144 



ATLAS AND TEXT-BOOK OF HUMAN ANATOMY. 



Fig. 2 3 6.-The superficial layer of the fiat muscles of the back together with the neighboring muscles 

 of the head, neck, abdomen, and buttock 

 Upon the- right side- the rhomboideus major and the teres major are represented covered bv fascia 



I m n , " u "' •• reC °? mZed " lhC deepCT ^^ '"' tht ' mUsdeS ° f thc back ^ neck " The muscles of the 



abdomen and of h, extremities arise secondarily from the myotomes. In man the musculature of the extremities is 

 verj strongly developed and covers the entire dorsal and part of the ventral musculature of the trunk 



accor, lih n 'r K l ^ ^ ' ^ff™ ado V ted f " r * e muscIes is a topographical one, an arrangement which best 

 cords mth an a, as designed as an aid for the laboratory. Such a classification, however, is in many cases faulty in that 



i£ : n" z: r ■ tr r T oiphol r al reUtions ,,f ,i,r muscies ' ^^ gr,,u > ,i ^ «■■*»« m - d - -*<* *- «** 



1 e cloT f ^ h ^ UeS ', and . SOmetmes ■*•»*« in different groups muscles which in reality are closely related. 



SPECIAL MYOLOGY. 

 THE MUSCLES OF THE TRUNK. 



THE MUSCLES OF THE BACK. 



The muscles of thc back arc arranged in layers and extend throughout thc neck, the back 

 and the lumbar region. The muscles of thc individual layers may be advantageously "grouped 



Lumbar vertebra 



Transversus abdominis 



Obi iq u us 

 abdominis 

 intern us 

 r 



Obliquus ab- 

 dominis 

 extern us 



Latissimus 



Junction oj anterior and posterior layers of 

 lumbo-dorsaJ fascia 



Lumbo-dorsal fascia Lone muscles r „ 



f,o. w-iwa* <„„•„„ oi „„. ,„.,„,,, ,,,„ „ f „„. :] , nen in ihi . ]umbar regio „_ {schematicX 



ritfmu^t ^ fl ', hr " S " bdi ^°«r% §* « SSta muscles, thc long muscles, and 

 short muscles. The flat muscles are still further subdivisible into several layers, some of 



