HuBER, Sympathetic Nervous System. 133 



sympathetic root. I refer here more especially to the sympa- 

 thetic ganglia in connection with some of the cranial nerves. 

 If we take for instance the ciliary ganglion, to which your at- 

 tention has previously been drawn, we find it generally stated, 

 that it receives its motor root from the 3rd cranial nerve, its 

 sensory root from the nasal branch of the ophthalmic and its 

 sympathetic root from the cavernous plexus of the sympathetic. 

 I have tried to show you that the motor root, consisting of 

 small meduUated fibers, ends in the ganglion in peri-cellular bas- 

 kets. The sensory root, when viewed in the light of our more 

 modern ideas of the structure of the nervous system has no 

 connection, by that of course is meant no histological connec- 

 tion, with the ganglion. It is doubtful whether the sympathetic 

 root really forms any connection with the ganglion ; some of its 

 fibers may end free on the dendrites of the sympathetic neurons 

 constituting the ganglion. Or if we take the so-called sub-maxil- 

 lary ganglion, Quain states: "The posterior connecting branch 

 from the lingual nerve, often broken up into two or three fila- 

 ments, conveys to the ganglion fibers from the chorda tympani 

 andinferi or maxillary nerves and thus represents the motor 

 and sensory roots of the ganglion. The sympathetic root is 

 formed by slender twigs from the plexus on the facial artery." 

 Langley (94) has shown (by his nicotin method) that some of 

 the chorda tympani fibers end in this ganglion, and I have en- 

 deavored to show that such fibers end in peri-cellular baskets. 

 The sensory fibers no doubt pass through the ganglion to end 

 in some of the larger gland ducts. I infer this from the fact 

 that some of the larger meduUated fibers pass through the gan- 

 glia without ending therein ; similar meduUated fibers are found 

 by the side of the larger gland ducts. They are no doubt 

 sensory fibers, as some of them end free in the epithehum of 

 the ducts. It may also be stated that Langley finds meduUated 

 fibers, 7 to \o ^ in diameter in the plexus surrounding the 

 sub-maxillary duct. These fibers were seen branching. On 

 general grounds he thinks they are sensory fibers. We have 

 no reason to assume that the fibers of the sympathetic root 



