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          Now
          viewing : Normal Anatomy of 12 Cranial Nerves 
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            I  | 
        
             II  | 
        
        
        
           III  | 
        
            IV  | 
        
            V  | 
        
            VI  | 
        
            VII  | 
        
            VIII  | 
        
            IX  | 
        
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       Perineural
        Metastasis to The Cranial Nerves in Head and Neck Malignancies | 
       
      
        
           
          NORMAL ANATOMY OF 12 CRANIAL NERVES
          
            
              
                  
                  Figure 1
          - Base of brain, viewed from above, to demonstrate the root entry zone
          of the cranial nerves. | 
                
                   Names of 12 Cranial
                  Nerves 
                     | 
               
              
                | I | 
                Olfactory | 
               
              
                | II | 
                Optic | 
               
              
                | III | 
                Oculomotor | 
               
              
                | IV | 
                Trochlear | 
               
              
                | V | 
                Trigeminal | 
               
              
                | VI | 
                Abducent | 
               
              
                | VII | 
                Facial | 
               
              
                | VIII | 
                Vestibulocochlear | 
               
              
                | IX | 
                Glossopharyngeal | 
               
              
                | X | 
                Vagus | 
               
              
                | XI | 
                Accessory | 
               
              
                | XII | 
                Hypoglossal | 
               
              
                
                   
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                | Figure 2
                  -
          Base of the brain, viewed from above, to demonstrate the exit of the
          cranial nerves.
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