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    • Directional Patterns
    • Denis Gravel
    • Denis Gravel: Influence Statistics

      Denis Gravel

      Denis Gravel

      Institut de Réadaptation Gingras-Lindsay-de-Montréal, Centre de Recherche Interdisciplinaire en Réadaptation (CRIR), Université de Montréal, C.P. 6128 Succ. Centre-Ville, ...

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      Denis Gravel:Expert Impact

      Concepts for whichDenis Gravelhas direct influence:Directional patterns,Hip flexors,Hemiparetic subjects,Stroke subjects,Dynamometric measurements,Muscle activation,Gait speed,Muscle weakness.

      Denis Gravel:KOL impact

      Concepts related to the work of other authors for whichfor which Denis Gravel has influence:Pelvic floor,Chronic stroke,Muscle strength,Urinary incontinence,Gait speed,Patellofemoral pain,Spinal cord injury.

      KOL Resume for Denis Gravel

      Year
      2013

      Institut de Réadaptation Gingras-Lindsay-de-Montréal, Centre de Recherche Interdisciplinaire en Réadaptation (CRIR), Université de Montréal, C.P. 6128 Succ. Centre-Ville, Montréal, QC, Canada, H3S 1M9, umontreal.ca

      2012

      École de réadaptation, Faculté de médecine, Université de Montréal, Québec, Canada

      2011

      École de Réadaptation, Université de Montréal, Montréal, Quebec, Canada

      2010

      Montréal Rehabilitation Institute, a research site of the Centre de Recherche Interdisciplinaire en Réadaptation, Montréal, QC, Canada

      2009

      School of Rehabilitation, Faculty of Medicine, University of Montreal, Montreal, Canada

      2008

      Center for Interdisciplinary Research in Rehabilitation of Greater Montreal, Montreal Rehabilitation Institute, Montreal, Canada

      2007

      Faculté de Médecine, École de réadaptation, Université de Montréal and Centre de recherche interdisciplinaire en réadaptation (CRIR), Institut de réadaptation de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Que., Canada H3C 3J7

      Center for Interdisciplinary Research in Rehabilitation of Greater Montreal, Montreal Rehabilitation Institute, 6300 Avenue Darlington, Montreal, Canada

      2006

      School of Rehabilitation, University of Montreal, C.P. 6128, Succursale Centre-Ville, Montreal, Que., Canada H3C 3J7

      Centre de recherche interdisciplinaire en réadaptation du Montréal métropolitain, Site Institut de réadaptation de Montréal, Montréal, Québec, Canada; École de réadaptation, Faculté de médecine, Université de Montréal, Montréal, Québec, Canada

      2005

      CRIR, Montreal Rehabilitation Institute site, Montreal, QC, Canada

      2004

      School of Rehabilitation, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada

      2003

      Centre de recherche interdisciplinaire en réadaptation du Montréal métropolitain––Site Institut de réadaptation de Montréal, Montréal, Que., Canada

      2002

      From the Institut de réadaptation de Montréal (DB, SB, NB, DG, RF) and the École de réadaptation (DB, DG, RF) and Département de mathématiques et statistique (YL), Université de Montréal, Montréal, Québec, Canada.

      2001

      School of Rehabilitation, University of Montreal, C.P. 6128, succursale Centre-ville, Montreal, Quebec, Canada, H3C 3J7

      1999

      Research Centre, Montreal Rehabilitation Institute, 6300 Ave. Darlington, Montreal, Quebec, Canada H3S 2J4

      1997

      Research Center, Montreal Rehabilitation Institute Montreal, USA

      École de Réadaptation, Université de Montréal and Institut de Réadaptation de Montréal Canada

      1996

      Research Centre, Montreal Rehabilitation Institute USA

      École de Réadaptation, Université de Montréal, Montréal, Québec, Canada

      1995

      Laboratoire de biomécanique, Département d'éducation physique, Canada

      1994

      Centre de recherche, Institut de réadaptation de Montréal, 6300 Ave. Darlington, H3S 2J4, Montréal, QC, Canada

      1993

      École de Réadaptation, Université de Montréal, 6300 Darlington Ave., Montréal, (Québec, Canada, H3S 2J4

      Research Centre, Montreal Rehabilitation Institute, 6300 Darlington Av., Montreal, Quebec, Canada

      1992

      Research Center, Montreal Rehabilitation Instittute, Montreal, Quebec, Canada

      1991

      Research Centre, Montreal Rehabilitation Institute, 6300 Darlington Ave., H3S 2J4, Montreal, Quebec, Canada

      1990

      Institute of Rehabilitation of Montreal, H3S 2J4, Montreal, Canada

      1988

      Faculty of Medicine, Laval University, Quebec P. Que. G1K 7P4, Canada

      1987

      Neurobiology Laboratory and Physiotherapy Department, Faculty of Medicine, Laval University, G1K 7P4, Quebec, Que., Canada

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      Sample of concepts for which Denis Gravel is among the top experts in the world.
      Concept World rank
      murs plantarflexor muscles #1
      absorption falling load #1
      signals triceps #1
      axial rotator #1
      axial rotation moments #1
      semicrouched lifting test #1
      novices handling #1
      stationarity emg signals #1
      generated trunk #1
      muscle fatigability strength #1
      bb motor units #1
      mpf force levels #1
      mpf increasing #1
      moment extensor #1
      muscles muscle mass #1
      subjects skinfold #1
      speed hemiparetic #1
      asymmetrical position trunk #1
      electromyography timeseries #1
      ramp elbow #1
      muscular utilization #1
      mvc step contractions #1
      elbows absorption #1
      murs plantarflexor #1
      emg indices range #1
      healthy subjects murs #1
      skinfold layer #1
      sudden maximal efforts #1
      higher muscular demands #1
      maximal static #1
      coupled mirrors #1
      falling box #1
      generated extensor #1
      phi standard #1
      emg spectrums #1
      efforts lateral #1
      physical endurance sensitivity #1
      preloading contraction #1
      load absorption elbows #1
      tend fatigue test #1
      preloading tests #1
      512ms windows #1
      single 256ms windows #1
      error9 women #1
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      Prominent publications by Denis Gravel

      KOL-Index: 14703

      OBJECTIVE: To determine, using the Muscular Utilization Ratio (MUR) method, whether plantarflexor weakness is among the factors preventing stroke subjects from walking at faster speeds. Potential compensations by the hip flexors were also examined.

      DESIGN: A convenience sample of 17 chronic stroke subjects in a context of a descriptive study.

      BACKGROUND: Gait speed is correlated with the residual strength of the muscles involved in gait in stroke subjects. However, it has not been ...

      Known for Gait Speed | Stroke Subjects | Hip Flexors | Plantarflexor Weakness | Skeletal Range
      KOL-Index: 13490

      BACKGROUND: The asymmetrical motor pattern of persons with hemiparesis influences the performance of activities that require interactions between the two sides of the body.

      METHODS: Twelve subjects with a chronic hemiparesis were asked to stand up and sit down at their natural speed in the following foot positions: (1) spontaneous; (2) symmetrical; (3) asymmetrical with the affected foot placed backward; and (4) asymmetrical with the unaffected foot placed backward. Forces were recorded ...

      Known for Foot Position | Chair Height | Vertical Forces | Stand Tasks | Force Plates
      KOL-Index: 12708

      AIMS: To compare the pelvic floor muscle (PFM) function in continent and stress urinary incontinent women using dynamometric measurements.

      METHODS: Thirty continent women and 59 women suffering from stress urinary incontinence (SUI), aged between 21 and 44 and parous, participated in the study. An instrumented speculum was used to assess the static parameters of the PFM: (1) passive force at 19 and 24 mm of vaginal aperture (antero-posterior diameter), (2) maximal strength in a ...

      Known for Incontinent Women | Stress Urinary | Floor Muscle | Pfm Function | Dynamometric Measurements
      KOL-Index: 12444

      BACKGROUND: Although reaching an optimal level of independence during sitting pivot transfer is crucial for individuals with spinal cord injury, little is known regarding the kinematic requirements of this functional task.

      METHODS: Ten males with spinal cord injury performed independent sitting pivot transfers between an initial seat and a target one placed at same (50 cm), lower (40 cm), and higher heights (60 cm) than the initial one, using their usual movement strategies. ...

      Known for Pivot Transfers | Spinal Cord Injury | Upper Extremity | Initial Seat | Functional Task
      KOL-Index: 12058

      INTRODUCTION: Back muscle capacity is impaired in chronic low back pain patients but no motivation-free test exists to measure it. The aims of this study were to assess the reliability and criterion validity of electromyographic indices of muscle fatigue during an intermittent absolute endurance test.

      METHODS: Healthy subjects (44 males and 29 females; age: 20-55 yrs) performed three maximal voluntary contractions (MVC) and a fatigue test while standing in a static dynamometer. Surface ...

      Known for Muscle Capacity | Electromyographic Indices | Intermittent Static Contractions | Absolute Endurance Strength | Endurance Test
      KOL-Index: 11821

      This article reports the results of a comparative study on directional patterns of muscle activation at the lower limb in 15 subjects with hemiparesis and 18 healthy subjects. Subjects were required to exert static hip and knee torques using multidirectional and biarticular dynamometers designed for the lower limbs. Hip torques were performed in abduction, adduction, flexion, extension, and in combined directions (e.g., hip flexion and abduction) and knee torques were exerted in flexion ...

      Known for Directional Patterns | Muscle Activation | Lower Limb | Subjects Torques | Flexion Extension
      KOL-Index: 11111

      3D analysis of the gait of children with Duchenne muscular dystrophy (DMD) was the topic of only a few studies and none of these considered the effect of gait velocity on the gait parameters of children with DMD. Gait parameters of 11 children with DMD were compared to those of 14 control children while considering the effect of gait velocity using 3D biomechanical analysis. Kinematic and kinetic gait parameters were measured using an Optotrak motion analysis system and AMTI force plates ...

      Known for Muscular Dystrophy | Children Dmd | Gait Velocity | Muscle Weakness | Dorsiflexion Moment
      KOL-Index: 10955

      Because of extensor weakness, children with Duchenne muscular dystrophy (DMD) maintain internal flexion moments at the joints of the lower extremities when they walk. We believe that at the ankle, the plantar flexion moments caused by contractures may contribute significantly to the production of the net ankle flexion moment during the gait in these children. The goal of the present study is to quantify ankle plantar flexion passive moments that may be associated with the presence of ...

      Known for Muscular Dystrophy | Children Dmd | Plantar Flexion | Muscle Weakness | Ankle Joint
      KOL-Index: 10582

      The purpose of this study was to assess different measurement strategies to increase the reliability of different electromyographic (EMG) indices developed for the assessment of back muscle impairments. Forty male volunteers (20 controls and 20 chronic low back pain patients) were assessed on three sessions at least 2 days apart within 2 weeks. Surface EMG signals were recorded from four pairs (bilaterally) of back muscles (multifidus at the L5 level, iliocostalis lumborum at L3, and ...

      Known for Muscle Fatigue | Measurement Strategies | Emg Indices | Skeletal Reproducibility | L5 Level
      KOL-Index: 10558

      OBJECTIVES: To evaluate the reliability (intertrial, interevaluator) and the concurrent validity of strength measurements obtained with a chair-fixed dynamometer and to recommend a clinical protocol that minimizes standard error of measurement (SEM).

      DESIGN: Within-session repeated measures of maximal static strength of knee flexors and extensors at 30 degrees and 60 degrees of flexion on the chair-fixed and Cybex dynamometers.

      SETTING: Ambulatory physiotherapy department of a ...

      Known for Knee Arthroplasty | Strength Measurements | Reliability Validity | Articular Reproducibility | Fixed Dynamometer
      KOL-Index: 10357

      INTRODUCTION: In a previous paper, standard surface electromyographic (EMG) indices of muscle fatigue, which are based on the lowering of the median or mean frequencies of the EMG power spectrum in time, were applied during an intermittent absolute endurance test and were evaluated relative to criterion validity and test-retest reliability. The aims of this study were to assess mechanical and alternative EMG correlates of muscle fatigue.

      METHODS: Healthy subjects (44 males and 29 ...

      Known for Muscle Capacity | Endurance Test | Intermittent Static Contractions | Emg Indices | Exhaustion Strength
      KOL-Index: 10159

      The passive properties of the pelvic floor muscles (PFM) might play a role in stress urinary incontinence (SUI) pathophysiology.

      AIM: To investigate the test-retest reliability of the dynamometric passive properties of the PFM in postmenopausal SUI women.

      METHODS: Thirty-two SUI postmenopausal women were convened to two sessions 2 weeks apart. In each session, the measurements were repeated twice. The pelvic floor musculature was evaluated in four different conditions: (1) forces ...

      Known for Postmenopausal Women | Urinary Incontinence | Passive Properties | Pelvic Floor Muscles | Minimal Aperture
      KOL-Index: 10104

      The goal of the present study was to compare electromyogram (EMG) power spectra obtained from step (constant force level) and ramp (progressive increase in the force level) isometric contractions. Data windows of different durations were also analysed for the step contractions, in order to evaluate the stability of EMG power spectrum statistics. Fourteen normal subjects performed (1) five ramp elbow extensions ranging from 0 to 100% of the maximum voluntary contraction (MVC) and (2) ...

      Known for Step Contractions | Mpf Mf | Force Level | Emg Spectra | Differences P005
      KOL-Index: 10040

      OBJECTIVE: The purpose of this study was to determine the movement patterns and the muscular demand during a posterior transfer maneuver on a level surface in individuals with spinal cord injuries.

      DESIGN: Six participants with high-level spinal cord injury (C7 to T6) were compared to five participants with low-level spinal cord injury (T11 to L2) with partial or complete control of abdominal musculature.

      BACKGROUND: Developing an optimal level of independence for transfer activities ...

      Known for Spinal Cord | Muscular Demand | Lift Phase | Movement Patterns | Shoulder Muscles
      KOL-Index: 10033

      BACKGROUND: No study has reported the differences between sides in the net muscular moment of lower limbs of subjects with hemiparesis during sit-to-stand and stand-to-sit tasks in various foot positions. Moreover, the asymmetry of lower-joint moments has not yet been related to muscular weakness of the lower limbs in this population.

      METHODS: A convenience sample of 12 individuals (mean age (standard deviation): 49.7 (9.0) years) with chronic hemiparesis due to stroke were asked to ...

      Known for Joint Moments | Foot Positions | Hip Knee | Lower Limbs | Stand Tasks

      Key People For Directional Patterns

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      Institut de Réadaptation Gingras-Lindsay-de-Montréal, Centre de Recherche Interdisciplinaire en Réadaptation (CRIR), Université de Montréal, C.P. 6128 Succ. Centre-Ville, Montréal, QC, Canada, H3S 1M9, umontreal.ca | Laboratoire de Pathokinésiologie,

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