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. 2018 Mar 28;120(1):88–104. doi: 10.1152/jn.00084.2018

Fig. 6.

Fig. 6.

A: The neural control of a pair of opposing muscles can be described as a combination of λ values for the agonist (λAG) and antagonist (λANT) muscles. Alternatively, it can be described with the reciprocal command (r) and the coactivation command (c). B: formally, c-command can be negative when there is a range of joint angle where both muscles are quiescent.