S. M. Bruijn

Vertebral level specific modulation of paraspinal muscle activity based on vestibular signals during walking.

This study examines how vestibular signals modulate paraspinal muscle activity at different vertebral levels during walking, finding vertebral-specific responses and coordinated patterns.

Force-field perturbations and muscle vibration strengthen stability-related foot placement responses during steady-state gait

This study investigates how force-field perturbations and muscle vibration affect foot placement control during gait, finding that sensory augmentation leads to an after-effect but combining it with force-field perturbations does not enhance the effect further.

Mediolateral foot placement control can be trained: Older adults learn to walk more stable, when ankle moments are constrained

This study trains older adults to improve mediolateral foot placement control using restricted shoes, resulting in reduced foot placement errors and increased gait stability.

External validation and further exploration of fall prediction models based on questionnaires and daily-life trunk accelerometry

The paper externally validates fall prediction models using trunk accelerometry and questionnaires, finding limited improvement in accuracy despite recalibration and parameter optimization.

A formula for calculating 30-item Geriatric Depression Scale (GDS-30) scores from the 15-item version (GDS-15)

The paper develops a formula to convert GDS-15 scores to GDS-30 scores using a dataset of older adults, finding that multiplying by 2 is inaccurate and providing an alternative formula with higher explained variance.

Phase-dependent gait robustness is not related to phase-dependent gait stability

The paper shows that phase-dependent stability measures in a compass walker model do not predict gait robustness or fall risk.

The energetic effect of hip flexion and retraction in walking at different speeds: a modeling study

This study models how hip flexion and retraction affect energy cost in walking at different speeds, finding that asymmetric hip actuation reduces metabolic cost of transport by up to 6% at medium speeds.

Differential effects of ankle constraints on foot placement control between normal and split belt treadmills

This study shows that ankle moment constraints increase step width more on split-belt treadmills than normal treadmills and reduce foot placement control only on split-belt treadmills.

The effect of external lateral stabilization on ankle moment control during steady-state walking

This study examines how external lateral stabilization affects ankle moment control during walking, finding reduced contribution of ankle moments to stability without changing foot placement error or center-of-pressure shift.

Limited effects of age on the use of the ankle and counter-rotation mechanism in the sagittal plane

This study assesses age-related differences in postural control mechanisms during standing, finding that children and older adults show poorer balance performance, with the CoP mechanism dominating over the counter-rotation mechanism.

Does ankle push-off correct for errors in anterior-posterior foot placement relative to center-of-mass states?

This study investigates whether ankle push-off corrects for errors in anterior-posterior foot placement during steady-state walking, finding a correlation between push-off torque and foot placement error.

The effect of constraining mediolateral ankle moments and foot placement on the use of the counter-rotation mechanism during walking

This study examines how humans use the counter-rotation mechanism to control the center of mass during walking under different constraints, finding it compensates for reduced CoP-mechanism control in specific conditions.

Effects of age and surface instability on the control of the center of mass

This study evaluates mediolateral balance performance and postural control mechanisms in children, young adults, and older adults on stable and unstable surfaces, finding age-related differences in CoM acceleration and mechanism contributions.

Can foot placement during gait be trained? Adaptations in stability control when ankle moments are constrained

This study investigates whether constraining ankle moments during walking can improve foot placement control, finding initial deterioration followed by a non-significant trend toward improvement after prolonged exposure.

Contribution of arm movements to balance recovery after tripping in older adults.

This study examines how arm movements affect balance recovery after tripping in older adults, finding no significant differences between fallers and non-fallers in arm movement effects.

Differences in gait stability and acceleration characteristics between healthy young and older females

This study compares gait stability and acceleration characteristics between healthy young and older females using inertial sensors, finding older females exhibit less stability and more variability in trunk and foot movements.