Innermost intercostal muscle
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.
Innermost intercostal muscle | |
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![]() Innermost intercostal muscle (red), seen from back. | |
Details | |
Origin | Infero-posterior border of each rib (above) |
Insertion | Supero-posterior border of the rib (below) |
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. |
Identifiers | |
Latin | musculus intercostalis intimus |
TA | A04.4.01.014 |
FMA | 74086 |
Anatomical terms of muscle |
Additional images
- Innermost intercostal muscle (shown in red). Animation.
- A cutout of the thoracic wall showing the three layers of intercostal muscle - from the left wall.
gollark: Wow, it is very slow.
gollark: Let's make some ~~pointless~~ pointfree code!
gollark: ```haskell(...) = (.) . (. (.)) . (.) . (. (. (.))) . ((.) .)``````haskell(...) :: (((b1 -> c1) -> c2) -> b2 -> c3) -> (a1 -> b3 -> c2) -> a1 -> (((a2 -> b1) -> a2 -> c1) -> b3) -> (a3 -> b2) -> a3 -> c3```
gollark: Oh, that.
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External links
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Wikimedia Commons has media related to Innermost intercostal muscles. |
- Anatomy photo:18:04-0103 at the SUNY Downstate Medical Center - "Thoracic Wall: The Intercostal Nerve and Vessels"
- Anatomy figure: 18:03-04 at Human Anatomy Online, SUNY Downstate Medical Center - "Transverse section of thorax."
- thoraxmuscles at The Anatomy Lesson by Wesley Norman (Georgetown University)
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