IO4 



HISTOLOGY. 



containing many nuclei and staining more deeply than the surrounding 

 tendon. They are enclosed in sheaths of ordinary connective tissue. 



Medullated IMuscle 

 nerves. fibers. 



I K 



W \* Terminal ramification. Tendon bundle. f' 



SU3 \ ^ 



I I Q \ ^ 



-Medullated nerve fiber. 



Muscle fibers. 

 l\ 



FIG. 123. TENDON SPINDLE OF AN ADULT CAT. X 80. 



?_ Medullated 



nerve fiber. 



FIG. 124. THE LEFT PORTION OF FIG. 123. X 345. 



The few nerve fibers which terminate in a tendon spin- 

 dle lose their sheaths and branch freely, ending in club- 

 shaped enlargements (Figs. 123 and 124). They are 

 found in all tendons and serve to transmit the sensation 

 of tension, being active in connection with coordinated 

 movements. 



In connective tissue, sensory nerves may either end 

 free or surrounded with a connective tissue capsule. In 

 the subcutaneous tissue near the coils of the sweat 

 glands, and in the corium of the fingers and toes, there 

 are terminal cylinders [of Ruffini] which resemble tendon spindles in the 



FIG. 122. MUSCLE 

 SPINDLE OP AN 

 ADULT CAT. Xiss. 



