904 



NEUROLOGY 



The Nerve to the Stapedius (n. stapedius; tympanic branch] arises opposite tfie 

 pyramidal eminence (page 1042) ; it passes through a small canal in this eminence 

 to reach the muscle. 



The Chorda Tympani Nerve is given off from the facial as it passes downward 

 behind the tympanic cavity, about 6 mm. from the stylornastoid foramen. It 

 runs upward and forward in a canal, and enters the tympanic cavity, through an 

 aperture (iter chordae posterius) on its posterior wall, close to the medial surface 

 of the posterior border of the tympanic membrane and on a level with the upper 





Termination 

 of supratrochlear 

 of infratroctilear 

 of nasociliary 



FIG. 790. The nerves of the scalp, face, and side of neck. 



end of the manubrium of the malleus. It traverses the tympanic cavity, between 

 the fibrous and mucous layers of the tympanic membrane, crosses the manubrium 

 of the malleus, and emerges from the cavity through a foramen situated at the inner 

 end of the petrotympanic fissure, and named the iter chordae anterius (canal of 

 Huguier}. It then descends between the Pterygoideus externus and internus on 

 the medial surface of the spina angularis of the sphenoid, which it sometimes 

 grooves, and joins, at an acute angle, the posterior border of the lingual nerve. 

 It receives a few efferent fibers from the motor root; these enter the submaxillary 

 ganglion, and through it are distributed to the submaxillary and sublingual glands; 



