FLEXOR MUSCLE By N., Pam M.S. - May 11, 2013 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 ISOTONIC CONTRACTION STRETCH REFLEX FLEXION SKELETAL MUSCLE MUSCLE TWITCH EXTRAFUSAL FIBER SCAPULAR REFLEX ISOMETRIC CONTRACTION TONIC FIBRILLATION Cite this page: N., Pam M.S., "FLEXOR MUSCLE," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/flexor-muscle/ (accessed August 7, 2020).