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SUMMARY OF MUSCLES OF THE TRUNK. 



MUSCLES OP THE BACK, ARRANGED INTO SIX LAYERS. 



FIRST LAYER Two pairs of Muscles. 



Trapezius. 



Latissimus dorsi. 



SECOND LAYER Three pairs- 

 Levator anguli scapula. 

 Rhomboideus minor. 

 Rhomboideus major. 



THIRD LAYER Four pairs. 

 Serratus posticus superior. 

 Serratus posticus inferior. 

 Splenius capitis. 

 Splenius colli. 



FOURTH LAYER Seven pairs. 

 Sacro-lumbalis. 

 Longissimus dorsi. 

 Spinalis dorsi. 

 Cervicalis ascendens. 



Transversalis colli. 



Trachelo-mastoideus. 



Complexus. 



FIFTH LAYER Seven pairs. 

 Rectus capitis posticus major. 

 Rectus capitis posticus minor. 

 Rectus capitis lateralis. 

 Obliquus capitis superior. 

 Obliquus capitis inferior. 

 Semi-spinalis dorsi. 

 Semi-spinalis colli. 



SIXTH LAYER Five pairs. 

 Multifidus spinae. 

 Levatores costarum. 

 Supra-spinales. 

 Inter-spinales. 

 Inter-transversales. 



MUSCLES OP THE ABDOMEN SEVEN PAIRS. 



Obliquus externus abdominis descen- 



dens. 



Obliquus internus abdominis ascendens. 

 Transversalis. 



Cremaster. 

 Rectus abdominis. 

 Pyramidalis. 

 Quadratus lumborum. 



MUSCLES OF THE CHEST FOUR PAIRS, PROPERLY SPEAKING. 



Pectoralis major. 

 Pectoralis minor. 

 Subclavius. 



Serratus major anticus. 

 Intercostales externi. 



Intercostales interni. 

 Levatores costarum. 

 Triangularis sterni. 

 Diaphragm. 



MUSCLES OF THE PELVIS. 



THOSE OF THE INTERIOR ARE, 



Psoas magnus. 

 Psoas parvus. 

 Iliacus internus. 



THOSE OF THE EXTERIOR ARE, 



Gluteus maximus. 

 Gluteus medius. 

 Gluteus minimus. 

 Pyriformis. 

 Gemellus superior. 

 Gemellus inferior. 

 Quadratus femoris. 



Obturator externus. 

 Obturator internus. 



THOSE OF THE INFERIOR PELVIS ARE, 



Sphincter ani. 

 Transversus perinei. 

 Accelerator urina3. 

 Erector penis. 

 Levator ani. 

 Coccygeus. 

 Compressor urethrae. 

 Erector clitoridis. 

 Constrictor vaginae. 



