THE MUSCLES, 



I. MUSCLES OF THE HEAD. 



I. Muscles of the Eye. 



/l.; M. rectus inferior (Fig-. 48 rl'). 



Dugès, post-orbito-sous-oculaire, n. 12. — Zenker, depressor oculi. 



This muscle arises Ly a very thin, almost thread-like tendon 

 from the parasphenoid^ near the /oramefi oplictim, and becomes raj^idly 

 broader; it lies beneath the tendon of 

 the memhrana nictitans and a part of the ^^K- 48- 



m. retractor hidbi : then runs forwards 

 and outwards to be attached into the 

 lower part of the circumference of the 

 eyeball, 



2. M. rectus externns (Fig-. 48 re). 



Dugès, post-orbito-ex-oculaire, n. 14. 



Arises by a thin, thread-like tendon 

 from the parasphenoid near the fora- 

 men opticunt, internal to and a little be- 

 hind the m. rectus inferior : it then passes 

 obliquely outwards over the m. retractor 

 hulbi and the tendon of the memhrana 

 nictitans, to be inserted into the outer 

 and hinder part of the circumference 

 of the eyeball. 



3. 31. rectus internus (Fig. 48 ;■/). 



Dugès, post-orbito-in-oculaire, n. 13. 



A long, thin muscle, which arises by 

 a thread-like tendon from the parasphenoid at the inner and 



Eye muscles of liana csculenta, from 

 below. 



On the riglit side [i. c. in the left eye) 

 the lev. bulbi (I) is taken away ; on 

 the left side it is still present. 



I M. levator bulbi. 



l.a M. lev. anguli scapulae 



i)i M. obliquus inferior. 



OS M. obliquus s\iperior. 



p M. pterygoideiis. 



r M. retractor bulbi. 



re M. rectus externus. 



1 First cervical vertebra. 



