Endings of Afferent Nerve Fibers. Golgi Tendon Organ or Neurotendinal Spindle
At the point of transition between a muscle and a tendon, sporadic Golgi tendon organs are found. Following silver staining, a rich ramification of sensory nerve fibers (Fig. A1) becomes evident. In the upper part of the drawing, striated skeletal muscle fibers (Fig. A2) penetrate the tendon organ. Below, the capsule, which is difficult to differentiate under the light microscope, with its inner collagen fibers is continuous with the tendon (Fig. A3). In Fig.B, the capsule has been opened to expose the interior of the tendon organ.