Fig. 4From: Virtual reality and motor imagery for early post-stroke rehabilitationSpectral entropy scalp maps of stroke patients 2, 3, 8 and 10 (top row to bottom row) for frequencies 1–40 Hz showing the intensity variations normalised relative to classes from Experiments 1 and 2, respectively. Red is 1 = maximum; blue is – 1 = minimumBack to article page