antagonistic muscle

I think the proper word is, and biologists will correct me if I'm wrong, antagonistic muscles.

In fish this forward propulsion does not require contraction of the antagonistic muscle, but results from the body stiffness and the hydrodynamic resistance of the tail.

If uncorrected, the antagonistic muscles eventually become involved as well, leading to dysfunction of both muscle groups.

However, antagonistic muscles are activated.

However, it is actually thought to be caused by the tendon reflex of the antagonistic muscle of that joint, which gets extended.

The amplitude of movements are based upon the antagonistic muscles forces and the amount of leverage the antagonistic muscle provides for movement.

The bending of a muscular hydrostat can occur in two ways, both of which require the use of antagonistic muscles.

These, in turn, synapse with motor neurons leading back to the antagonistic muscle, a flexor in the back of the thigh.

During flight, these function as antagonistic muscles to produce the wing flapping that allows for sustained flight.

The circular muscles and longitudinal muscles are antagonistic muscles, with one contracting as the other relaxes.