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Coherence area estimates. Logarithmic coherence area in alpha (5–15 Hz), beta (15–35 Hz), low (15–25 Hz), and high (25–35 Hz) beta during static dorsiflexion (a) and plantar flexion (b) for young and old subjects. Significant differences between young and old groups are indicated by ∗p < 0.05; ∗∗p < 0.01; ∗∗∗p < 0.001; #p < 0.1. TAprox: proximal end of anterior tibial; TAdist: distal end of anterior tibial; SOL: soleus; GM: medial gastrocnemius.
