Search Results - "Christou, Evangelos A A"

Low-Frequency Oscillations and Control of the Motor Output by Lodha, Neha, Christou, Evangelos A

“…A less precise force output impairs our ability to perform movements, learn new motor tasks, and use tools. Here we show that low-frequency oscillations in…”
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Increased temporal stride variability contributes to impaired gait coordination after stroke by Patel, Prakruti, Enzastiga, Diana, Casamento-Moran, Agostina, Christou, Evangelos A., Lodha, Neha

“…Heightened motor variability is a prominent impairment after stroke. During walking, stroke survivors show increased spatial and temporal variability; however,…”
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Age-associated increase in postural variability relate to greater low-frequency center of pressure oscillations by Delmas, Stefan, Watanabe, Tatsunori, Yacoubi, Basma, Christou, Evangelos A.

“…•Older adults show greater COP SD than young adults during a forward postural lean.•Older adults show greater COP oscillations <0.5 Hz relative to young…”
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Detection of postural control in early Parkinson's disease: Clinical testing vs. modulation of center of pressure by Kamieniarz, Anna, Michalska, Justyna, Marszałek, Wojciech, Stania, Magdalena, Słomka, Kajetan J, Gorzkowska, Agnieszka, Juras, Grzegorz, Okun, Michael S, Christou, Evangelos A

“…Little is known about the early stage balance changes in PD. Many clinicians assume that there are no postural issues in early PD because of failure to…”
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Motor Output Variability Impairs Driving Ability in Older Adults by Lodha, Neha, Moon, Hwasil, Kim, Changki, Onushko, Tanya, Christou, Evangelos A

“…The functional declines with aging relate to deficits in motor control and strength. In this study, we determine whether older adults exhibit impaired driving…”
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Voluntary control of forward leaning posture relates to low-frequency neural inputs to the medial gastrocnemius muscle by Watanabe, Tatsunori, Nojima, Ippei, Sugiura, Hideshi, Yacoubi, Basma, Christou, Evangelos A.

“…•COP oscillations <0.5 Hz affect COP variability during a forward postural lean.•COP oscillations <0.5 Hz are associated with EMG burst oscillations <0.5…”
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Force control is related to low-frequency oscillations in force and surface EMG by Moon, Hwasil, Kim, Changki, Kwon, Minhyuk, Chen, Yen Ting, Onushko, Tanya, Lodha, Neha, Christou, Evangelos A

“…Force variability during constant force tasks is directly related to oscillations below 0.5 Hz in force. However, it is unknown whether such oscillations exist…”
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Voluntary reduction of force variability via modulation of low-frequency oscillations by Park, Seoung Hoon, Casamento-Moran, Agostina, Yacoubi, Basma, Christou, Evangelos A.

“…Visual feedback can influence the force output by changing the power in frequencies below 1 Hz. However, it remains unknown whether visual guidance can help an…”
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Force-Control vs. Strength Training: The Effect on Gait Variability in Stroke Survivors by Patel, Prakruti, Casamento-Moran, Agostina, Christou, Evangelos A., Lodha, Neha

“…Purpose: Increased gait variability in stroke survivors indicates poor dynamic balance and poses a heightened risk of falling. Two primary motor impairments…”
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Increased force variability in chronic stroke: contributions of force modulation below 1 Hz by Lodha, Neha, Misra, Gaurav, Coombes, Stephen A, Christou, Evangelos A, Cauraugh, James H

“…Increased force variability constitutes a hallmark of arm disabilities following stroke. Force variability is related to the modulation of force below 1 Hz in…”
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Cognitive and motor deficits contribute to longer braking time in stroke by Lodha, Neha, Patel, Prakruti, Shad, Joanna M, Casamento-Moran, Agostina, Christou, Evangelos A

“…Braking is a critical determinant of safe driving that depends on the integrity of cognitive and motor processes. Following stroke, both cognitive and motor…”
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Greater amount of visual information exacerbates force control in older adults during constant isometric contractions by Kennedy, Deanna M., Christou, Evangelos A.

“…The purpose of this study was to compare control of force and modulation of agonist muscle activity of young and older adults when the amount of visual…”
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Older adults use a motor plan that is detrimental to endpoint control by Delmas, Stefan, Choi, Yoon Jin, Komer, Marcel, Weintraub, Michelle, Yacoubi, Basma, Christou, Evangelos A.

“…Here, we aimed to understand if older adults (OA) use a unique motor plan that is detrimental to endpoint control. We performed two experiments that used ankle…”
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Genome-wide association study in frontal fibrosing alopecia identifies four susceptibility loci including HLA-B07:02 by Tziotzios, Christos, Petridis, Christos, Dand, Nick, Ainali, Chrysanthi, Saklatvala, Jake R., Pullabhatla, Venu, Onoufriadis, Alexandros, Pramanik, Rashida, Baudry, David, Lee, Sang Hyuck, Wood, Kristie, Liu, Lu, Seegobin, Seth, Michelotti, Gregory A., Lwin, Su M., Christou, Evangelos A. A., Curtis, Charles J., de Rinaldis, Emanuele, Saxena, Alka, Holmes, Susan, Harries, Matthew, Palamaras, Ioulios, Cunningham, Fiona, Parkins, Gregory, Kaur, Manjit, Farrant, Paul, McDonagh, Andrew, Messenger, Andrew, Jones, Jennifer, Jolliffe, Victoria, Ali, Iaisha, Ardern-Jones, Michael, Mitchell, Charles, Burrows, Nigel, Atkar, Ravinder, Banfield, Cedric, Alexandroff, Anton, Champagne, Caroline, Cooper, Hywel L., Vañó-Galván, Sergio, Molina-Ruiz, Ana Maria, Perez, Nerea Ormaechea, Patel, Girish K., Macbeth, Abby, Page, Melanie, Bryden, Alyson, Mowbray, Megan, Wahie, Shyamal, Armstrong, Keith, Cooke, Nicola, Goodfield, Mark, Man, Irene, de Berker, David, Dunnill, Giles, Takwale, Anita, Rao, Archana, Siah, Tee-Wei, Sinclair, Rodney, Wade, Martin S., Dlova, Ncoza C., Setterfield, Jane, Lewis, Fiona, Bhargava, Kapil, Kirkpatrick, Niall, Estivill, Xavier, Stefanato, Catherine M., Flohr, Carsten, Spector, Timothy, Watt, Fiona M., Smith, Catherine H., Barker, Jonathan N., Fenton, David A., Simpson, Michael A., McGrath, John A.

“…Frontal fibrosing alopecia (FFA) is a recently described inflammatory and scarring type of hair loss affecting almost exclusively women. Despite a dramatic…”
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Motor control differs for increasing and releasing force by Park, Seoung Hoon, Kwon, MinHyuk, Solis, Danielle, Lodha, Neha, Christou, Evangelos A

“…Control of the motor output depends on our ability to precisely increase and release force. However, the influence of aging on force increase and release…”
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Motor Training After Stroke: A Novel Approach for Driving Rehabilitation by Lodha, Neha, Patel, Prakruti, Casamento-Moran, Agostina, Christou, Evangelos A

“…A key component of safe driving is a well-timed braking performance. Stroke-related decline in motor and cognitive processes slows braking response and puts…”
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Visual load and variability of muscle activation: Effects on reactive driving of older adults by Kim, Changki, Yacoubi, Basma, Christou, Evangelos A.

“…The functional significance of the increase in motor output variability with increased visual information processing in older adults remains unclear. Here, we…”
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Control of oscillatory force tasks: Low-frequency oscillations in force and muscle activity by Park, Seoung Hoon, Kim, Changki, Yacoubi, Basma, Christou, Evangelos A.

“…•The <0.25 Hz oscillations in force relate to trajectory variability and error during the oscillatory force task.•The modulation of the <0.25 Hz oscillations…”
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Reducing task difficulty during practice improves motor learning in older adults by Onushko, Tanya, Kim, Changki, Christou, Evangelos A.

“…Theoretically, greater motor output variability can inhibit motor learning by inhibiting task acquisition during practice. Although the age-associated…”
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Motor plan differs for young and older adults during similar movements by Casamento-Moran, Agostina, Chen, Yen-Ting, Lodha, Neha, Yacoubi, Basma, Christou, Evangelos A

“…Older adults exhibit altered activation of the agonist and antagonist muscles during goal-directed movements compared with young adults. However, it remains…”
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