Jules G. Becher

Annet J Dallmeijer8
Richard T Jaspers6
R Jeroen Vermeulen4
8Annet J Dallmeijer
6Richard T Jaspers
4R Jeroen Vermeulen
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This study validates two-dimensional (2D) ultrasound measurements of muscle geometry of the human medial gastrocnemius (GM) and investigates effects of probe orientation on errors in these measurements. Ultrasound scans of GM muscle belly were made both on human cadavers (n = 4) and on subjects in vivo (n = 5). For half of the cadavers, ultrasound scans(More)
3D kinematic measurements in children with cerebral palsy (CP) to assess gait deviations can only be performed in gait laboratories using optoelectronic systems. Alternatively, an inertial and magnetic measurement system (IMMS) can be applied for ambulatory motion-tracking. A protocol named Outwalk has recently been developed to measure the 3D kinematics(More)
BACKGROUND In children with spastic cerebral palsy, the range of motion of the ankle joint is often limited. Measurement of range of motion may be hampered by a non-rigid foot deformity. We constructed a hand-held instrument which allows measurements of static ankle angle and moment in children with cerebral palsy while correcting for foot deformity. This(More)
OBJECTIVE To quantify dynamic spasticity, i.e. the coupling between muscle-tendon stretch velocity and muscle activity during gait, of the gastrocnemius and soleus muscles in children with spastic cerebral palsy. DESIGN Prospective, cross-sectional study. SUBJECTS Seventeen ambulatory children with cerebral palsy with spastic calf muscles, and 11(More)
OBJECTIVE The aim of this study was to determine the test-retest reliability of the 20-sec Wingate anaerobic test in children with cerebral palsy. DESIGN Participants were 22 ambulant children with cerebral palsy, with Gross Motor Function Classification System levels I (limitations in advanced motor skills, n = 11), II (limitations in walking, n = 7),(More)
  • Rimke C Vos, Jules G Becher, Marjolijn Ketelaar, Dirk-Wouter Smits, Jeanine M Voorman, Siok Swan Tan +2 others
  • 2013
OBJECTIVES To describe the developmental trajectories of mobility performance and daily activities in children and young adults with cerebral palsy (CP). To explore the influence of gross motor function and intellectual disability on these trajectories. METHODS Four hundred and twenty-four Dutch participants with CP (aged 1-20 years at study onset) were(More)
During development, muscle growth is usually finely adapted to meet functional demands in daily activities. However, how muscle geometry changes in typically developing children and how these changes are related to functional and mechanical properties is largely unknown. In rodents, longitudinal growth of the pennate m. gastrocnemius medialis (GM) has been(More)
AIM to identify the use and utility of language comprehension tests for unintelligible or non-speaking children with severe cerebral palsy (CP). METHOD severe CP was defined as severe dysarthria (unintelligible speech) or anarthria (absence of speech) combined with severe limited mobility, corresponding to Gross Motor Function Classification System levels(More)
  • Sebastian Grunt, Petra J van Kampen, Marjolein M van der Krogt, Merel-Anne Brehm, Caroline A M Doorenbosch, Jules G Becher
  • 2010
PURPOSE To determine the reproducibility and validity of video screen measurement (VSM) of sagittal plane joint angles during gait. METHODS 17 children with spastic cerebral palsy walked on a 10m walkway. Videos were recorded and 3d-instrumented gait analysis was performed. Two investigators measured six sagittal joint/segment angles (shank, ankle, knee,(More)
Selective dorsal rhizotomy is an effective treatment for spasticity in children with cerebral palsy who have a spastic motor disorder. It is hypothesized that muscle shortening is related to spasticity; the lack of stretch of a muscle is thought to be the cause of muscle shortening. If this is true, the treatment for spasticity should prevent the occurrence(More)