102 



ANATOIVIY FOR NURSES 



[Chap. VII 



from the liead. If one of these muscles be either abnormally con- 

 tracted or paralyzed, we get the deformity called Torticollis or 

 wrv neck. 



CHIEF MUSCLES OF THE TRUNK 



They may be arranjjjed in four groups : — 



_ . [ Trapezius. 

 1. Muscles of the Back ' 



2. Muscles of the Chest 



3. Muscles of the Thorax 



4. Muscles of the Abdomen 



Latissimus dorsi. 

 I Pcctoralis major. 

 I Pectoralis minor. 



I External intcrcostals. 

 Internal intcrcostals. 

 Levatores costarum. 

 External oblique. 

 Internal oblique. 

 Rectus abdominis. 

 Transvcrsalis. 



OCCIPITAL BONE 



Muscles of the back. — The muscles of the back are disposed in 

 five layers, one beneath another. The two largest and most su- 

 perficial muscles are: (1) the 

 trapezius, (2) the latissimus 

 dorsi. 



Trapezius. — The trapezius, 

 so called because right and 

 left together make a large dia- 

 mond-shaped sheet, arises from 

 the middle of the occipital 

 bone, from all the cervical and 

 all the thoracic vertebrae. The 

 connection with the cervical 

 \'ertebr<T is through the me- 

 dium of the ligamentuni nuchoB, 

 which is a form of ligament 

 that stretches from the protu- 

 berance of the occiput to the 

 spinous processes of the seven 

 cervical vertebrse. (See Fig. 



^ „„ ^ ^ ^, 73.) From this extended line 



Fig. 73. — The Lio.wientum Nucil*:. 



Seen from the right side. (Gerrish.) of origin the fibres converge 



r 



