RECURRENT BRANCHES OF ABDUCENS NERVE 



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they are the only cells among the nerve fibers which throughout 

 the abducens are free from nuclei, except for the perineurium. 

 The end result is the total disappearance of the recurrent branch. 

 In one embryo I have seen a small group of phagocytes, present 

 in only three consecutive sections, clustered about two or three 

 scarcely recognizable nerve fibers. Only its position, along the 



Diagram A The floor of the medulla is seen in profile from the right side, 

 with the proximal ends of the glossopharyngeal, vagus, and hypoglossal nerves. 

 The main abducens points to the right, the recurrent branch to the left. In nos. 

 1, 2, and 3 the different courses of the recurrent branches are shown; to the 

 occipital somitic muscles, to the branchial muscles, accompanying either the 

 vagus or glossopharyngeal nerves, and to the postotic dorsal musculature, respec- 

 tively. No. 4 gives a variation showing a separate root for the recurrent branch. 

 No. 5 shows a degenerating recurrent branch so short that its destination is not 

 certain, and already disconnected from its nucleus in the medulla. 



