68 



PSYCHOBIOLOGY 



Muscle spindles occur in the muscles generally, except in the tongue, 

 where none have yet been discovered. Evans has found them to be especi- 



FlG. 56. A Ruffini's nerve ending. Highly magnified. (Barker, Nervous System, 

 after Ruffini.) The ramifications of the nerve fiber gH are enclosed in the connec- 

 tive-tissue capsule L. 



ally numerous in the eye-muscles. They are from 1 to 5 or more mm. in 

 length, and 1 to 3 mm. in the broadest parts. 



RUFF1NI S ENDINGS. 



These are end organs lying at the junction of the corium and the sub- 

 cutaneous connective tissue of the fingers and toes, and also deeper in the 



