210 



THE MUSCLES. 



A. Muscles of the Back and Cervix. 



In the trapezius of Man, a cervical and a dorsal portion can no longer be distinguished. 

 Above, it is attached to the superior occipital curved line ; below, it is fixed to the 

 external third of the upper border of the clavicle, and to the acromion and scapular spine. 



Fig. 107. 



FIRST, SECOND, AND PART OF THIRD LAYER OF MUSCLES OF THE BACK OF MAN; 

 THE FIRST LAYER OCCUPIES THE RIGHT, THE SECOND THE LEFT SIDE. 



1, Trapezius; 2, Tendinous portion, forming, with a corresponding part of the 

 opposite muscle, the tendinous ellipse on the back of the neck ; 3, Acromion 

 process and spine of scapula ; 4, Latissimus dorsi ; 5, Deltoid ; 6, Muscles of 

 dorsum of the scapula: infraspinatus, teres minor, and teres major; 7, Obliquus 

 externus ; 8, Gluteus medius ; 9, Glutei maximi ; 10, Levator anguli scapulae ; 

 11, Rhomboideus minor; 12, Rhomboideus major; 13, Splenius capitis, overlying 

 the splenius, above ; 14, Splenius colli, partially seen : the common origin of the 

 splenius is attached to the spinous processes below the origin of the rhomboideus 

 major; 15, Vertebral aponeurosis ; 16, Serratus posticus inferior; 17, Supra- 

 spinatus; 18, Infraspinatus; 19, Teres minor; 20, Teres major; 21, Long head 

 of triceps, passing between teres minor and maior to the arm ; 22, Serratus 

 magnus, proceeding forwards from its origin at the base of the scapula; 23, 

 Obliquus internus abdominis. 



The fibres of he trapezius which are fixed iuto the clavicle, represent a portion of the 

 mastoido-humeralid of quadrupeds. 



The great dorsal resembles that of the Dog and Pig, its fleshy portion being very 

 developed; it is attached to the external face of the four last ribs by muscular digitations, 

 and terminates on the border of the bicipital groove. 



