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Fig. 2 | BMC Neurology

Fig. 2

From: Assessment and rehabilitation of central sensory impairments for balance in mTBI using auditory biofeedback: a randomized clinical trial

Fig. 2

CSMI methods with example data and analysis. (a) A feedback control model forms the basis for identifying model parameters (Table 2) that account for experimentally evoked body-in-space (BS) sway, representing angular tilt of the body center-of-mass (CoM), evoked by support surface (SS) and/or visual surround (VS) rotations. (b) An example of one cycle of a pseudorandom surface-tilt stimulus that evoked the CoM body sway (averaged across 5 stimulus cycles) shown in (c) for a Control subject and TBI subject. (d) Frequency domain analysis of stimulus/response data in (b) and (c) yields frequency response functions (FRFs) expressed as gain (ratio of CoM response amplitude to stimulus amplitude) and phase (timing of response relative to stimulus) measures as a function of frequency components in the pseudorandom stimulus. Parameters of the model in (a) are calculated by a fit procedure that finds parameters that optimally account for the FRF gain and phase data

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BMC Neurology

ISSN: 1471-2377

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