measured during movements of both upper limbs in a... Read more
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A Novel Computerized Tool to Stratify Risk in Carotid Atherosclerosis Using Kinematic Features of the Arterial Wall
Gastounioti, S. Makrodimitris, S. Golemati, N. P. E. Kadoglou, C. D. Liapis, and K. S. Nikita In this paper, we address valid risk stratification for carotid atherosclerosis, which is a crucial public health challenge with major effects for both patient safety... Read more
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Design of Multiple Axis Robotic Platform for Postural Stability Analysis
Abstract This paper presents the design and implementation of IsiMove, a new dynamic posturography platform. It allows the evaluation of the static and dynamic balance of a human placed on a force plate. IsiMove is a robotic platform open kinematic with... Read more