Abstract <p>Neuronal control of postural muscle performance involves theintegrated regulation of α-motor neuron activity based on the principleof competing incoming signals from receptors of different modalitiesand localizations (Sherrington’s funnel). In this context, the questionarises as to which afferent signal—support signal, reciprocal interaction,or vestibular system signal—is dominant in regulating postural muscleactivity. To address this question, we analyzed the pool of experimentalstudies from the last 20 years, focusing on the soleus muscle, theprimary postural control muscle responsible for maintaining an uprightbody position. Analysis of the literature indicates that among afferentinfluences, support activation of deep cutaneous mechanoreceptors exertsthe dominant effect on the morphofunctional organization of thesoleus muscle. Under stable support conditions, the mechanisms ofproprioception and reciprocal inhibition get involved in postural controlregulation. Vestibular afferentation, despite its integral rolein postural management through analyzing support stability, exertspredominantly a secondary modulatory effect on postural muscle activity.</p>