302 



DOESAL MUSCLES OF THE TRUNK. 



Fig. 217. — View of the 

 DEEP Muscles of the 

 Back, showing their 

 Attachments to the 

 Vertebral Column and 

 Kiiis. (A. T.) i 



On tlie left side the seve- 

 I'al parts of the erector si^i- 

 naj are nearly in their na- 

 tural position, with the 

 exception of the spinalis 

 dorsi, which is drawn out 

 laterally from the spines of 

 the vertebrte ; on the right 

 side the spinalis dorsi has 

 been entirely removed, the 

 ilio-costalis drawn to the 

 outer side so as to exjiose 

 its accessory muscle, and 

 the longissimus removed, 

 excepting small jiortions at 

 its insertions. Superiorly 

 on the left side, the trache- 

 lomastoid and comislexus 

 are left nearly in their 

 natural positions ; while, 

 on the right side, the 

 trachelo-mastoid has been 

 entirely removed, and the 

 complexus, separated from 

 its occipital attachment, 

 has been spread out so as 

 to stretch its vertebral 

 attachments, a, occipital 

 l^rotuberance ; h, mastoid 

 process ; c, bifid spinous 

 jirocess of the axis ver- 

 tebra ; I, spinous process 

 of the first dorsal vertebra 

 and first rib ; VI, sixth 

 dorsal spine and trans- 

 verse process and sixth rib ; 

 XII, twelfth dorsal spine 

 and twelfth rib. On the left 

 fiide of the figure, 1, com- 

 plexus muscle ; 2, trachelo- 

 mastoid ; 3, serratus pos- 

 ticus superior, detached 

 from the vertebral column 

 and drawn upwards from 

 the ribs ; 4, 4, the slips of 

 attachment of the serratus 

 posticus inferior to the 

 four lower ribs ; 5, three 

 slips of origin of the latis- 

 simus dorsi from the lower 

 ribs ; 5', iliac origin of 

 the same muscle ; 6 + , 

 common origin of the lon- 

 gissimus dorsi and ilio-cos- 

 talis from the ilium and 

 sacrum, &c. ; 6, upper part 

 of the longissimus dorsi ; 

 C, transversalis cervicis 

 continued up from the Ion- 



