Golgi tendon organ(GTO)•located near the musculotendinous junction, and transmits afferent stimuli via IIB fibers.•sensitive to tension in a muscle caused by either passive stretch or active muscle contraction•Autogenic inhibition: protective mechanism to inhibit tension in the muscle in which it lies•Low threshold for firing after an active muscle contraction and has a high threshold for firing with passive stretch•When excessive tension develops in a muscle the GTO fires, inhibit alpha motoneuron activity, and decreases tension in the muscle