Muscle tendon spindle (Organ of Golgi) found at the junction of muscle and tendon spindle shaped composed of tendon bundles covered by a connective tissue capsule.
Into this enter one or several afferent nerve fibres which terminate in arborization around bundles.
Muscle spindles and muscle tendon spindles are proprioceptors of position and movement receiving stimuli due to constant or varying tensions of voluntary muscle and their attached tendons.