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Siddhartha Sikdar
George Mason University
135Publications
17H-index
1,133Citations
Publications 131
Newest
#1Vy Phan (NIH: National Institutes of Health)
#2Jay P. Shah (NIH: National Institutes of Health)H-Index: 20
Last.Lynn H. Gerber (GMU: George Mason University)H-Index: 48
view all 10 authors...
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#1Ananya S. Dhawan (GMU: George Mason University)H-Index: 2
#2Biswarup Mukherjee (GMU: George Mason University)H-Index: 3
Last.Siddhartha Sikdar (GMU: George Mason University)H-Index: 17
view all 10 authors...
Technological advances in multi-articulated prosthetic hands have outpaced the development of methods to intuitively control these devices. In fact, prosthetic users often cite "difficulty of use" as a key contributing factor for abandoning their prostheses. To overcome the limitations of the currently pervasive myoelectric control strategies, namely unintuitive proportional control of multiple degrees-of-freedom, we propose a novel approach: proprioceptive sonomyographic control. Unlike myoelec...
Source
#1Qi XingH-Index: 3
#2Parag V. ChitnisH-Index: 8
Last.Qi WeiH-Index: 7
view all 6 authors...
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#1Vicki L. Gray (UMB: University of Maryland, Baltimore)H-Index: 5
#2Andrew P. Goldberg (UMB: University of Maryland, Baltimore)H-Index: 40
Last.Brajesh K. Lal (UMB: University of Maryland, Baltimore)H-Index: 35
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Abstract Background Atherosclerosis of the carotid bifurcation with plaque formation causes asymptomatic carotid artery stenosis (ACAS), which may also be associated with cerebral hypoperfusion. Cerebral hypoperfusion adversely affects multiple aspects of mobility and cognition. This study tests the hypothesis that community-dwelling older adults with a 50% or greater diameter-reducing ACAS will have mobility and cognitive impairments that heighten their risk for falls. Methods Eighty community-...
1 CitationsSource
#1Matthew T. Chrencik (UMB: University of Maryland, Baltimore)H-Index: 1
#2Amir Khan (GMU: George Mason University)H-Index: 9
Last.Brajesh K. Lal (UMB: University of Maryland, Baltimore)H-Index: 35
view all 9 authors...
Abstract Objective Quantification of carotid plaque morphology (geometry and tissue composition) may help stratify risk for future stroke and assess plaque progression or regression in response to medical risk factor modification. We assessed the feasibility and reliability of morphologic measurements of carotid plaques using computed tomography angiography (CTA) and determined the minimum detectable change in plaque features by this approach. Methods CTA images of both carotid arteries in 50 pa...
2 CitationsSource
#1Brajesh K. Lal (UMB: University of Maryland, Baltimore)H-Index: 35
#2Amir Khan (GMU: George Mason University)H-Index: 9
Last.Siddhartha Sikdar (GMU: George Mason University)H-Index: 17
view all 8 authors...
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#1Gabriel Antoniak (Duke University)
#2Tirthabir Biswas (LUC: Loyola University Chicago)H-Index: 27
Last.Vikas Bhandawat (Duke University)H-Index: 9
view all 6 authors...
ABSTRACT Despite the overall complexity of legged locomotion, the motion of the center of mass (COM) itself is relatively simple, and can be qualitatively described by simple mechanical models. In particular, walking can be qualitatively modeled by a simple model in which each leg is described by a spring-loaded inverted pendulum (SLIP). However, SLIP has many limitations and is unlikely to serve as a quantitative model. As a first step to obtaining a quantitative model for walking, we explored ...
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#1Shriniwas Patwardhan (GMU: George Mason University)H-Index: 1
#2Ananya S. Dhawan (GMU: George Mason University)H-Index: 2
Last.Siddhartha Sikdar (GMU: George Mason University)H-Index: 17
view all 6 authors...
Prosthetics need to incorporate the users sense of proprioception into the control paradigm to provide intuitive control, and reduce training times and prosthetic rejection rates. In the absence of functional tasks with a prosthetic, virtual cursor control tasks have been used to train users to control multiple degrees of freedom. In this study, A proportional position signal was derived from the cross-sectional ultrasound images of the users forearm. We designed a virtual cursor control task wi...
Source
#1Brajesh K. Lal (UMD: University of Maryland, College Park)H-Index: 35
#2Matthew Chrencik (UMD: University of Maryland, College Park)
Last.Thomas G. Brott (Mayo Clinic)H-Index: 61
view all 16 authors...
Source
#1Gabriel Antoniak (Duke University)
#2Tirthabir Biswas (LUC: Loyola University Chicago)H-Index: 27
Last.Vikas Bhandawat (Duke University)H-Index: 9
view all 6 authors...
Despite the overall complexity of legged locomotion, the motion of the center of mass (COM) itself is relatively simple, and can be qualitatively described by simple mechanical models. The spring-loaded inverted pendulum (SLIP) is one such model, and describes both the COM motion and the ground reaction forces (GRFs) during running. Similarly, walking can be modeled by two SLIP-like legs (double SLIP or DSLIP). However, DSLIP has many limitations and is unlikely to serve as a quantitative model ...
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