Search Results - "Suresh, Nina L"

Motor unit pool organization examined via spike-triggered averaging of the surface electromyogram by Hu, Xiaogang, Rymer, William Z, Suresh, Nina L

“…Voluntary muscle force control is accomplished both by recruitment of motor units (MUs) and by firing rate modulation of active MUs. Typically, MU recruitment…”
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Muscle fatigue increases beta-band coherence between the firing times of simultaneously active motor units in the first dorsal interosseous muscle by McManus, Lara, Hu, Xiaogang, Rymer, William Z, Suresh, Nina L, Lowery, Madeleine M

“…Synchronization between the firing times of simultaneously active motor units (MUs) is generally assumed to increase during fatiguing contractions. To date,…”
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Spatial Analysis of Multichannel Surface EMG in Hemiplegic Stroke by Rasool, Ghulam, Afsharipour, Babak, Suresh, Nina L., Rymer, William Z.

“…We investigated spatial activation patterns of upper extremity muscles during isometric force generation in both intact persons and in hemispheric stroke…”
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Extracting extensor digitorum communis activation patterns using high-density surface electromyography by Hu, Xiaogang, Suresh, Nina L, Xue, Cindy, Rymer, William Z

“…The extensor digitorum communis muscle plays an important role in hand dexterity during object manipulations. This multi-tendinous muscle is believed to be…”
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Characteristic Variation of Electromechanical Delay After the Botulinum Toxin Injection in Spastic Biceps Brachii Muscles by Chandra, Sourav, Afsharipour, Babak, Rymer, William Z, Suresh, Nina L

“…The objective of this study was to characterize the effects of intramuscular botulinum toxin (BT) injections on the electromechanical delay (EMD) in spastic…”
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Stretch reflex excitability in contralateral limbs of stroke survivors is higher than in matched controls by Afzal, Taimoor, Chardon, Matthieu K, Rymer, William Z, Suresh, Nina L

“…Spasticity, characterized by hyperreflexia, is a motor impairment that can arise following a hemispheric stroke. While the neural mechanisms underlying…”
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Motor Unit Activity during Fatiguing Isometric Muscle Contraction in Hemispheric Stroke Survivors by McManus, Lara, Hu, Xiaogang, Rymer, William Z, Suresh, Nina L, Lowery, Madeleine M

“…Enhanced muscle weakness is commonly experienced following stroke and may be accompanied by increased susceptibility to fatigue. To examine the contributions…”
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Origins of Abnormal Excitability in Biceps Brachii Motoneurons of Spastic-Paretic Stroke Survivors by Mottram, Carol J, Suresh, Nina L, Heckman, C. J, Gorassini, Monica A, Rymer, William Z

“…1 Sensory Motor Performance Program, Rehabilitation Institute of Chicago; 2 Department of Physiology and Department of Physical Medicine and Rehabilitation,…”
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Motor unit firing rate patterns during voluntary muscle force generation: a simulation study by Hu, Xiaogang, Rymer, William Z, Suresh, Nina L

“…Muscle force is generated by a combination of motor unit (MU) recruitment and changes in the discharge rate of active MUs. There have been two basic MU…”
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Altered Motor Unit Discharge Coherence in Paretic Muscles of Stroke Survivors by Dai, Chenyun, Suresh, Nina L, Suresh, Aneesha K, Rymer, William Zev, Hu, Xiaogang

“…After a cerebral stroke, a series of changes at the supraspinal and spinal nervous system can alter the control of muscle activation, leading to persistent…”
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Control of motor unit firing during step-like increases in voluntary force by Hu, Xiaogang, Rymer, William Z, Suresh, Nina L

“…In most skeletal muscles, force is generated by a combination of motor unit (MU) recruitment and increases in the firing rate of previously active MUs. Two…”
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Quantifying the Deep Tendon Reflex Using Varying Tendon Indentation Depths: Applications to Spasticity by Chardon, Matthieu K., Rymer, W. Zev, Suresh, Nina L.

“…The deep tendon reflex (DTR) is often utilized to characterize the neuromuscular health of individuals because it is cheap, quick to implement, and requires…”
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Prolonged time course of population excitatory postsynaptic potentials in motoneurons of chronic stroke survivors by Son, Jongsang, Hu, Xiaogang, Suresh, Nina L, Rymer, William Z

“…Hyperexcitability of spinal motoneurons may contribute to muscular hypertonia after hemispheric stroke. The origins of this hyperexcitability are not clear,…”
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Accuracy assessment of a surface electromyogram decomposition system in human first dorsal interosseus muscle by Hu, Xiaogang, Rymer, William Z, Suresh, Nina L

“…The aim of this study is to assess the accuracy of a surface electromyogram (sEMG) motor unit (MU) decomposition algorithm during low levels of muscle…”
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Changes in motor unit behavior following isometric fatigue of the first dorsal interosseous muscle by McManus, Lara, Hu, Xiaogang, Rymer, William Z, Lowery, Madeleine M, Suresh, Nina L

“…The neuromuscular strategies employed to compensate for fatigue-induced muscle force deficits are not clearly understood. This study utilizes surface…”
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Performance Evaluation of a Wearable Tattoo Electrode Suitable for High-Resolution Surface Electromyogram Recording by Chandra, Sourav, Li, Jinghua, Afsharipour, Babak, Cardona, Andres F., Suresh, Nina L., Tian, Limei, Deng, Yujun, Zhong, Yishan, Xie, Zhaoqian, Shen, Haixu, Huang, Yonggang, Rogers, John A., Rymer, William Z.

“…Objective : High-density surface electromyography (HD-sEMG) has been utilized extensively in neuromuscular research. Despite its potential advantages,…”
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Assessing altered motor unit recruitment patterns in paretic muscles of stroke survivors using surface electromyography by Hu, Xiaogang, Suresh, Aneesha K, Rymer, William Z, Suresh, Nina L

“…The advancement of surface electromyogram (sEMG) recording and signal processing techniques has allowed us to characterize the recruitment properties of a…”
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Altered motor unit discharge patterns in paretic muscles of stroke survivors assessed using surface electromyography by Hu, Xiaogang, Suresh, Aneesha K, Rymer, William Z, Suresh, Nina L

“…Hemispheric stroke survivors often show impairments in voluntary muscle activation. One potential source of these impairments could come from altered control…”
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Reliability of spike triggered averaging of the surface electromyogram for motor unit action potential estimation by Hu, Xiaogang, Rymer, William Z., Suresh, Nina L.

“…ABSTRACT Introduction: The reliability of estimated motor unit parameters using spike triggered averaging (STA) of the surface electromyogram (sEMG) has not…”
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Characterization of Differences in the Time Course of Reflex and Voluntary Responses Following Botulinum Toxin Injections in Chronic Stroke Survivors by Afsharipour, Babak, Chandra, Sourav, Li, Guijin, Rymer, William Z., Suresh, Nina L.

“…Spasticity is a major impairment that can occur following a hemispheric stroke and is often treated with injections of botulinum toxin, a neurotoxin that…”
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