reciprocal inhibition, 1. the theory in behavior therapy that, if an anxiety-producing stimulus occurs simultaneously with a response that diminishes anxiety, the stimulus may cause less anxiety. For example, deep chest or abdominal breathing and relaxation of the deep muscles appear to diminish anxiety and pain in childbirth. See also systemic desensitization. 2. an early mobility phase that serves a protective function. The muscle acting on one side of a joint (agonist) quickly contracts while its opposite (antagonist) relaxes. An example is seen in infants who randomly flex and extend their arms and legs.
