PLATE XLIL 



MUSCLES 



A Complexus (right). 



A' Complexus (left) cut. 



B Inner portion of complexus, known as 

 biventer cervicis. 



C Splenius capitis. 



C' Splenius colli. 



D Eight sterno-mastoid. 



E Cervical fascia over the sterno- 

 mastoid. 



F Trapezius. 



F' Origin of trapezius from superior 

 curved line and external protube- 

 rance of occipital bone. 



G Levator anguli scapulae. 



H Serratus posticus superior. 



H' Insertion of serratus into ribs. 



I Ehomboideus minor. 



K Ehomboideus major. 



J_ Triangular smooth surface at base of 

 spine of scapula. 



M Semispinalis colli. 



N Transversalis colli. 



Cervicalis ascendens. 



P Scalenus posticus. 



Q The ribs ; the numlers show their 



order. 



R Left sterno-mastoid. 

 S Eectus capitis posticus minor. 

 T Eectus capitis posticus major. 

 V Inferior oblique. 

 W Superior oblique. 

 X Trachelo-rnastoid. 



Y Articular processes of cervical verte- 

 brae. 



2 = second and third. 



8 = third and fourth. 



4 = fourth and fifth, &c. 

 Z Posterior arch of atlas, 

 t External occipital protuberance. 



* The numbers in the centra line mark the position of the spines of the cervical 

 and dorsal vertebra. 



VESSELS 



a Vertebral artery. 

 b Occipital artery, 

 c Princeps cervicis, 

 occipital. 



a branch of the 



d Profunda cervicis, a branch of the 

 superior intercostal ascending to 

 anastomose with the princeps. 



e A twig from the posterior scapular. 



NERVES 



1 Suboccipital. 



2 Its anterior division. 



8 Its branch to the inferior oblique, also 

 sending a twig to join the great 

 occipital. 



4 Its branch to the recti postici. 



5 Its branch to the superior oblique 



which also sent a twig to complexus. 

 1 Great occipital (internal branch of 



posterior division of second cervical). 

 '7 External muscular branch of second 



cervical. 



8 Internal branch of third cervical 



which joins great occipital after 

 piercing complexus. 



9 External muscular branch of third. 



10 Internal branch of fourth. 



11 External branch of fourth. 



12 Internal branch of fifth. 

 18 External branch of fifth. 

 14 Small occipital. 



