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Mucles of the Thorax and Abdomen
Origins
12
Anatomy
04/24/2011
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Term
External Intercostals
 Definition

 

 

Inferior margins of ribs (1-11)

 
Term

 

 

 

Internal Intercostals

 Definition

 

 

 

 Superior margin and costal cartilages of ribs 2-12; margin of sternum
Term

 

 

 

Intermost Intercostals

 Definition

 

 

Superomedial surface of ribs 2-12
Term

 

 

 

Transverses Thoracis

 Definition

 

 

Posterior surface of sternal body and xiphiod
Term

 

 

 

Diaphragm

 Definition

 

Posterior surface of xiphoid and surfaces of ribs 9-12, costal cartilages 6-8, surface (epimysium) over quadratus lumborum and Psoas major mm, bodies vertebrae L1-L3
Term

 

 

Rectus Abdominis

 Definition

 

 

Xiphoid and costal cartilages 5-7
Term

 

 

 

External Oblique

 Definition

 

 

Lower 8 ribs and iliac crest
Term

 

 

 

Internal oblique

 Definition

 

 

Front of iliac crest and inguinal ligament
Term

 

 

Transverses Abdominus 

 Definition

 

 

 

Aponeurosis behind Quadratus lumborum
Term

 

 

 

Quadratus Lumborum

 Definition

 

 

 

iliolumbar ligament, iliac crest
Term

 

 

 

Psoas Major

 Definition

 

 

 

Bodies and intervertebral disc of T12-L5
Term



Psoas Minor
 Definition

 

 

 

Bodies and disc of T12-L1