Innermost intercostal muscle
Encyclopedia
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:
Intercostal nerves
The intercostal nerves are the anterior divisions of the thoracic spinal nerves from T1 to T11.Each nerve is connected with the adjoining ganglion of the sympathetic trunk by a gray and a white ramus communicans...
and intercostal vessels and the internal intercostal muscles. These are divided into:
- transversus thoracis anteriorly
- lateral muscle slips laterally (which cross a single intercostal spaceIntercostal spaceThe intercostal space is the space between two ribs . Since there are 12 ribs on each side, there are 11 intercostal spaces, each numbered for the rib superior to it.-Structures in intercostal space:* several kinds of intercostal muscle...
) - subcostalis posteriorly (which often cross more than one intercostal space)