THE PRINCIPLES OF MYODYNAMICS. 146 



major, the sterno-cleido-mastoid, and the acces- 

 sory hyoid groups of muscles. 



(2.) The extensors of the skull are: The 

 rectus capitis posticus minor, the rectus capitis 

 posticus major, the superior oblique, the trach- 

 elo-mastoid, the splenius capitis, the complexus, 

 the biventer cervicis, and the trapezius. 



(3.) The right 7^otators of the skull are : The 

 left sterno-cleido-mastoid, the left trapezius, the 

 right splenius capitis, the right trachelo-mastoid, 

 the right rectus capitis posticus major, and the 

 right rectus capitis anticus major. 



(4.) The left rotators of the skull are : The 

 right sterno-cleido-mastoid, the right trapezius, 

 the left splenius capitis, the left trachelo-mas- 

 toid, the left rectus capitis posticus major, and 

 the left rectus capitis anticus major. 



(5.) The right adductors of the skull are : The 

 right rectus capitis lateralis, the right superior 

 oblique, the right trapezius, the right splenius 

 capitis, the right trachelo-mastoid, and the right 

 sterno cleido-mastoid. 



(6.) The left addtidors of the skull are : The 



