Thirty sarcopenia patients showed reduced EMG activity and grip strength compared to 38 healthy controls, with functional near-infrared spectroscopy revealing distinct neural patterns across cognitive tasks. During working memory tasks, sarcopenic individuals exhibited lower activation in precentral, middle frontal, and superior frontal regions, while attention tasks triggered increased right-hemisphere activation suggesting compensatory brain recruitment. Notably, motor cortex responses during grip tasks remained similar between groups despite clear physical performance differences. The study establishes measurable correlations between cortical activity, grip strength, and Chair Stand Test performance, providing neurobiological evidence for the motor-cognitive connection in age-related muscle loss. These findings advance understanding of sarcopenia beyond simple muscle deterioration, positioning it as a condition affecting integrated brain-muscle communication networks. The compensatory neural activation patterns may represent early biomarkers for cognitive decline risk in sarcopenic adults. However, the modest sample size and cross-sectional design limit causal interpretations. As this preprint awaits peer review, the results require validation through larger longitudinal studies. The work represents an incremental but meaningful step toward understanding sarcopenia's neural underpinnings, potentially informing future interventions targeting both muscle and brain health simultaneously.