Search Results - "Charles, Steven K"

The passive stiffness of the wrist and forearm by Formica, Domenico, Charles, Steven K, Zollo, Loredana, Guglielmelli, Eugenio, Hogan, Neville, Krebs, Hermano I

“…Because wrist rotation dynamics are dominated by stiffness (Charles SK, Hogan N. J Biomech 44: 614-621, 2011), understanding how humans plan and execute…”
Get full text

Online Tracking of the Phase Difference Between Neural Drives to Antagonist Muscle Pairs in Essential Tremor Patients by Puttaraksa, Gonthicha, Muceli, Silvia, Barsakcioglu, Deren Y., Holobar, Ales, Clarke, Alexander Kenneth, Charles, Steven K., Pons, Jose L., Farina, Dario

“…Transcutaneous electrical stimulation has been applied in tremor suppression applications. Out-of-phase stimulation strategies applied above or below motor…”
Get full text

curvature and variability of wrist and arm movements by Charles, Steven K, Hogan, Neville

“…The control of wrist rotations is critical for normal upper limb function, yet has received little attention. In this study, we characterized path shape of…”
Get full text

Transitions between discrete and rhythmic primitives in a unimanual task by Sternad, Dagmar, Marino, Hamal, Charles, Steven K, Duarte, Marcos, Dipietro, Laura, Hogan, Neville

“…Given the vast complexity of human actions and interactions with objects, we proposed that control of sensorimotor behavior may utilize dynamic primitives…”
Get full text

The signed helical angle: A technique for characterizing midfoot motion during gait by Bassett, Kirk E., Charles, Steven K., Bruening, Dustin A.

“…Quantifying motion in the midfoot during gait and other movements is important for a variety of applications, but challenging due to the complexity of the…”
Get full text

Compensating for Soft-Tissue Artifact Using the Orientation of Distal Limb Segments During Electromagnetic Motion Capture of the Upper Limb by Bons, Zachary, Dickinson, Taylor, Clark, Ryan, Beardsley, Kari, Charles, Steven K

“…Most motion capture measurements suffer from soft-tissue artifacts (STA). Especially affected are rotations about the long axis of a limb segment, such as…”
Get more information

Moving slowly is hard for humans: limitations of dynamic primitives by Park, Se-Woong, Marino, Hamal, Charles, Steven K, Sternad, Dagmar, Hogan, Neville

“…Mounting evidence suggests that human motor control uses dynamic primitives, attractors of dynamic neuromechanical systems that require minimal central…”
Get full text

Dynamics of wrist rotations by Charles, Steven K, Hogan, Neville

“…Abstract Understanding the dynamics of wrist rotations is important for many fields, including biomechanics, rehabilitation and motor neuroscience. This paper…”
Get full text

Hand and distal joint tremor are most coherent with the activity of elbow flexors and wrist extensors in persons with essential tremor by Free, Daniel B, Syndergaard, Ian, Pigg, Adam C, Muceli, Silvia, Hallett, Mark, Farina, Dario, Charles, Steven K

“…Essential tremor (ET) affects millions of people. Although frontline treatment options (medication, deep brain stimulation, and focused ultrasound ablation)…”
Get full text

Movement preferences of the wrist and forearm during activities of daily living by Anderton, Will, Tew, Scott, Ferguson, Spencer, Hernandez, Joshua, Charles, Steven K.

“…•This study characterized natural forearm and wrist behavior during daily activities•Subjects spent 50% of time in the central 20% of their functional range of…”
Get full text

Voluntary and tremorogenic inputs to motor neuron pools of agonist/antagonist muscles in essential tremor patients by Puttaraksa, Gonthicha, Muceli, Silvia, Gallego, Juan Álvaro, Holobar, Ales, Charles, Steven K, Pons, Jose L, Farina, Dario

“…Pathological tremor is an oscillation of body parts at 3-10 Hz, determined by the output of spinal motor neurons (MNs), which receive synaptic inputs from…”
Get full text

Feasibility of using the Leap Motion Controller to administer conventional motor tests: a proof-of-concept study by Kincaid, Clay, Johnson, Paula, Charles, Steven K

“…Although upper-limb movement impairments are common, the primary tools for assessing and tracking impairments in clinical settings are limited. Markerless…”
Get more information

Proximal-distal differences in movement smoothness reflect differences in biomechanics by Salmond, Layne H, Davidson, Andrew D, Charles, Steven K

“…Smoothness is a hallmark of healthy movement. Past research indicates that smoothness may be a side product of a control strategy that minimizes error…”
Get full text

Essential Tremor accentuates the pattern of tremor-band coherence between upper-limb muscles by Free, Daniel B, Syndergaard, Ian, Pigg, Adam C, Muceli, Silvia, Thompson-Westra, Johanna, Mente, Karin, Maurer, Carine W, Haubenberger, Dietrich, Hallett, Mark, Farina, Dario, Charles, Steven K

“…Although Essential Tremor is one of the most common movement disorders, current treatment options are relatively limited. Peripheral tremor suppression methods…”
Get full text

Dynamics of wrist and forearm rotations by Peaden, Allan W, Charles, Steven K

“…Abstract Human movement generally involves multiple degrees of freedom (DOF) coordinated in a graceful and seemingly effortless manner even though the…”
Get full text

Tracking Joint Angles During Whole-Arm Movements Using Electromagnetic Sensors by Clark, Ryan, Dickinson, Taylor, Loaiza, Johnfredy, Geiger, Daniel W, Charles, Steven K

“…Electromagnetic (EM) motion tracking systems are suitable for many research and clinical applications, including in vivo measurements of whole-arm movements…”
Get more information

Distribution of tremor among the major degrees of freedom of the upper limb in subjects with Essential Tremor by Pigg, Adam C., Thompson-Westra, Johanna, Mente, Karin, Maurer, Carine W., Haubenberger, Dietrich, Hallett, Mark, Charles, Steven K.

“…•We characterized the amount of tremor in the joints from the shoulder to the wrist.•Kinetic tremor was greatest in forearm pronation-supination and wrist…”
Get full text

Distribution of tremorogenic activity among the major superficial muscles of the upper limb in persons with Essential tremor by Standring, David J., Pigg, Adam C., Thompson-Westra, Johanna, Mente, Karin, Maurer, Carine W., Haubenberger, Dietrich, Hallett, Mark, Charles, Steven K.

“…•We measured power in the tremor band (4–8 Hz) in the 15 major superficial upper-limb muscles of persons with Essential Tremor.•Tremor-band power varied…”
Get full text

Fundamental Principles of Tremor Propagation in the Upper Limb by Davidson, Andrew D., Charles, Steven K.

“…Although tremor is the most common movement disorder, there exist few effective tremor-suppressing devices, in part because the characteristics of tremor…”
Get full text

Stiffness, not inertial coupling, determines path curvature of wrist motions by Charles, Steven K, Hogan, Neville

“…When humans rotate their wrist in flexion-extension, radial-ulnar deviation, and combinations, the resulting paths (like the path of a laser pointer on a…”
Get full text