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Browsing EM - ESSEM - Fisioterapia by Author "Sousa, Laís Karielly Rodrigues de"
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- Comparison of cortical drive and muscle power in older adults with and without fear of falling : a comparative cross-sectional studyPublication . Sousa, Laís Karielly Rodrigues de; Radaelli, RégisIntroduction: Fear of falling (FoF) is a psychological factor that contributes to physical inactivity, social withdrawal, and increased fall risk. Previous evidence suggests age-related changes in cortical drive and muscle power. However, there is a lack of knowledge on how these changes affect FoF. This study aimed to compare corticospinal excitability (CSE), short-interval intracortical inhibition (SICI), intracortical facilitation (ICF), silent period (SP) and lower-limb muscle power between older adults with and without FoF. Methods: Eighteen communitydwelling older adults (g65 years old) participated and were classified into two groups based on the Falls Efficacy Scale International (FES-I): NFoF (score <28; n=10) and FoF (score g28; n=8). Cortical drive was assessed using Transcranial Magnetic Stimulation (TMS), with measures of active motor threshold (AMT), CSE, SICI, ICF. Lower-limb muscle power was measured via countermovement jump on a force platform. Physical activity levels were evaluated using the IPAQ-short form. Results: Groups were similar in age, BMI, and height. Participants with FoF had significantly more falls in the past 12 months (p=0.006). No statistically significant differences were found between groups for AMT (p=0.864), CSE (p=0.565), ICF (p=0.999), SICI (p=0.355) or SP (p=0.667). Physical activity levels did not differ significantly between older adults with and without FoF (p=0.342; §= 0.325). No statistically significant differences were found in absolute or relative muscle power between groups (p=0.141; d=0.735 and p=0.150; d=0.717, respectively). Conclusion: The FoF does not appear to influence neurophysiological parameters or lower-limb muscle power in this sample of older adults.