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The Mm. intercostales and M. transversus thoracis muscles belong to the autochthonous chest musculature, which is an important part of the respiratory musculature. The Mm. scaleni belong to the deep neck muscles. As they functionally act as respiratory support muscles, they are also explained at this point.  
 
The Mm. intercostales and M. transversus thoracis muscles belong to the autochthonous chest musculature, which is an important part of the respiratory musculature. The Mm. scaleni belong to the deep neck muscles. As they functionally act as respiratory support muscles, they are also explained at this point.  
  
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{{ArticleMenu en|Links Übungsaufgaben=[[Special:MyLanguage/Übungsaufgaben: Thorax|Thorax]][[Special:MyLanguage/Übungsaufgabe: Brustkorbmuskulatur|Chest muscles]]|
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<!-- ==''Mm. intercostales, Mm. scaleni and M. transversus thoracis''== ''A schematic drawing of the muscles (Mm. intercostales, Mm. scaleni and M. transversus thoracis) can be displayed by clicking on the respective name in the "WebViewer".''-->
  
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===autochthonous chest muscles - <i>Mm. intercostales</i> und <i>M. transversus thoracis</i>===
 
===autochthonous chest muscles - <i>Mm. intercostales</i> und <i>M. transversus thoracis</i>===
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<td><b>origin</b></td>
 
<td><b>origin</b></td>
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<td>inside rib cartilage of 2nd-6th rib </td>
 
<td>inside rib cartilage of 2nd-6th rib </td>
 
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<td><b>insertion</b></td>
 
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<td>Inside of <i>Corpus sterni</i> and <i>Processus xiphoideus sterni</i></td>
 
<td>Inside of <i>Corpus sterni</i> and <i>Processus xiphoideus sterni</i></td>
 
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<td><b>innervation</b></td>
 
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===''Mm. scaleni''===
 
===''Mm. scaleni''===
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==Freie Exploration==
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==Free Exploration==
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<div style="float:left;width:50%">Schauen Sie sich die Struktur der Brustkorbmuskulatur in 3D an und explorieren Sie sie frei. Danach können Sie Ihr erlerntes Wissen durch die Übungsaufgaben überprüfen.</div>
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<div style="float:left;width:50%">Look at the structure of the chest muscles in 3D and explore it freely. Afterwards you can test your acquired knowledge by the exercises.</div>
 
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Aktuelle Version vom 11. Mai 2022, 07:46 Uhr

The Mm. intercostales and M. transversus thoracis muscles belong to the autochthonous chest musculature, which is an important part of the respiratory musculature. The Mm. scaleni belong to the deep neck muscles. As they functionally act as respiratory support muscles, they are also explained at this point.

Exercises
Exercises

ThoraxChest muscles

Neighboring structures
Neighboring structures

RibsSternum

Body regions
Body regions

Musculature torsoTorso

Organ system
Organ system

MusclesActive musculoskeletal systemMusculoskeletal system

autochthonous chest muscles - Mm. intercostales und M. transversus thoracis

Mm. intercostales externi Mm. intercostales interni M. transversus thoracis
origin Lower margin of a rib (Tuberculum costae up to Cartilage-bone junction) upper margin of a rib (Angulus costae to Sternum) inside rib cartilage of 2nd-6th rib
insertion upper margin of next deeper rib
progression: from posterior top to posterior bottom (Tuberculum costae to cartilage-bone junction)		 lower edge of next highest rib
progression: from back bottom to front top (Angulus costae to sternum)		 Inside of Corpus sterni and Processus xiphoideus sterni
function rib lifter (inspiration), tighten the interrib spaces;
stabilization of the thoracic wall		 rib countersink (expiration); tighten the interrib spaces;
stabilization of the thoracic wall		 Rib countersink (expiration)
innervation Nervi intercostales 1-11 Nervi intercostales 1-11 Nervi intercostales 2-6


Mm. scaleni

M. scalenus anterior M. scalenus medius M. scalenus posterior
origin Tubercula anteriora of the transverse processes of the 3rd-6th cervical vertebra Tubercula posteriora of the transverse processes of the 3rd - 7th cervical vertebra Tubercula posteriora of the transverse processes of the 5th-7th cervical vertebra
insertion Tuberculum musculi scaleni anterioris of the 1st rib 1st rib (dorsal of Sulcus arteriae subclaviae) Outside surface of the 2nd rib
function
  • Punctum mobile on the ribs: Inspiration (lifting of the upper ribs)
  • Fixed point on the ribs: one-sided contraction results in lateral flexion of the cervical spine to the ipsilateral side
  • Both-sided contraction results in ventral flexion of the neck
innervation direct branches from the spinal nerves cervical plexus and brachial plexus (C3-6)

Free Exploration

Look at the structure of the chest muscles in 3D and explore it freely. Afterwards you can test your acquired knowledge by the exercises.
  • FURTHER ARTICLES
  • Diaphragm
  • Sternum
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