Answer:
Golgi tendon organ
Explanation:Golgi Tendon Organ(GTO) (also called Golgi organ or neurotendinous spindle) is a sensory receptor organ that sense changes in tension of muscles.
They are located in the tendon close to the point of muscular attachment. Each Golgi tendons consist of a thin capsule of connective tissues that encloses a collagen containing fibre.
Golgi Tendon Organ is involved in the cerebellar regulation of movement and are activated by stretching or contraction of muscles