Proprioception means "sense of self". In the limbs, the proprioceptors are sensors that provide information about joint angle, muscle length, and tension, which is integrated to give information about the position of the limb in space. The muscle spindle is one type of proprioceptor that provides information about changes in muscle length. The Golgi tendon organ is another type of proprioceptor that provides information about changes in muscle tension;
http://courses.washington.edu/conj/bess/spindle/propriocepto...
Körpereigenfühler (Propriorezeptoren, die über die Lage des Körpers im Raum informieren - sie sind in Gelenken, Muskeln und Sehnen gelegen);
http://oe1.orf.at/110646.html;