Innermost intercostal muscle
From Wikipedia, the free encyclopedia
| Innermost intercostal muscle | |
|---|---|
| Latin | musculus intercostalis intimus |
| Origin | Upper border of a rib |
| Insertion | Inferior border of the rib above |
| Artery | intercostal arteries |
| Nerve | intercostal nerves |
| Actions | Through adduction of upper ribs to the lower ribs the muscles narrow intercostal slits and diminish thorax volume, therefore the muscles represent expiratory muscles. |
The innermost intercostal muscle is a layer of intercostal muscles deep to the plane that contains the intercostal nerves and intercostal vessels and the internal intercostal muscles. These are divided into:
- transversus thoracis anteriorly
- lateral muscle slips laterally (which cross a single intercostal space)
- subcostalis posteriorly (which often cross more than one intercostal space)
[edit] External links
- innermost+intercostal+muscle at eMedicine Dictionary
- SUNY Labs 18:04-0103 - "Thoracic Wall: The Intercostal Nerve and Vessels"
- SUNY Figs 18:03-04 - "Transverse section of thorax."
- -301596595 at GPnotebook
- thoraxmuscles at The Anatomy Lesson by Wesley Norman (Georgetown University)
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