TY - JOUR
T1 - Postural orientation
T2 - Age-related changes in variability and time-to-boundary
AU - Van Wegen, E. E.H.
AU - Van Emmerik, R. E.A.
AU - Riccio, G. E.
PY - 2002
Y1 - 2002
N2 - The relation between age-specific postural instability and the detection of stability boundaries was examined. Balance control was investigated under different visual conditions (eyes open/closed) and postural orientations·(forward/backward lean) while standing on a force platform. Dependent variables included center of pressure variability and the time-to-contact of the center of pressure with the stability boundaries around the feet (i.e., time-to-boundary). While leaning maximally, older individuals (ages 55-69) showed increased center of pressure variability compared to no lean, while younger subjects (ages 24-38) showed a decrease. These significant differences were found only in anterior-posterior direction. No significant age-specific differences were found between eyes open and eyes closed conditions. Time-to-boundary analysis revealed reduced spatio-temporal stability margins in older individuals in both anterior-posterior and medio-lateral directions. Time-to-boundary variability, however, was not significantly different between the groups in both medio-lateral and anterior-posterior direction. These results show the importance of boundary relevant center of pressure measures in the study of postural control, especially concerning the lateral instability often observed in older adults.
AB - The relation between age-specific postural instability and the detection of stability boundaries was examined. Balance control was investigated under different visual conditions (eyes open/closed) and postural orientations·(forward/backward lean) while standing on a force platform. Dependent variables included center of pressure variability and the time-to-contact of the center of pressure with the stability boundaries around the feet (i.e., time-to-boundary). While leaning maximally, older individuals (ages 55-69) showed increased center of pressure variability compared to no lean, while younger subjects (ages 24-38) showed a decrease. These significant differences were found only in anterior-posterior direction. No significant age-specific differences were found between eyes open and eyes closed conditions. Time-to-boundary analysis revealed reduced spatio-temporal stability margins in older individuals in both anterior-posterior and medio-lateral directions. Time-to-boundary variability, however, was not significantly different between the groups in both medio-lateral and anterior-posterior direction. These results show the importance of boundary relevant center of pressure measures in the study of postural control, especially concerning the lateral instability often observed in older adults.
KW - Aging
KW - Balance
KW - Postural stability
KW - Time-to-boundary
KW - Variability
UR - http://www.scopus.com/inward/record.url?scp=0036010740&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036010740&partnerID=8YFLogxK
U2 - https://doi.org/10.1016/S0167-9457(02)00077-5
DO - https://doi.org/10.1016/S0167-9457(02)00077-5
M3 - Article
C2 - 11983434
SN - 0167-9457
VL - 21
SP - 61
EP - 84
JO - Human movement science
JF - Human movement science
IS - 1
ER -