Chris J. Hass
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View article: Age differences in electrocortical dynamics during uneven terrain walking
Age differences in electrocortical dynamics during uneven terrain walking Open
Walking on uneven terrain becomes more difficult as we age, and gait becomes less automatic. Using mobile brain imaging via high-density electroencephalography (EEG) can provide insight into the neural mechanisms contributing to reduced mo…
View article: Gait speed-related changes in electrocortical activity in younger and older adults
Gait speed-related changes in electrocortical activity in younger and older adults Open
Older and younger adults show widespread EEG beta power decreases at faster walking speeds compared to slower walking speeds. Older adults differentially alter EEG theta power while walking compared to younger adults. Prior studies with fu…
View article: Resting state brain network segregation is associated with walking speed and working memory in older adults
Resting state brain network segregation is associated with walking speed and working memory in older adults Open
Older adults exhibit larger individual differences in walking ability and cognitive function than young adults. Characterizing intrinsic brain connectivity differences in older adults across a wide walking performance spectrum may provide …
View article: Individual joint contributions to forward propulsion are not related to stability during walking in young or older adults
Individual joint contributions to forward propulsion are not related to stability during walking in young or older adults Open
Our results suggest prioritizing mediolateral stability is a potential explanation for, or consequence, of the age- and function-related shift toward proximal joint contributions to forward propulsion during walking.
View article: Resting state brain network segregation is associated with walking speed and working memory in older adults
Resting state brain network segregation is associated with walking speed and working memory in older adults Open
Older adults exhibit larger individual differences in walking ability and cognitive function than young adults. Characterizing intrinsic brain connectivity differences in older adults across a wide walking performance spectrum may provide …
View article: Prefrontal cortical activity during uneven terrain walking in younger and older adults
Prefrontal cortical activity during uneven terrain walking in younger and older adults Open
Introduction Walking in complex environments increases the cognitive demand of locomotor control; however, our understanding of the neural mechanisms contributing to walking on uneven terrain is limited. We used a novel method for altering…
View article: Electrical brain activity during human walking with parametric variations in terrain unevenness and walking speed
Electrical brain activity during human walking with parametric variations in terrain unevenness and walking speed Open
Mobile brain imaging with high-density electroencephalography (EEG) can provide insight into the cortical processes involved in complex human walking tasks. While uneven terrain is common in the natural environment and poses challenges to …
View article: Electrical Brain Activity during Human Walking with Parametric Variations in Terrain Unevenness and Walking Speed
Electrical Brain Activity during Human Walking with Parametric Variations in Terrain Unevenness and Walking Speed Open
Mobile brain imaging with high-density electroencephalography (EEG) can provide insight into the cortical processes involved in complex human walking tasks. While uneven terrain is common in the natural environment and poses challenges to …
View article: Uneven terrain versus dual-task walking: differential challenges imposed on walking behavior in older adults are predicted by cognitive and sensorimotor function
Uneven terrain versus dual-task walking: differential challenges imposed on walking behavior in older adults are predicted by cognitive and sensorimotor function Open
Aging is associated with declines in walking function. To understand these mobility declines, many studies have obtained measurements while participants walk on flat surfaces in laboratory settings during concurrent cognitive task performa…
View article: Comparison of EEG source localization using simplified and anatomically accurate head models in younger and older adults
Comparison of EEG source localization using simplified and anatomically accurate head models in younger and older adults Open
Accuracy of electroencephalography (EEG) source localization relies on the volume conduction head model. A previous analysis of young adults has shown that simplified head models have larger source localization errors when compared with he…
View article: Comparison of EEG source localization using simplified and anatomically accurate head models in younger and older adults
Comparison of EEG source localization using simplified and anatomically accurate head models in younger and older adults Open
Accuracy of electroencephalography (EEG) source localization relies on the volume conduction head model. A previous analysis of young adults has shown that simplified head models have larger source localization errors when compared with he…
View article: Comparison of EEG Source Localization Using Simplified and Anatomically Accurate Head Models in Younger and Older Adults
Comparison of EEG Source Localization Using Simplified and Anatomically Accurate Head Models in Younger and Older Adults Open
Accuracy of electroencephalography (EEG) source localization relies on the volume conduction head model. A previous analysis of young adults has shown that simplified head models have larger source localization errors when compared with he…
View article: Uneven terrain treadmill walking in younger and older adults
Uneven terrain treadmill walking in younger and older adults Open
We developed a method for altering terrain unevenness on a treadmill to study gait kinematics. Terrain consisted of rigid polyurethane disks (12.7 cm diameter, 1.3–3.8 cm tall) which attached to the treadmill belt using hook-and-loop faste…
View article: Neural correlates of gait adaptation in younger and older adults
Neural correlates of gait adaptation in younger and older adults Open
Mobility decline is a major concern for older adults.A key component of maintaining mobility with advancing age is the ability to learn and adapt to the environment.The split-belt treadmill paradigm is an experimental protocol that tests t…
View article: Locomotor Adaptation Training to Prevent Mobility Disability
Locomotor Adaptation Training to Prevent Mobility Disability Open
Mobility disability is prevalent in aging populations. While existing walking interventions improve aspects related to mobility, meaningful and sustained changes leading to preventing and reversing mobility disability have remained elusive…
View article: Locomotor Adaptation Training to Prevent Mobility Disability: Dataset
Locomotor Adaptation Training to Prevent Mobility Disability: Dataset Open
Data for 3 groups of older adults at risk of mobility disability (1: control, 2: traditional treadmill intervention, 3: split-belt treadmill intervention) were collected at 2 timepoints 1) prior (PRE) and 2) following (POST) a 16-week inte…
View article: Locomotor Adaptation Training to Prevent Mobility Disability: Dataset
Locomotor Adaptation Training to Prevent Mobility Disability: Dataset Open
Data for 3 groups of older adults at risk of mobility disability (1: control, 2: traditional treadmill intervention, 3: split-belt treadmill intervention) were collected at 2 timepoints 1) prior (PRE) and 2) following (POST) a 16-week inte…
View article: Differential Relationships Between Brain Structure and Dual Task Walking in Young and Older Adults
Differential Relationships Between Brain Structure and Dual Task Walking in Young and Older Adults Open
Almost 25% of all older adults experience difficulty walking. Mobility difficulties for older adults are more pronounced when they perform a simultaneous cognitive task while walking (i.e., dual task walking). Although it is known that agi…
View article: Uneven terrain treadmill walking in younger and older adults
Uneven terrain treadmill walking in younger and older adults Open
We developed a method for altering terrain unevenness on a treadmill to study gait kinematics. Terrain consisted of rigid polyurethane disks (12.7 cm diameter, 1.3-3.8 cm tall) which attached to the treadmill belt using hook-and-loop faste…
View article: Sensory system-specific associations between brain structure and balance
Sensory system-specific associations between brain structure and balance Open
Nearly 75% of older adults in the United States report balance problems. Balance difficulties are more pronounced during sensory feedback perturbation (e.g., standing with the eyes closed or on foam). Although it is known that aging result…
View article: Differential relationships between brain structure and dual task walking in young and older adults
Differential relationships between brain structure and dual task walking in young and older adults Open
Almost 25% of all older adults experience difficulty walking. Mobility difficulties for older adults are more pronounced when performing a simultaneous cognitive task while walking (i.e., dual task walking). Although it is known that aging…
View article: Age differences in adaptation of medial-lateral gait parameters during split-belt treadmill walking
Age differences in adaptation of medial-lateral gait parameters during split-belt treadmill walking Open
The split-belt treadmill (SBT) has been used to examine the adaptation of spatial and temporal gait parameters. Historically, SBT studies have focused on anterior-posterior (AP) spatiotemporal gait parameters because SBT is primarily a per…