The Neck. 487 



ness of action of the sterno-hyoid, sterno-thyroid and the 

 omo-hyoid muscles ; (4) on the sympathetic symptoms of 

 irritation or of paralysis, such as, in the former condition, 

 i.e., in irritation, (there might be dilatation of the pupil, 

 profuse sweating of one side of the face, pallor, disturb- 

 ance of vision (because of the inability to accommodate 

 for near objects, since the pupil cannot be contracted) ; 

 whereas, in paralysis of this nerve, there will be active 

 congestion on one side of the face, contraction of the pupil 

 (unopposed third nerve action), sinking of the eyeball 

 (Mullet's muscle) ; (5) on the larynx or trachea there 

 might be interference with respiration, or, on the oesopha- 

 gus, with swallowing. 



