Search results for: Maria K. Lebiedowska

Items from 1 to 13 out of 13 results

article

The role of exaggerated patellar tendon reflex in knee joint position sense in patients with cerebral palsy

Faustyna Manikowska, Brian Po-Jung Chen, Marek Jóźwiak, Maria K. Lebiedowska

Research in Developmental Disabilities > 2015 > 45-46 > Complete > 253-260

The aim of this pilot study was to determine if exaggerated patellar tendon jerk affects knee joint position sense (JPS) in cerebral palsy (CP) patients, by comparing JPS of the knee between participants with normal and exaggerated reflexes. The thresholds for reflex classification were based upon the data from able-bodied volunteers. JPS was measured as the ability of a subject (with eyes closed)...

article

Knee joint angular velocities and accelerations during the patellar tendon jerk

Maria K. Lebiedowska, Siddhartha Sikdar, Avinash Eranki, Lindsay Garmirian

Journal of Neuroscience Methods > 2011 > 198 > 2 > 255-259

Tendon jerk (TJ) is one of the most commonly used clinical tests in differential diagnosis of human motor disorders. There remains some ambiguity in the physiological interpretation of the test, especially with respect to its association to the functional status of patients. The TJ test inputs a non-physiological stimuli, but it is unclear to what degree the kinematics generated during the TJ test...

article

Knee resistance during passive stretch in patients with hypertonia

Maria K. Lebiedowska, John R. Fisk

Journal of Neuroscience Methods > 2009 > 179 > 2 > 323-330

The aims of the study were to determine by a portable method (1) whether velocity-dependent changes in knee resistance in patients with spastic paresis differ from those in non-disabled subjects, and (2) whether biomechanical measures of resistance can differentiate between neural and other factors that contribute to hypertonia (increased resistance). Biomechanical (hand-hold dynamometer, electrogoniometer)...

article

The influence of foot position on body dynamics

Maria K. Lebiedowska, Todd M. Wente, Michelle Dufour

Journal of Biomechanics > 2009 > 42 > 6 > 762-766

During locomotion, the human body exhibits inherent dynamic properties such as mass (M), stiffness (K) and damping (B). During the gait cycle, foot contact with the ground progresses from the heel to the toe. Contact forces between the foot and ground are defined as ground reaction forces (GRF). It is unclear how body dynamics are affected by foot landing position. If the shape of GRF is indicative...

article

Quantifying repeatability of the Wartenberg pendulum test parameters in children with spasticity

Malgorzata Syczewska, Maria K. Lebiedowska, Anand D. Pandyan

Journal of Neuroscience Methods > 2009 > 178 > 2 > 340-344

The Wartenberg (pendulum) test is commonly used in a variety of studies involving healthy subjects, patients with CP, stroke patients, and other neurological conditions. There is some evidence that the Wartenberg test may be able to differentiate healthy people from patients with spasticity. The aim of the study was to explore the within-session repeatability of primary outcome measures, i.e. relaxation...

article

Visual and proprioceptive feedback improves knee joint position sense

Timothy J. Brindle, J. C. Mizelle, Maria K. Lebiedowska, Jeri L. Miller, more

Knee Surgery, Sports Traumatology, Arthroscopy > 2009 > 17 > 1 > 40-47

Joint position sense (JPS), one method to assess proprioception, is the ability to replicate a target limb position. Feedback is commonly used to improve motor performance but it has not been demonstrated to improve JPS. The purpose of this study was to determine if feedback decreases error associated with knee JPS at three movement velocities. Healthy volunteers sat with their hip and knees flexed...

article

The kinematic consequences of invariant dynamics in children 6–18 years of age

Maria K. Lebiedowska

Journal of Biomechanics > 2008 > 41 > 11 > 2458-2464

The effect of limb dynamics on trajectory formation is unclear. The natural frequency of a limb is the major factor in its dynamics. It has previously been shown with an indirect measurement method that the natural frequency of body segments is invariant during human growth from the age of 6 to 18. The aim of our study was to determine, using a direct measurement method, whether human growth affects:...

article

Human Body Shape Index Based on an Experimentally Derived Model of Human Growth

Maria K. Lebiedowska, Katharine E. Alter, Steven J. Stanhope

The Journal of Pediatrics > 2008 > 152 > 1 > 45-49.e2

To test the assumption of geometrically similar growth by developing experimentally derived models of human body growth during the age interval of 5 to 18 years; to use these derived growth models to establish a new human body shape index (HBSI) based on natural age-related changes in human body shape (HBS); and to compare various metrics of relative body weight (body mass index [BMI], ponderal index...

article

Biomechanic characteristics of patients with spastic and dystonic hypertonia in cerebral palsy

Maria K. Lebiedowska, Deborah Gaebler-Spira, Richard S. Burns, John R. Fisk

Archives of Physical Medicine and Rehabilitation > 2004 > 85 > 6 > 875-880

Lebiedowska MK, Gaebler-Spira D, Burns RS, Fisk JR. Biomechanic characteristics of patients with spastic and dystonic hypertonia in cerebral palsy. Arch Phys Med Rehabil 2004;85:875-80.

article

Quantitative evaluation of reflex and voluntary activity in children with spasticity

Maria K. Lebiedowska, John Robert Fisk

Archives of Physical Medicine and Rehabilitation > 2003 > 84 > 6 > 828-837

Lebiedowska MK, Fisk JR. Quantitative evaluation of reflex and voluntary activity in children with spasticity

article

Invariant sway properties in children

Maria K. Lebiedowska, Malgorzata Syczewska

Gait & Posture > 2000 > 12 > 3 > 200 - 204

The ability to maintain upright body posture depends on the biomechanical properties of a body and on the execution of control programs. The aim of this study was to determine how the structural growth of the human body, between ages 7-18, affects spontaneous sway parameters and to determine how the visual feedback positional task changes body sway parameters. The selected parameters of postural sway...

article

The accuracy of knee motion obtained with different dynamic models of human knee joint

Maria K. Lebiedowska, Richard B. Stein

Gait & Posture > 1998 > 7 > 2 > 161

article

Changes in the lower leg moment of inertia due to child's growth

Maria K. Lebiedowska, Andrzej Polisiakiewicz

Journal of Biomechanics > 1997 > 30 > 7 > 723-728

During growth the size and shape of the child's body changes. It is not clear whether the shape of a body segment changes proportionally in children between the age 5 and 18 years. The aim of this study is to describe these changes for the lower leg moment of inertia in a population of children. The segment moment of inertia describes the mass distribution along the body segment axis. The moment...

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Journal of Biomechanics (3)
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Search results for: Maria K. Lebiedowska

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