A preliminary cross-sectional assessment of postural control responses to continuous platform rotations following a sport-related concussion.

Abstract:

BACKGROUND:Individuals suffering a sport-related concussion typically recover within 1 month; however, persistent post-concussive symptoms are known to occur beyond this period. Clinical guidelines may not be sufficient to determine if dynamic postural control is still impaired at the point of the return to play decision. RESEARCH QUESTION:Do individuals with a previous sport-related concussion who have returned to play show differences in postural control compared to individuals without a previous concussion, in response to continuous platform perturbations? METHODS:Eight previously concussed and eight age- and position-matched participants completed six one-minute trials (three with eyes open/closed) whilst stood on a moving platform that rotated about the pitch axis with a peak-to-peak amplitude of 4° at a frequency of 0.8 Hz. Six trials were also captured during static quiet stance for comparison. Reactive and anticipatory stages of postural control were analysed by determining anteroposterior margins of stability (MoS) as a measure of whole-body postural control and head-to-trunk anchoring index as an indication of the head-trunk segmental coupling strategy. RESULTS:Posterior MoS during platform rotations reduced for both groups during eyes closed trials, but previously concussed participants exhibited a significantly greater reduction (1.97 cm) in comparison to matched-controls (0.34 cm). Participants, regardless of group, showed a preference towards a head-stabilised-to-trunk strategy during platform rotations. There were no differences during static trials. SIGNIFICANCE:This preliminary study suggests previously concussed athletes demonstrate a greater reduction in postural control whilst undergoing continuous platform rotations with eyes closed, which could indicate possible lingering deficits to other sensory systems such as the vestibular system, though participants were not likely to lose their balance.

journal_name

Gait Posture

journal_title

Gait & posture

authors

Bailey HGB,Kirk C,Mills RS,Foster RJ

doi

10.1016/j.gaitpost.2020.08.105

subject

Has Abstract

pub_date

2020-09-01 00:00:00

pages

213-217

eissn

0966-6362

issn

1879-2219

pii

S0966-6362(20)30494-X

journal_volume

81

pub_type

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