Fig. 5. Principle component scores from the intensity spectra from the ramped isometric contractions. The points denote the mean ± S.E.M. scores (30<N<50) for each force bin for the rectus femoris (open triangles), vastus lateralis (solid diamonds), vastus medialis (open diamonds), lateral gastrocnemius (solid circles), medial gastrocnemius (open circles) and soleus (open squares). The asterisks mark the 5–15% force bins, and the lines join sequentially higher force bins to the 85–95% bin.