Fig. 7

Percentage of energy content in each frequency band under the EC condition. a Moderate-frequency band (1.56–6.25 Hz, proprioception and spinal reflexive loop). b Low-frequency band (0.39–1.56 Hz, cerebellar system). c Very-low-frequency band (0.1–0.39 Hz, vestibular system). d Ultralow-frequency band (< 0.1 Hz, visual system)