FLEXOR MUSCLE By N., Sam M.S. - 2 the name that is given to the muscle whose contraction will cause a bend of a limb. An example is the biceps in the upper arm. Compare extensor muscle. FLEXOR MUSCLE: "Our bicep is an example of a flexor muscle." Related Psychology Terms PHANTOM REACTION SOCIAL CLASS (Social Stratification) FLEXION ISOTONIC CONTRACTION EFFECTORS TONIC LABYRINTH REFLEX ANTISOCIAL REACTION CREATIVITY TESTS STRETCH REFLEX PHANTOM LIMB Cite this page: N., Sam M.S., "FLEXOR MUSCLE," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/flexor-muscle/ (accessed February 6, 2023).