126 



THE SKELETON. 



Attachment of Muscles. To the Atlas are attached the Longus Colli, Rectus 

 Anticus Minor, Rectus Lateralis, Rectus Posticus Minor, Obliquus Superior and 

 Inferior, Splenius Colli, Levator Anguli Scapulae, Interspinous, and Inter- 

 transverse. 



To the Axis are attached the Longus Colli, Obliquus Inferior, Rectus Posticus 

 Major, Semi-spinalis Colli, Multifidus Spinae, Levator Anguli Scapulae, Splenius 

 Colli, Transversalis Colli, Scalenus Posticus, Intertransversales, Interspinales. 



To the remaining Vertebrae generally are attached, anteriorly, the Rectus 

 Anticus Major, Longus Colli, Scalenus Anticus and Posticus, Psoas Magnus, 

 Psoas Parvus, Quadratus Lumborum, Diaphragm, Obliquus Internus and Trans- 

 versalis ; posteriorly, the Trapezius, Latissimus Dorsi, Levator Anguli Scapulae, 

 Rhomboideus Major and Minor, Serratus Posticus Superior and Inferior, Sple- 

 nius, Sacro-lumbalis, Longissimus Dorsi, Spinalis Dorsi, Cervicalis Ascendens, 

 Transversalis Collis, Trachelo-mastoid, Complexus, Semi-Spinalis Dorsi and 

 Colli, Multifidus Spinae, Interspinales, Supraspinales, Intertransversales, Leva- 

 tores Costarum. 



The Sacral and Coccygeal Vertebrae consist, at an early period of life, of nine 

 separate pieces, which are united in the adult, so as to form two bones, five 

 entering into the formation of the sacrum, four into that of the coccyx. Occa- 

 sionally, the coccyx consists of five bones. 1 



THE SACRUM. 



The Sacrum (Fig. 81) is a large triangular bone, situated at the lower part 

 of the vertebral column, and at the upper and back part of the pelvic cavity, 



Fig. 81. Sacrum, Anterior Surface. 



1 Dr. Humphry describes this as the usual composition of the Coccyx. On the Skeleton, p. 

 456. 



