TY - GEN A1 - Hausmann, Peter A1 - Daumer, Martin A1 - MacNeilage, Paul R. A1 - Glasauer, Stefan T1 - Ecological momentary assessment of head motion: Towards normative data of head stabilization T2 - Frontiers in Human Neuroscience N2 - Head stabilization is fundamental for balance during locomotion but can be impaired in elderly or diseased populations. Previous studies have identified several parameters of head stability with possible diagnostic value in a laboratory setting. Recently, the ecological validity of measures obtained in such controlled contexts has been called into question. The aim of this study was to investigate the ecological validity of previously described parameters of head stabilization in a real-world setting. Ten healthy subjects participated in the study. Head and trunk movements of each subject were recorded with inertial measurement units (IMUs) for a period of at least 10 h. Periods of locomotion were extracted from the measurements and predominant frequencies, root mean squares (RMSs) and bout lengths were estimated. As parameters of head stabilization, attenuation coefficients (ACs), harmonic ratios (HRs), coherences, and phase differences were computed. Predominant frequencies were distributed tightly around 2 Hz and ACs, HRs, and coherences exhibited the highest values in this frequency range. All head stability parameters exhibited characteristics consistent with previous reports, although higher variances were observed. These results suggest that head stabilization is tuned to the 2 Hz fundamental frequency of locomotion and that previously described measures of head stability could generalize to a real-world setting. This is the first study to address the ecological validity of these measures, highlighting the potential use of head stability parameters as diagnostic tools or outcome measures for clinical trials. The low cost and ease of use of the IMU technology used in this study could additionally be of benefit for a clinical application. Y1 - 2019 U6 - https://doi.org/10.3389/fnhum.2019.00179 SN - 1662-5161 VL - 13 ER - TY - GEN A1 - Glasauer, Stefan A1 - Hausmann, Peter A1 - MacNeilage, Paul R. T1 - Statistics of natural head motion suggest different head motion priors for rest and movement T2 - Bernstein Conference 2018 Y1 - 2018 U6 - https://doi.org/10.12751/nncn.bc2018.0132 ER -