7;u 



nil- \i /,-r/x 



6. INFERIOR LARYNOEAL NERVE (Fig. 302, 27, 28). Also named the 

 recurrent, or trit<-l/< a/ i-'-i-nn; at, }'(-.\\\f i' its disposition. It begins in tlio 

 thoracic cavity and ascends along the traelit :t to (lie larynx, all of \V!IOM- 

 intrinsic muscles it animates, with the exception of tho crico-thyroid. 



The two recurrent nerves 



Fig. 341. arc not quite symmetrical 



at their origin. That of tlio 

 right side is detached from 

 tho pneuniogastric below tho 

 axillary artery, nearly ut the 

 dorBO-cervieal arterial trunk. 

 It is immediately reflected 

 forward in embracing the 

 origin of that trunk, which 

 it crosses inwards to bo 

 placed against the trarhe:i, 

 in the middle of tho prin- 

 cipal cardiac nerves, with 

 some of which it contracts 

 intimate adherences. 



On the left side, it is 

 only when the pneumogas- 

 tric nerve arrives near the 

 root of the lung that it 

 gives off its recurrent. To 

 be reflected forward, the 

 latter turns from loft to 

 right behind the arch of 

 the aorta, and arrives be- 

 neath the inferior face of 

 the trachea, among tho 

 cardiac nerves, with which 

 it communicates like tho 



DISTRIBUTION OF THK NKUVKS IN THE LARYNX OF THE tight. 



HORSE. The inferior laryngeal 



a, Base of the tongue; 6, Epiglottis; c, Arytcnoid nerves are in this way 



muscles; d, Section of the thyroid cartilage to show mixed at a greater or less 



the parts it covers ; <?, Cricoid cartilage ; /, Trachea : j . 



V,(Ksophagus; h, Thyro-arytenoid muscle; \ Lateral Distance from thoir COm- 



crico-arytenoid muscle; .;, Posterior crico-ai -yt.-iK.id mencement, With those sym- 



muscle; k, Arytenoid muscle. 1, Superior laryngeal pathetic nervous branches 



nerve ; 2, Inferior laryngeal ; 3, Branches of the supc- w hich collectively Constitute 



rior laryngeal passing to the epiglottis and tongue ; 4, ft trftcheftl ploxug . TJ 

 Branches of the superior laryngeal passing to the -, , J 



wsophagus ; 5, Very fine multiple anastomoses between aro soou Disengaged, Jmw- 



the two laryngeals; 6, Trarhonl branches ; 7, Branch ever, and leave the chest, 



to the posterior crico-arytenoid muscle ; a portion is but always in proceeding 



distributed, through the muscles, to tli.- sulijai-eut a l ong tho inferior face of 



mucous membrane ; LO, Branch pauiiur to the arytenoid ,, j- 



muscle; 11, &&*&* >>nch of" the phamgMl the trachcuv, then ascending 



nerve; it sometimes mines from the external laryn- on its Sides, below the ca- 



geal. From Toussaint's work. rotid arteries, which they 



gradually approach, and 



finally attain the larynx in penetrating beneath the crico-pharyngeal 



muscle. 



According to Goubaux, the left recurrent must be situated more super- 



V.VEPMOflCKCN SC 



