Innermost intercostals
Chest
Deep muscle — it lies under other muscles. X-ray makes the muscles over it see-through.
- Origin
- Inner surface of each rib
- Insertion
- Inner surface of the rib below
- Action
- Thought to act with the internal intercostals
- Nerve supply
- Intercostal nerves (T1–T11)
The deepest and thinnest intercostal layer, separated from the internal intercostals by the nerve and vessels of each rib space. They are thought to work together with the internal intercostals.
Innermost intercostals anatomy page →