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Mean values and standard deviation of onset latencies (A) and amplitudes (B) of EMG activity in biceps femoris, rectus femoris, tibialis anterior and gastrocnemius medialis muscles in response to an obstacle for no startle and startle trials. Obstacle release phases were late stance (LSt), early swing (ESw) and mid-swing (MSw). *P < 0.05 between startle and no startle conditions.
