Recovery Trajectories From Surface Perturbations During Locomotion

Sienko, Kathleen H.; Balkwill, M. David; Oddsson, Lars; Wall, Conrad

doi:10.1016/s0021-9290(08)70027-7

Cited by 1 publication

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“…The COP data were then exported from the Nexus software and outcome measures were calculated. Similar to previous studies ( Sienko et al, 2008 ; Lee et al, 2012 ), we applied a low pass filter with a 2nd order recursive Butterworth filter with a cutoff of 10 Hz. For each balance trial, we fitted a 95% confidence interval ellipse to the anterior-posterior and medial-lateral trajectories.…”

Section: Discussionmentioning

confidence: 99%

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Age Differences in Vestibular Brain Connectivity Are Associated With Balance Performance

Noohi

Kinnaird

Dios

et al. 2020

Front. Aging Neurosci.

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Visual and auditory brain network connectivity decline with age, but less is known about age effects on vestibular functional connectivity and its association with behavior. We assessed age differences in the connectivity of the vestibular cortex with other sensory brain regions, both during rest and during vestibular stimulation. We then assessed the relationship between vestibular connectivity and postural stability. A sample of seventeen young and fifteen older adults participated in our study. We assessed the amount of body sway in performing the Romberg balance task, with degraded somatosensory and visual inputs. The results showed no significant difference in balance performance between age groups. However, functional connectivity analyses revealed a main effect of age and condition, suggesting that vestibular connectivity was higher in young adults than older adults, and vestibular connectivity increased from resting state to stimulation trials. Surprisingly, young adults who exhibited higher connectivity during stimulation also had greater body sway. This suggests that young adults who exhibit better balance are those who respond more selectively to vestibular inputs. This correlation is non-significant in older adults, suggesting that the relationship between vestibular functional connectivity and postural stability differs with age.

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Section: Discussionmentioning

confidence: 99%

“…We calculated the amount of body sway as the area of an ellipse fit to the 95th percentile confidence interval of center of pressure motion in the anterior-posterior and medial-lateral directions ( Sienko et al, 2008 ; Lee et al, 2012 ). Better postural stability was reflected as less body sway and smaller ellipse size.…”

Section: Methodsmentioning

confidence: 99%