OTIC AND SUBMAXILLARY GANGLIA. 



609 



thetic by a filament from the plexus on the middle meningeal artery. 

 It likewise receives the small superficial petroaal nerve, which emerges 

 from the petrous bone by the small foramen internal to the canal of the 

 tensor tympani muscle, and reaches the exterior of the skull by piercing 

 the sphenoid bone close to the foramen spinosum. By this nerve the 

 ganglion forms a communication with the glosso-pharyngeal and facial 

 nerves. 



Fig. 410. OTIC GANGLTOV Fig. 410. 



AKD ITS CONNECT ONS 

 FKOM THE INSIDE ( lorn 

 Sappey after Arnold). 



This figure exhibits a 

 view of the lateral portion 

 of the skull with a part of 

 the nasal fossa and lower 

 jaw of the right side ; the 

 petrous bone has been re- 

 moved so as to show the 

 inner surface of the mein- 

 brana tympani and the 

 canal of the facial nerve. 



1, smaller motor root of 

 the fifth nerve passing 

 down on the inside of the 

 Gasserian ganglion to unite 

 with the inferior maxillary 

 division; 2, inferior denial 

 nerve entering the canal of 

 the lower jaw ; 3, njylo- 

 hyoid branch, seen also 

 farther down emerging m 

 front of the internal ptery- 

 goid muscle ; 4, lingual or gustatory nerve ; 5, chorda tympani ; 6, facial nerve in its 

 canal ; 7, auriculo-temporal nerve, enclosing in its loop of origin the middle meningeal 

 artery; 8, otic ganglion; 9, small superficial petrosal nerve joining the ganglion ; 10, 

 branch to the tensor tympani muscle ; 11, twig connecting the ganglion with the temporo- 

 auricular nerve ; 12, twig to the ganglion from the sympathetic nerves on the meningeal 

 artery ; 13, branch to the internal pterygoid muscle ; 14, branch to the tensor palati 

 muscle. 



Branches. Two small nerves are distributed to muscles one to the 

 tensor of the membrane of the tympanum, the other to the circumflexus or 

 tensor palati. 



SUBMAXILLARY GANGLION. 



The submaxillary ganglion is placed above the deep portion of the sub- 

 maxillary gland, and is connected by filaments with the gustatory nerve. 

 It is about the size of the ophthalmic ganglion. By the upper part or 

 base it receives branches from nerves which may be regarded as its roots, 

 whilst from the lower part proceed the filaments which are distributed from 

 the ganglion. 



Connection with nerves roots. This ganglion receives filaments from 

 the gustatory nerve, and likewise, at its back part, a root which appa- 

 rently comes from the gustatory nerve, but is in reality derived from the 

 chorda tympani, which is prolonged downwards in the sheath of the 

 gustatory nerve. It receives also small twigs from the sympathetic filaments 

 on the facial artery. 



Branches. Some nerves, five or six in number, radiate to the substance 



