360 



THE SYMPATHETIC NERVES. 



few medullated fibres of varying size, even in regions where distinct white rami do 

 not exist (Langley). 



.From each grey ramus a filament is given off to join the recurrent branch of 



Fig. 230. THE SUPERIOR CKK- 



VICAL GANGLION OF THK 

 SYMPATHETIC, WITH I !'S 

 BRANCHES AND CONNEC- 

 TIONS. (Henle. ) 



1, styloid process ; '2, 

 uvula ; 3, great cornu of 

 liyoid bone, pushing up tlie 

 posterior wall of the pharynx ; 

 4, oesophagus ; 5, thyroid 

 body ; Sp, stylo-pharyngcns 

 in uscle. 



Cc, common carotid artery ' 

 Ci, internal carotid ; Ge, ex- 

 ternal carotid ; t su, superior 

 thyroid ; 1, lingual ; m e, 

 facial. 



IX, gl osso-pharyngeal 

 nerve ; X, vagus ; XII, hypo- 

 glossal ; c 1 , first cervical ; 

 c' 2 , second cervical ; ph, pha- 

 ryngeal branch of vagus ; I r s, 

 superior laryngeal ; d h, de- 

 scending cervical nerve ; 

 G c s, superior cervical gang- 

 lion of sympathetic ; c i, as- 

 cending branch ; j, jugular 

 branch ; c d s. superior cardiac 



the corresponding spinal 

 nerve, which is distribu- 

 ted in the interior of the 

 spinal canal (p. 278). 

 Other filaments pass over 

 the bodies of the verte- 

 bras, supplying the in- 

 tercostal and lumbar 

 arteries, the ligaments, 

 and the bones. 



The portions of the 

 sympathetic cord inter- 

 vening between the 

 ganglia are composed 

 of a white and a grey 

 part, the former, which 

 is usually the larger, 

 consisting of medul- 

 lated fibres continued 

 from the white rami 

 communicantes, and the 

 latter of pale fibres, 

 which arise in the 



ganglia and run along the cord before entering the efferent branches. 



The rami etferentes are the branches proceeding from the gangliated cord to 



the prevertebral plexuses, and likewise composed of medullated fibres of spinal 



origin and pale fibres springing from the ganglia. 



