22O ANATOMY AND PHYSIOLOGY FOR NURSES 



Vieussens, enters the orbit through the sphenoid fissure, 

 and supplies the superior oblique muscle of the eye. 



FlG. 112. Superficial branches of cervical plexus : i, Superficial cer- 

 vical nerve ; 2, its inferior branch ; 3, its superior branch ; 4, its union with 

 facial; 5, great auricular nerve; 6, one of its facial branches; 7, its branch 

 to lobule; 8, twig which pierces the auricle; 9, branch to deep surface of 

 pinna; 10, its union with posterior auricular of the facial; u, small occipi- 

 tal nerve ; 12, its branches ; 13, a mastoid branch ; 14, twigs from this to 

 back of neck ; 15, inner; 16, 17, middle; 18, outer branches of supraclavic- 

 ular nerves; 19, branch of cervical nerves passing into trapezius muscle; 

 20, spinal accessory distributed to same, and receiving a uniting branch from 

 the cervical nerves; 21, branch to levator scapulae; 22, trunk of the facial 

 nerve; 23, its posterior auricular branch; 24, its cervical branch; 25, great 

 occipital nerve. 



The fifth nerve, called the trifacial, is the great sensory 

 nerve of the head and face and the motor nerve of the 

 muscles of mastication. It is a nerve of general sensation 



